!53 添加自动映射支持集合，以应对一对多、多对多

Merge pull request !53 from 王帅/main

docs/zh/base/field-query.md

@@ -2,7 +2,7 @@
 
 在很多场景下，我们可能会用到 `一对多`、`一对一`、`多对一`、`多对多`等场景的关联查询，MyBatis-Flex 内置了相关的方法，用于支持此类场景。
 
-## 代码示例（多对多）
+## 代码示例（Field Query）
 
 以下是文章的示例，一篇文章可能归属于多个分类，一个类可以有多篇文章，需要用到中间表 `article_category_mapping`。
 
@@ -104,4 +104,100 @@ List<Article> articles = mapper.selectListByQuery(query
 ## 更多场景
 
 通过以上内容看出，`Article` 的任何属性，都是可以通过传入 `FieldQueryBuilder` 来构建 `QueryWrapper` 进行再次查询，
-这些不仅仅只适用于  `一对多`、`一对一`、`多对一`、`多对多`等场景。任何 `Article` 对象里的属性，需要二次查询赋值的，都是可以通过这种方式进行。
+这些不仅仅只适用于  `一对多`、`一对一`、`多对一`、`多对多`等场景。任何 `Article` 对象里的属性，需要二次查询赋值的，都是可以通过这种方式进行。
+
+## 结果映射
+
+您也可以继续使用联表查询，如果是原生 MyBatis 的话，可以使用 `<resultMap>` 标签来构建结果映射，在 MyBatis-Flex 中提供了自动结果映射功能，这样您就可以只关注于 SQL 语句的构建。
+
+## 代码示例（Join Query）
+
+这里以用户和角色的 `多对多` 关系作为例子，首先有用户表和角色表，分别对应着用户类和角色类：
+
+```java
+@Table("sys_user")
+public class User {
+
+    @Id
+    private Integer userId;
+    private String userName;
+    
+}
+
+@Table("sys_role")
+public class Role {
+
+    @Id
+    private Integer roleId;
+    private String roleKey;
+    private String roleName;
+
+}
+```
+
+现在需要查询所有用户，以及每个用户对应的角色信息，并通过 UserVO 对象返回：
+
+```java
+public class UserVO {
+
+    private String userId;
+    private String userName;
+    private List<Role> roleList;
+
+}
+```
+
+这个操作只需要联表查询即可完成，对于联表查询的结果映射，MyBatis-Flex 会自动帮您完成：
+
+```java
+@SpringBootTest
+class UserMapperTest {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    @Test
+    void testSelectList() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select(USER.USER_ID, USER.USER_NAME, ROLE.ALL_COLUMNS)
+                .from(USER.as("u"))
+                .leftJoin(USER_ROLE).as("ur").on(USER_ROLE.USER_ID.eq(USER.USER_ID))
+                .leftJoin(ROLE).as("r").on(USER_ROLE.ROLE_ID.eq(ROLE.ROLE_ID));
+        List<UserVO> userVOS = userMapper.selectListByQueryAs(queryWrapper, UserVO.class);
+        userVOS.forEach(System.err::println);
+    }
+
+}
+```
+
+构建的联表查询 SQL 语句为：
+
+```sql
+SELECT `u`.`user_id`,
+       `u`.`user_name`,
+       `r`.*
+FROM `sys_user` AS `u`
+LEFT JOIN `sys_user_role` AS `ur` ON `ur`.`user_id` = `u`.`user_id`
+LEFT JOIN `sys_role` AS `r` ON `ur`.`role_id` = `r`.`role_id`;
+```
+
+最终自动映射的结果为：
+
+```text
+UserVO{userId='1', userName='admin', roleList=[Role{roleId=1, roleKey='admin', roleName='超级管理员'}]}
+UserVO{userId='2', userName='ry', roleList=[Role{roleId=2, roleKey='common', roleName='普通角色'}]}
+UserVO{userId='3', userName='test', roleList=[Role{roleId=1, roleKey='admin', roleName='超级管理员'}, Role{roleId=2, roleKey='common', roleName='普通角色'}]}
+```
+
+## 特别注意！！！
+
+使用 `join` 联表查询的时候，只能使用 `selectListXxx` 方法查询 List 数据，不能使用 `selectOneXxx` 方法查询单个数据。
+
+```java
+default <R> R selectOneByQueryAs(QueryWrapper queryWrapper, Class<R> asType) {
+    List<R> entities = selectListByQueryAs(queryWrapper.limit(1), asType);
+    return (entities == null || entities.isEmpty()) ? null : entities.get(0);
+}
+```
+
+因为这个 `selectOneXxx` 方法都是调用的对应的 `selectListXxx` 方法，其中添加了 `queryWrapper.limit(1)` 约束，将数据限制在了一条，而联表查询数据有可能是多条的，这样自动映射就会出现数据丢失。

mybatis-flex-core/src/main/java/com/mybatisflex/core/mybatis/FlexConfiguration.java

@@ -1,17 +1,17 @@
-/**
+/*
- * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
- * <p>
+ *  <p>
- * Licensed under the Apache License, Version 2.0 (the "License");
+ *  Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
+ *  you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ *  You may obtain a copy of the License at
- * <p>
+ *  <p>
- * http://www.apache.org/licenses/LICENSE-2.0
+ *  http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *  <p>
- * Unless required by applicable law or agreed to in writing, software
+ *  Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
+ *  distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
+ *  See the License for the specific language governing permissions and
- * limitations under the License.
+ *  limitations under the License.
  */
 package com.mybatisflex.core.mybatis;
 
@@ -27,7 +27,6 @@ import com.mybatisflex.core.row.RowMapper;
 import com.mybatisflex.core.table.EntityWrapperFactory;
 import com.mybatisflex.core.table.TableInfo;
 import com.mybatisflex.core.table.TableInfoFactory;
-import com.mybatisflex.core.util.CollectionUtil;
 import com.mybatisflex.core.util.StringUtil;
 import org.apache.ibatis.executor.CachingExecutor;
 import org.apache.ibatis.executor.Executor;
@@ -36,15 +35,15 @@ import org.apache.ibatis.executor.keygen.NoKeyGenerator;
 import org.apache.ibatis.executor.keygen.SelectKeyGenerator;
 import org.apache.ibatis.executor.parameter.ParameterHandler;
 import org.apache.ibatis.executor.statement.StatementHandler;
-import org.apache.ibatis.mapping.BoundSql;
+import org.apache.ibatis.mapping.*;
-import org.apache.ibatis.mapping.Environment;
-import org.apache.ibatis.mapping.MappedStatement;
-import org.apache.ibatis.mapping.ResultMap;
 import org.apache.ibatis.session.*;
 import org.apache.ibatis.transaction.Transaction;
 import org.apache.ibatis.util.MapUtil;
 
 import java.lang.reflect.Proxy;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -178,14 +177,40 @@ public class FlexConfiguration extends Configuration {
 
         String resultMapId = tableInfo.getEntityClass().getName();
 
-        ResultMap resultMap;
+        /*ResultMap resultMap;
         if (hasResultMap(resultMapId)) {
             resultMap = getResultMap(resultMapId);
         } else {
             resultMap = tableInfo.buildResultMap(this);
             this.addResultMap(resultMap);
+        }*/
+
+        // 变量名与属性名区分开
+        List<ResultMap> resultMapList;
+        if (hasResultMap(resultMapId)) {
+            resultMapList = new ArrayList<>();
+            fillResultMapList(resultMapId, resultMapList);
+        } else {
+            resultMapList = tableInfo.buildResultMapList(this);
+            for (ResultMap resultMap : resultMapList) {
+                if (!hasResultMap(resultMap.getId())) {
+                    addResultMap(resultMap);
+                }
+            }
         }
 
+        /*
+         * 这里解释一下为什么要反转这个集合：
+         *
+         * MyBatis 在解析 ResultMaps 的时候，是按照顺序一个一个进行解析的，对于有嵌套
+         * 的 ResultMap 对象，也就是 nestResultMap 需要放在靠前的位置，首先解析。
+         *
+         * 而我们进行递归 buildResultMapList 也好，fillResultMapList 也好，都是
+         * 非嵌套 ResultMap 在集合最开始的位置，所以要反转一下集合，将 hasNestedResultMaps
+         * 的 ResultMap 对象放到集合的最前面。
+         */
+        Collections.reverse(resultMapList);
+
         return new MappedStatement.Builder(ms.getConfiguration(), ms.getId(), ms.getSqlSource(), ms.getSqlCommandType())
                 .resource(ms.getResource())
                 .fetchSize(ms.getFetchSize())
@@ -198,7 +223,8 @@ public class FlexConfiguration extends Configuration {
                 .lang(ms.getLang())
                 .resultOrdered(ms.isResultOrdered())
                 .resultSets(ms.getResultSets() == null ? null : String.join(",", ms.getResultSets()))
-                .resultMaps(CollectionUtil.newArrayList(resultMap)) // 替换resultMap
+                //.resultMaps(CollectionUtil.newArrayList(resultMap)) // 替换resultMap
+                .resultMaps(resultMapList)
                 .resultSetType(ms.getResultSetType())
                 .flushCacheRequired(ms.isFlushCacheRequired())
                 .useCache(ms.isUseCache())
@@ -206,6 +232,19 @@ public class FlexConfiguration extends Configuration {
                 .build();
     }
 
+    private void fillResultMapList(String resultMapId, List<ResultMap> resultMapList) {
+        ResultMap resultMap = this.getResultMap(resultMapId);
+        resultMapList.add(resultMap);
+        if (resultMap.hasNestedResultMaps()) {
+            for (ResultMapping resultMapping : resultMap.getResultMappings()) {
+                String nestedResultMapId = resultMapping.getNestedResultMapId();
+                if (nestedResultMapId != null) {
+                    fillResultMapList(nestedResultMapId, resultMapList);
+                }
+            }
+        }
+    }
+
     /**
      * 生成新的、已替换主键生成器的 MappedStatement
      *

mybatis-flex-core/src/main/java/com/mybatisflex/core/table/TableInfo.java

@@ -1,17 +1,17 @@
-/**
+/*
- * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
- * <p>
+ *  <p>
- * Licensed under the Apache License, Version 2.0 (the "License");
+ *  Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
+ *  you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ *  You may obtain a copy of the License at
- * <p>
+ *  <p>
- * http://www.apache.org/licenses/LICENSE-2.0
+ *  http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *  <p>
- * Unless required by applicable law or agreed to in writing, software
+ *  Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
+ *  distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
+ *  See the License for the specific language governing permissions and
- * limitations under the License.
+ *  limitations under the License.
  */
 package com.mybatisflex.core.table;
 
@@ -39,6 +39,7 @@ import org.apache.ibatis.session.Configuration;
 import org.apache.ibatis.type.TypeHandler;
 import org.apache.ibatis.util.MapUtil;
 
+import java.lang.reflect.Field;
 import java.lang.reflect.Proxy;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -96,9 +97,24 @@ public class TableInfo {
     private List<UpdateListener> onUpdateListeners;
     private List<SetListener> onSetListeners;
 
+    /**
+     * @deprecated 该功能有更好的方式实现，此属性可能会被移除。
+     */
+    @Deprecated
     private Map<String, Class<?>> joinTypes;
 
 
+    /**
+     * 对应 MapperXML 配置文件中 {@code <resultMap>} 标签下的 {@code <association>} 标签。
+     */
+    private Map<String, Class<?>> associationType;
+
+    /**
+     * 对应 MapperXML 配置文件中 {@code <resultMap>} 标签下的 {@code <collection>} 标签。
+     */
+    private Map<Field, Class<?>> collectionType;
+
+
     private final ReflectorFactory reflectorFactory = new BaseReflectorFactory() {
         @Override
         public Reflector findForClass(Class<?> type) {
@@ -119,11 +135,11 @@ public class TableInfo {
         return tableName;
     }
 
-    public String getWrapSchemaAndTableName(IDialect dialect){
+    public String getWrapSchemaAndTableName(IDialect dialect) {
-        if (StringUtil.isNotBlank(schema)){
+        if (StringUtil.isNotBlank(schema)) {
-            return dialect.wrap(dialect.getRealSchema(schema)) +"." + dialect.wrap(dialect.getRealTable(tableName));
+            return dialect.wrap(dialect.getRealSchema(schema)) + "." + dialect.wrap(dialect.getRealTable(tableName));
-        }else {
+        } else {
-           return dialect.wrap(dialect.getRealTable(tableName));
+            return dialect.wrap(dialect.getRealTable(tableName));
         }
     }
 
@@ -296,6 +312,36 @@ public class TableInfo {
         joinTypes.put(fieldName, clazz);
     }
 
+    public Map<String, Class<?>> getAssociationType() {
+        return associationType;
+    }
+
+    public void setAssociationType(Map<String, Class<?>> associationType) {
+        this.associationType = associationType;
+    }
+
+    public void addAssociationType(String fieldName, Class<?> clazz) {
+        if (associationType == null) {
+            associationType = new HashMap<>();
+        }
+        associationType.put(fieldName, clazz);
+    }
+
+    public Map<Field, Class<?>> getCollectionType() {
+        return collectionType;
+    }
+
+    public void setCollectionType(Map<Field, Class<?>> collectionType) {
+        this.collectionType = collectionType;
+    }
+
+    public void addCollectionType(Field field, Class<?> genericClass) {
+        if (collectionType == null) {
+            collectionType = new HashMap<>();
+        }
+        collectionType.put(field, genericClass);
+    }
+
     void setColumnInfoList(List<ColumnInfo> columnInfoList) {
         this.columnInfoList = columnInfoList;
         this.columns = new String[columnInfoList.size()];
@@ -660,6 +706,10 @@ public class TableInfo {
                 .collect(Collectors.toList());
     }
 
+    /**
+     * @deprecated 该功能有更好的方式实现，此方法可能会被移除。
+     */
+    @Deprecated
     public ResultMap buildResultMap(Configuration configuration) {
         String resultMapId = entityClass.getName();
         List<ResultMapping> resultMappings = new ArrayList<>();
@@ -727,6 +777,90 @@ public class TableInfo {
         return new ResultMap.Builder(configuration, resultMapId, entityClass, resultMappings).build();
     }
 
+    public List<ResultMap> buildResultMapList(Configuration configuration) {
+        String resultMapId = entityClass.getName();
+        List<ResultMap> resultMaps = new ArrayList<>();
+        List<ResultMapping> resultMappings = new ArrayList<>();
+
+        // <resultMap> 标签下的 <result> 标签映射
+        for (ColumnInfo columnInfo : columnInfoList) {
+            ResultMapping mapping = new ResultMapping.Builder(configuration, columnInfo.property,
+                    columnInfo.column, columnInfo.propertyType)
+                    .jdbcType(columnInfo.getJdbcType())
+                    .typeHandler(columnInfo.buildTypeHandler())
+                    .build();
+            resultMappings.add(mapping);
+
+            //add property mapper for sql: select xxx as property ...
+            if (!Objects.equals(columnInfo.getColumn(), columnInfo.getProperty())) {
+                ResultMapping propertyMapping = new ResultMapping.Builder(configuration, columnInfo.property,
+                        columnInfo.property, columnInfo.propertyType)
+                        .jdbcType(columnInfo.getJdbcType())
+                        .typeHandler(columnInfo.buildTypeHandler())
+                        .build();
+                resultMappings.add(propertyMapping);
+            }
+        }
+
+        // <resultMap> 标签下的 <id> 标签映射
+        for (IdInfo idInfo : primaryKeyList) {
+            ResultMapping mapping = new ResultMapping.Builder(configuration, idInfo.property,
+                    idInfo.column, idInfo.propertyType)
+                    .flags(CollectionUtil.newArrayList(ResultFlag.ID))
+                    .jdbcType(idInfo.getJdbcType())
+                    .typeHandler(idInfo.buildTypeHandler())
+                    .build();
+            resultMappings.add(mapping);
+        }
+
+        // <resultMap> 标签下的 <association> 标签映射
+        if (associationType != null) {
+            associationType.forEach((fieldName, fieldType) -> {
+                // 获取嵌套类型的信息，也就是 javaType 属性
+                TableInfo tableInfo = TableInfoFactory.ofEntityClass(fieldType);
+                // 构建嵌套类型的 ResultMap 对象，也就是 <association> 标签下的内容
+                // 这里是递归调用，直到嵌套类型里面没有其他嵌套类型或者集合类型为止
+                List<ResultMap> resultMapList = tableInfo.buildResultMapList(configuration);
+                // 寻找是否有嵌套 ResultMap 引用
+                Optional<ResultMap> nestedResultMap = resultMapList.stream()
+                        .filter(e -> fieldType.getName().equals(e.getId()))
+                        .findFirst();
+                // 处理嵌套类型 ResultMapping 引用
+                nestedResultMap.ifPresent(resultMap -> resultMappings.add(new ResultMapping.Builder(configuration, fieldName)
+                        .javaType(fieldType)
+                        .nestedResultMapId(resultMap.getId())
+                        .build()));
+                // 全部添加到 ResultMap 集合当中
+                resultMaps.addAll(resultMapList);
+            });
+        }
+
+        // <resultMap> 标签下的 <collection> 标签映射
+        if (collectionType != null) {
+            collectionType.forEach((field, genericClass) -> {
+                // 获取集合泛型类型的信息，也就是 ofType 属性
+                TableInfo tableInfo = TableInfoFactory.ofEntityClass(genericClass);
+                // 构建嵌套类型的 ResultMap 对象，也就是 <collection> 标签下的内容
+                // 这里是递归调用，直到集合类型里面没有其他嵌套类型或者集合类型为止
+                List<ResultMap> resultMapList = tableInfo.buildResultMapList(configuration);
+                // 寻找是否有嵌套 ResultMap 引用
+                Optional<ResultMap> nestedResultMap = resultMapList.stream()
+                        .filter(e -> genericClass.getName().equals(e.getId()))
+                        .findFirst();
+                // 处理嵌套类型 ResultMapping 引用
+                nestedResultMap.ifPresent(resultMap -> resultMappings.add(new ResultMapping.Builder(configuration, field.getName())
+                        .javaType(field.getType())
+                        .nestedResultMapId(resultMap.getId())
+                        .build()));
+                // 全部添加到 ResultMap 集合当中
+                resultMaps.addAll(resultMapList);
+            });
+        }
+
+        resultMaps.add(new ResultMap.Builder(configuration, resultMapId, entityClass, resultMappings).build());
+
+        return resultMaps;
+    }
 
     private static boolean existColumn(List<ResultMapping> resultMappings, String name) {
         for (ResultMapping resultMapping : resultMappings) {

mybatis-flex-core/src/main/java/com/mybatisflex/core/table/TableInfoFactory.java

@@ -212,11 +212,19 @@ public class TableInfoFactory {
                     && !fieldType.isEnum()   // 类型不是枚举
                     && !defaultSupportColumnTypes.contains(fieldType) //默认的自动类型不包含该类型
             ) {
-                if (!Map.class.isAssignableFrom(fieldType)
+                // 集合嵌套
-                        && !Collection.class.isAssignableFrom(fieldType)
+                if (Collection.class.isAssignableFrom(fieldType)) {
-                        && !fieldType.isArray()) {
+                    ParameterizedType genericType = (ParameterizedType) field.getGenericType();
-                    tableInfo.addJoinType(field.getName(), fieldType);
+                    Type actualTypeArgument = genericType.getActualTypeArguments()[0];
+                    tableInfo.addCollectionType(field, (Class<?>) actualTypeArgument);
                 }
+                // 实体类嵌套
+                else if (!Map.class.isAssignableFrom(fieldType)
+                        && !fieldType.isArray()) {
+                    // tableInfo.addJoinType(field.getName(), fieldType);
+                    tableInfo.addAssociationType(field.getName(), fieldType);
+                }
+                // 不支持的类型直接跳过
                 continue;
             }
 

mybatis-flex-test/mybatis-flex-spring-boot-test/pom.xml

@@ -45,13 +45,18 @@
             <artifactId>spring-boot-starter-data-jdbc</artifactId>
         </dependency>
 
-
         <dependency>
-            <groupId>com.h2database</groupId>
+            <groupId>mysql</groupId>
-            <artifactId>h2</artifactId>
+            <artifactId>mysql-connector-java</artifactId>
-            <version>2.1.214</version>
         </dependency>
 
+
+<!--        <dependency>-->
+<!--            <groupId>com.h2database</groupId>-->
+<!--            <artifactId>h2</artifactId>-->
+<!--            <version>2.1.214</version>-->
+<!--        </dependency>-->
+
 <!--        <dependency>-->
 <!--            <groupId>org.yaml</groupId>-->
 <!--            <artifactId>snakeyaml</artifactId>-->

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/Account.java

@@ -1,23 +1,23 @@
-/**
+/*
- * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
- * <p>
+ *  <p>
- * Licensed under the Apache License, Version 2.0 (the "License");
+ *  Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
+ *  you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ *  You may obtain a copy of the License at
- * <p>
+ *  <p>
- * http://www.apache.org/licenses/LICENSE-2.0
+ *  http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *  <p>
- * Unless required by applicable law or agreed to in writing, software
+ *  Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
+ *  distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
+ *  See the License for the specific language governing permissions and
- * limitations under the License.
+ *  limitations under the License.
  */
 package com.mybatisflex.test.model;
 
 import com.mybatisflex.annotation.Id;
-import com.mybatisflex.annotation.Table;
 import com.mybatisflex.annotation.KeyType;
+import com.mybatisflex.annotation.Table;
 
 import java.util.Date;
 

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/Good.java

@@ -0,0 +1,68 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.Table;
+
+/**
+ * 商品。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@Table("tb_good")
+public class Good {
+
+    @Id
+    private Integer goodId;
+    private String name;
+    private double price;
+
+    public Integer getGoodId() {
+        return goodId;
+    }
+
+    public void setGoodId(Integer goodId) {
+        this.goodId = goodId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "Good{" +
+                "goodId=" + goodId +
+                ", name='" + name + '\'' +
+                ", price=" + price +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/Order.java

@@ -0,0 +1,60 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.Table;
+
+import java.time.LocalDateTime;
+
+/**
+ * 订单。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@Table("tb_order")
+public class Order {
+
+    @Id
+    private int orderId;
+    private LocalDateTime createTime;
+
+    public int getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(int orderId) {
+        this.orderId = orderId;
+    }
+
+    public LocalDateTime getCreateTime() {
+        return createTime;
+    }
+
+    public void setCreateTime(LocalDateTime createTime) {
+        this.createTime = createTime;
+    }
+
+    @Override
+    public String toString() {
+        return "Order{" +
+                "orderId=" + orderId +
+                ", createTime=" + createTime +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/OrderGood.java

@@ -0,0 +1,48 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Table;
+
+/**
+ * 订单与商品连接表。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@Table("tb_order_good")
+public class OrderGood {
+
+    private Integer orderId;
+    private Integer goodId;
+
+    public Integer getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(Integer orderId) {
+        this.orderId = orderId;
+    }
+
+    public Integer getGoodId() {
+        return goodId;
+    }
+
+    public void setGoodId(Integer goodId) {
+        this.goodId = goodId;
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/OrderInfo.java

@@ -0,0 +1,67 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * 订单信息。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+public class OrderInfo {
+
+    private Integer orderId;
+    private LocalDateTime createTime;
+
+    private List<Good> goodList;
+
+    public Integer getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(Integer orderId) {
+        this.orderId = orderId;
+    }
+
+    public LocalDateTime getCreateTime() {
+        return createTime;
+    }
+
+    public void setCreateTime(LocalDateTime createTime) {
+        this.createTime = createTime;
+    }
+
+    public List<Good> getGoodList() {
+        return goodList;
+    }
+
+    public void setGoodList(List<Good> goodList) {
+        this.goodList = goodList;
+    }
+
+    @Override
+    public String toString() {
+        return "OrderInfo{" +
+                "orderId=" + orderId +
+                ", createTime=" + createTime +
+                ", goodList=" + goodList +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/Role.java

@@ -0,0 +1,68 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.Table;
+
+/**
+ * 角色。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@Table("tb_role")
+public class Role {
+
+    @Id
+    private Integer roleId;
+    private String roleKey;
+    private String roleName;
+
+    public Integer getRoleId() {
+        return roleId;
+    }
+
+    public void setRoleId(Integer roleId) {
+        this.roleId = roleId;
+    }
+
+    public String getRoleKey() {
+        return roleKey;
+    }
+
+    public void setRoleKey(String roleKey) {
+        this.roleKey = roleKey;
+    }
+
+    public String getRoleName() {
+        return roleName;
+    }
+
+    public void setRoleName(String roleName) {
+        this.roleName = roleName;
+    }
+
+    @Override
+    public String toString() {
+        return "Role{" +
+                "roleId=" + roleId +
+                ", roleKey='" + roleKey + '\'' +
+                ", roleName='" + roleName + '\'' +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/User.java

@@ -0,0 +1,69 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.Table;
+
+/**
+ * 用户。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+
+@Table("tb_user")
+public class User {
+
+    @Id
+    private Integer userId;
+    private String userName;
+    private String password;
+
+    public Integer getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Integer userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "userId=" + userId +
+                ", userName='" + userName + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserInfo.java

@@ -0,0 +1,86 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import java.util.List;
+
+/**
+ * 用户信息。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+public class UserInfo {
+
+    private Integer userId;
+    private String userName;
+    private String password;
+
+    private List<Role> roleList;
+    private List<OrderInfo> orderInfoList;
+
+    public Integer getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Integer userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public List<Role> getRoleList() {
+        return roleList;
+    }
+
+    public void setRoleList(List<Role> roleList) {
+        this.roleList = roleList;
+    }
+
+    public List<OrderInfo> getOrderInfoList() {
+        return orderInfoList;
+    }
+
+    public void setOrderInfoList(List<OrderInfo> orderInfoList) {
+        this.orderInfoList = orderInfoList;
+    }
+
+    @Override
+    public String toString() {
+        return "UserInfo{" +
+                "userId=" + userId +
+                ", userName='" + userName + '\'' +
+                ", password='" + password + '\'' +
+                ", roleList=" + roleList +
+                ", orderInfoList=" + orderInfoList +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserOrder.java

@@ -0,0 +1,48 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Table;
+
+/**
+ * 用户订单映射。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@Table("tb_user_order")
+public class UserOrder {
+
+    private Integer userId;
+    private Integer orderId;
+
+    public Integer getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Integer userId) {
+        this.userId = userId;
+    }
+
+    public Integer getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(Integer orderId) {
+        this.orderId = orderId;
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserRole.java

@@ -0,0 +1,48 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import com.mybatisflex.annotation.Table;
+
+/**
+ * 用户与角色连接表。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@Table("tb_user_role")
+public class UserRole {
+
+    private Integer userId;
+    private Integer roleId;
+
+    public Integer getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Integer userId) {
+        this.userId = userId;
+    }
+
+    public Integer getRoleId() {
+        return roleId;
+    }
+
+    public void setRoleId(Integer roleId) {
+        this.roleId = roleId;
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserVO.java

@@ -0,0 +1,66 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import java.util.List;
+
+/**
+ * 用户 VO 对象。
+ *
+ * @author 王帅
+ * @since 2023-06-07
+ */
+
+public class UserVO {
+
+    private String userId;
+    private String userName;
+    private List<Role> roleList;
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public void setUserId(String userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public List<Role> getRoleList() {
+        return roleList;
+    }
+
+    public void setRoleList(List<Role> roleList) {
+        this.roleList = roleList;
+    }
+
+    @Override
+    public String toString() {
+        return "UserVO{" +
+                "userId='" + userId + '\'' +
+                ", userName='" + userName + '\'' +
+                ", roleList=" + roleList +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserVO1.java

@@ -0,0 +1,74 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+import java.util.List;
+
+/**
+ * @author 王帅
+ * @since 2023-06-07
+ */
+
+public class UserVO1 {
+
+    private String userId;
+    private String userName;
+    private List<Role> roleList;
+    private Role role;
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public void setUserId(String userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public List<Role> getRoleList() {
+        return roleList;
+    }
+
+    public void setRoleList(List<Role> roleList) {
+        this.roleList = roleList;
+    }
+
+    public Role getRole() {
+        return role;
+    }
+
+    public void setRole(Role role) {
+        this.role = role;
+    }
+
+    @Override
+    public String toString() {
+        return "UserVO1{" +
+                "userId='" + userId + '\'' +
+                ", userName='" + userName + '\'' +
+                ", roleList=" + roleList +
+                ", role=" + role +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserVO2.java

@@ -0,0 +1,62 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+/**
+ * @author 王帅
+ * @since 2023-06-07
+ */
+
+public class UserVO2 {
+
+    private String userId;
+    private String userName;
+    private Role role;
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public void setUserId(String userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public Role getRole() {
+        return role;
+    }
+
+    public void setRole(Role role) {
+        this.role = role;
+    }
+
+    @Override
+    public String toString() {
+        return "UserVO2{" +
+                "userId='" + userId + '\'' +
+                ", userName='" + userName + '\'' +
+                ", role=" + role +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/java/com/mybatisflex/test/model/UserVO3.java

@@ -0,0 +1,82 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.model;
+
+/**
+ * @author 王帅
+ * @since 2023-06-07
+ */
+
+public class UserVO3 {
+
+    private String userId;
+    private String userName;
+    private Integer roleId;
+    private String roleKey;
+    private String roleName;
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public void setUserId(String userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public Integer getRoleId() {
+        return roleId;
+    }
+
+    public void setRoleId(Integer roleId) {
+        this.roleId = roleId;
+    }
+
+    public String getRoleKey() {
+        return roleKey;
+    }
+
+    public void setRoleKey(String roleKey) {
+        this.roleKey = roleKey;
+    }
+
+    public String getRoleName() {
+        return roleName;
+    }
+
+    public void setRoleName(String roleName) {
+        this.roleName = roleName;
+    }
+
+    @Override
+    public String toString() {
+        return "UserVO3{" +
+                "userId='" + userId + '\'' +
+                ", userName='" + userName + '\'' +
+                ", roleId=" + roleId +
+                ", roleKey='" + roleKey + '\'' +
+                ", roleName='" + roleName + '\'' +
+                '}';
+    }
+}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/resources/application.yml

@@ -1,16 +1,17 @@
 # DataSource Config
 spring:
-  h2:
+#  h2:
-    console:
+#    console:
-      enabled: true
+#      enabled: true
   datasource:
-    driver-class-name: org.h2.Driver
+    driver-class-name: com.mysql.cj.jdbc.Driver
-    username: sa
+    url: jdbc:mysql://localhost:3306/mp_test
-    password:
+    username: root
-  sql:
+    password: 12345678
-    init:
+#  sql:
-      schema-locations: classpath:schema.sql
+#    init:
-      data-locations: classpath:data.sql
+#      schema-locations: classpath:schema.sql
+#      data-locations: classpath:data.sql
 mybatis-flex:
   mapper-locations:
     - classpath*:/mapper/*.xml

mybatis-flex-test/mybatis-flex-spring-boot-test/src/main/resources/mapper/accountMapper.xml

@@ -2,6 +2,21 @@
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
 <mapper namespace="com.mybatisflex.test.mapper.MyAccountMapper">
 
+<!--    <resultMap id="testResultMap" type="com.mybatisflex.test.model.UserVO">-->
+<!--        <id column="user_id" property="userId"/>-->
+<!--        <result column="user_name" property="userName"/>-->
+<!--        <collection property="roleList" ofType="com.mybatisflex.test.model.Role">-->
+<!--            <id column="role_id" property="roleId"/>-->
+<!--            <result column="role_key" property="roleKey"/>-->
+<!--            <result column="role_name" property="roleName"/>-->
+<!--        </collection>-->
+<!--        <association property="role" javaType="com.mybatisflex.test.model.Role">-->
+<!--            <id column="role_id" property="roleId"/>-->
+<!--            <result column="role_key" property="roleKey"/>-->
+<!--            <result column="role_name" property="roleName"/>-->
+<!--        </association>-->
+<!--    </resultMap>-->
+
     <!-- selectByName -->
     <select id="selectByName" resultType="com.mybatisflex.test.model.Account">
         select * from `tb_account` where `user_name` = #{name}

mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/mapper/UserMapperTest.java

@@ -0,0 +1,94 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.mybatisflex.test.mapper;
+
+import com.mybatisflex.core.query.QueryWrapper;
+import com.mybatisflex.test.model.UserInfo;
+import com.mybatisflex.test.model.UserVO1;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.List;
+
+import static com.mybatisflex.test.model.table.GoodTableDef.GOOD;
+import static com.mybatisflex.test.model.table.OrderGoodTableDef.ORDER_GOOD;
+import static com.mybatisflex.test.model.table.OrderTableDef.ORDER;
+import static com.mybatisflex.test.model.table.RoleTableDef.ROLE;
+import static com.mybatisflex.test.model.table.UserOrderTableDef.USER_ORDER;
+import static com.mybatisflex.test.model.table.UserRoleTableDef.USER_ROLE;
+import static com.mybatisflex.test.model.table.UserTableDef.USER;
+
+/**
+ * @author 王帅
+ * @since 2023-06-07
+ */
+@SpringBootTest
+class UserMapperTest {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    @Test
+    void testSelectOne() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select(USER.USER_ID, USER.USER_NAME, ROLE.ALL_COLUMNS)
+                .from(USER.as("u"))
+                .leftJoin(USER_ROLE).as("ur").on(USER_ROLE.USER_ID.eq(USER.USER_ID))
+                .leftJoin(ROLE).as("r").on(USER_ROLE.ROLE_ID.eq(ROLE.ROLE_ID))
+                .where(USER.USER_ID.eq(3));
+        System.out.println(queryWrapper.toSQL());
+//        UserVO userVO = userMapper.selectListByQueryAs(queryWrapper, UserVO.class);
+        UserVO1 userVO = userMapper.selectOneByQueryAs(queryWrapper, UserVO1.class);
+//        UserVO2 userVO = userMapper.selectListByQueryAs(queryWrapper, UserVO2.class);
+//        UserVO3 userVO = userMapper.selectListByQueryAs(queryWrapper, UserVO3.class);
+        System.err.println(userVO);
+    }
+
+    @Test
+    void testSelectList() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select(USER.USER_ID, USER.USER_NAME, ROLE.ALL_COLUMNS)
+                .from(USER.as("u"))
+                .leftJoin(USER_ROLE).as("ur").on(USER_ROLE.USER_ID.eq(USER.USER_ID))
+                .leftJoin(ROLE).as("r").on(USER_ROLE.ROLE_ID.eq(ROLE.ROLE_ID))
+                .where(USER.USER_ID.ge(2));
+        System.out.println(queryWrapper.toSQL());
+//        List<UserVO> userVOS = userMapper.selectListByQueryAs(queryWrapper, UserVO.class);
+        List<UserVO1> userVOS = userMapper.selectListByQueryAs(queryWrapper, UserVO1.class);
+//        List<UserVO2> userVOS = userMapper.selectListByQueryAs(queryWrapper, UserVO2.class);
+//        List<UserVO3> userVOS = userMapper.selectListByQueryAs(queryWrapper, UserVO3.class);
+        userVOS.forEach(System.err::println);
+    }
+
+    @Test
+    void testComplexSelectList() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select(USER.ALL_COLUMNS, ROLE.ALL_COLUMNS, ORDER.ALL_COLUMNS, GOOD.ALL_COLUMNS)
+                .from(USER.as("u"))
+                .leftJoin(USER_ROLE).as("ur").on(USER.USER_ID.eq(USER_ROLE.USER_ID))
+                .leftJoin(ROLE).as("r").on(ROLE.ROLE_ID.eq(USER_ROLE.ROLE_ID))
+                .leftJoin(USER_ORDER).as("uo").on(USER.USER_ID.eq(USER_ORDER.USER_ID))
+                .leftJoin(ORDER).as("o").on(ORDER.ORDER_ID.eq(USER_ORDER.ORDER_ID))
+                .leftJoin(ORDER_GOOD).as("og").on(ORDER.ORDER_ID.eq(ORDER_GOOD.ORDER_ID))
+                .leftJoin(GOOD).as("g").on(GOOD.GOOD_ID.eq(ORDER_GOOD.GOOD_ID));
+        System.err.println(queryWrapper.toSQL());
+        List<UserInfo> userInfos = userMapper.selectListByQueryAs(queryWrapper, UserInfo.class);
+        userInfos.forEach(System.err::println);
+    }
+
+}