feat: 优化 ResultMap 构建，又双叒叕处理重名问题。

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

@@ -15,7 +15,11 @@
  */
 package com.mybatisflex.core.table;
 
-import com.mybatisflex.annotation.*;
+import com.mybatisflex.annotation.Column;
+import com.mybatisflex.annotation.InsertListener;
+import com.mybatisflex.annotation.KeyType;
+import com.mybatisflex.annotation.SetListener;
+import com.mybatisflex.annotation.UpdateListener;
 import com.mybatisflex.core.FlexConsts;
 import com.mybatisflex.core.FlexGlobalConfig;
 import com.mybatisflex.core.constant.SqlConsts;
@@ -25,12 +29,30 @@ import com.mybatisflex.core.exception.FlexExceptions;
 import com.mybatisflex.core.exception.locale.LocalizedFormats;
 import com.mybatisflex.core.logicdelete.LogicDeleteManager;
 import com.mybatisflex.core.mybatis.TypeHandlerObject;
-import com.mybatisflex.core.query.*;
+import com.mybatisflex.core.query.CPI;
+import com.mybatisflex.core.query.Join;
+import com.mybatisflex.core.query.QueryColumn;
+import com.mybatisflex.core.query.QueryCondition;
+import com.mybatisflex.core.query.QueryMethods;
+import com.mybatisflex.core.query.QueryTable;
+import com.mybatisflex.core.query.QueryWrapper;
+import com.mybatisflex.core.query.SelectQueryColumn;
+import com.mybatisflex.core.query.SelectQueryTable;
+import com.mybatisflex.core.query.SqlOperators;
+import com.mybatisflex.core.query.UnionWrapper;
 import com.mybatisflex.core.row.Row;
 import com.mybatisflex.core.tenant.TenantManager;
 import com.mybatisflex.core.update.RawValue;
 import com.mybatisflex.core.update.UpdateWrapper;
-import com.mybatisflex.core.util.*;
+import com.mybatisflex.core.util.ArrayUtil;
+import com.mybatisflex.core.util.ClassUtil;
+import com.mybatisflex.core.util.CollectionUtil;
+import com.mybatisflex.core.util.ConvertUtil;
+import com.mybatisflex.core.util.EnumWrapper;
+import com.mybatisflex.core.util.FieldWrapper;
+import com.mybatisflex.core.util.ObjectUtil;
+import com.mybatisflex.core.util.SqlUtil;
+import com.mybatisflex.core.util.StringUtil;
 import org.apache.ibatis.mapping.ResultFlag;
 import org.apache.ibatis.mapping.ResultMap;
 import org.apache.ibatis.mapping.ResultMapping;
@@ -45,11 +67,25 @@ import java.lang.reflect.Field;
 import java.lang.reflect.Proxy;
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.StringJoiner;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
-import static com.mybatisflex.core.constant.SqlConsts.*;
+import static com.mybatisflex.core.constant.SqlConsts.AND;
+import static com.mybatisflex.core.constant.SqlConsts.EQUALS_PLACEHOLDER;
+import static com.mybatisflex.core.constant.SqlConsts.IN;
 
 public class TableInfo {
 
@@ -989,10 +1025,20 @@ public class TableInfo {
 
 
     public ResultMap buildResultMap(Configuration configuration) {
-        return doBuildResultMap(configuration, new HashSet<>(), false, getTableNameWithSchema());
+        // 所有的嵌套类对象引用
+        Stream<Class<?>> ct = collectionType == null ? Stream.empty() : collectionType.values().stream();
+        Stream<Class<?>> at = associationType == null ? Stream.empty() : associationType.values().stream();
+
+        // 预加载所有的列，重复列去重
+        Set<String> existedColumns = Stream.concat(at, ct)
+            .map(TableInfoFactory::ofEntityClass)
+            .flatMap(e -> Arrays.stream(e.allColumns))
+            .collect(Collectors.toSet());
+
+        return doBuildResultMap(configuration, new HashSet<>(), existedColumns, false, getTableNameWithSchema());
     }
 
-    private ResultMap doBuildResultMap(Configuration configuration, Set<String> resultMapIds, boolean isNested, String nestedPrefix) {
+    private ResultMap doBuildResultMap(Configuration configuration, Set<String> resultMapIds, Set<String> existedColumns, boolean isNested, String nestedPrefix) {
 
         String resultMapId = isNested ? "nested-" + nestedPrefix + ":" + entityClass.getName() : entityClass.getName();
 
@@ -1012,12 +1058,12 @@ public class TableInfo {
 
         // <resultMap> 标签下的 <id> 标签映射
         for (IdInfo idInfo : primaryKeyList) {
-            doBuildColumnResultMapping(configuration, resultMappings, idInfo, CollectionUtil.newArrayList(ResultFlag.ID));
+            doBuildColumnResultMapping(configuration, resultMappings, existedColumns, idInfo, CollectionUtil.newArrayList(ResultFlag.ID), isNested);
         }
 
         // <resultMap> 标签下的 <result> 标签映射
         for (ColumnInfo columnInfo : columnInfoList) {
-            doBuildColumnResultMapping(configuration, resultMappings, columnInfo, Collections.emptyList());
+            doBuildColumnResultMapping(configuration, resultMappings, existedColumns, columnInfo, Collections.emptyList(), isNested);
         }
 
         // <resultMap> 标签下的 <association> 标签映射
@@ -1026,7 +1072,7 @@ public class TableInfo {
                 // 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
-                ResultMap nestedResultMap = tableInfo.doBuildResultMap(configuration, resultMapIds, true, nestedPrefix);
+                ResultMap nestedResultMap = tableInfo.doBuildResultMap(configuration, resultMapIds, existedColumns, true, nestedPrefix);
                 if (nestedResultMap != null) {
                     resultMappings.add(new ResultMapping.Builder(configuration, fieldName)
                         .javaType(fieldType)
@@ -1059,7 +1105,7 @@ public class TableInfo {
                     // 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
-                    ResultMap nestedResultMap = tableInfo.doBuildResultMap(configuration, resultMapIds, true, nestedPrefix);
+                    ResultMap nestedResultMap = tableInfo.doBuildResultMap(configuration, resultMapIds, existedColumns, true, nestedPrefix);
                     if (nestedResultMap != null) {
                         resultMappings.add(new ResultMapping.Builder(configuration, field.getName())
                             .javaType(field.getType())
@@ -1077,8 +1123,9 @@ public class TableInfo {
     }
 
     private void doBuildColumnResultMapping(Configuration configuration, List<ResultMapping> resultMappings
-        , ColumnInfo columnInfo, List<ResultFlag> flags) {
+        , Set<String> existedColumns, ColumnInfo columnInfo, List<ResultFlag> flags, boolean isNested) {
 
+        if (!isNested) {
             // userName -> user_name
             resultMappings.add(new ResultMapping.Builder(configuration
                 , columnInfo.property
@@ -1088,7 +1135,9 @@ public class TableInfo {
                 .flags(flags)
                 .typeHandler(columnInfo.buildTypeHandler(configuration))
                 .build());
+        }
 
+        if (existedColumns.contains(columnInfo.column)) {
             // userName -> tb_user$user_name
             resultMappings.add(new ResultMapping.Builder(configuration
                 , columnInfo.property
@@ -1098,6 +1147,7 @@ public class TableInfo {
                 .flags(flags)
                 .typeHandler(columnInfo.buildTypeHandler(configuration))
                 .build());
+        }
 
         if (!Objects.equals(columnInfo.column, columnInfo.property)) {
             // userName -> userName

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

@@ -17,13 +17,16 @@
 package com.mybatisflex.test.mapper;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.mybatisflex.core.FlexGlobalConfig;
 import com.mybatisflex.core.query.QueryWrapper;
 import com.mybatisflex.test.alisa.SysUser;
+import org.apache.ibatis.mapping.ResultMap;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.util.Arrays;
 import java.util.List;
 
 import static com.mybatisflex.core.query.QueryMethods.column;
@@ -120,12 +123,25 @@ class AlisaTest {
     void test06() {
         QueryWrapper queryWrapper = QueryWrapper.create()
             // SELECT 里没有重名列 例如：id
-            // 不指定别名会映射到嵌套对象里面去
             .select(SYS_USER.ID, SYS_USER.USER_NAME, SYS_USER.AGE, SYS_USER.BIRTHDAY)
             .select(SYS_ROLE.CREATE_BY.as("sys_role$create_by"))
             .from(SYS_USER.as("u"))
             .leftJoin(SYS_ROLE).as("r").on(SYS_USER.ID.eq(SYS_ROLE.ID));
 
+        Object[] objects = FlexGlobalConfig.getDefaultConfig()
+            .getConfiguration()
+            .getResultMaps()
+            .toArray();
+
+        Object[] resultMaps = Arrays.stream(objects)
+            .filter(e -> e instanceof ResultMap)
+            .map(e -> (ResultMap) e)
+            .filter(e -> e.getId().contains("Sys"))
+            .filter(e -> !e.getId().contains("select"))
+            .toArray();
+
+        System.out.println(resultMaps.length);
+
         printList(queryWrapper);
     }