add: 添加主键生成的全局配置，可以不用为每个 entity 单独配置

mybatis-flex-annotation/src/main/java/com/mybatisflex/annotation/Id.java

@@ -29,7 +29,7 @@ public @interface Id {
      *
      * @return 生成策略
      */
-    KeyType keyType() default KeyType.Auto;
+    KeyType keyType() default KeyType.None;
 
     /**
      * 若 keyType 类型是 sequence， value 则代表的是

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

@@ -16,6 +16,8 @@
 package com.mybatisflex.core;
 
 import com.mybatisflex.core.dialect.DbType;
+import com.mybatisflex.core.enums.KeyType;
+import org.apache.ibatis.session.Configuration;
 import org.apache.ibatis.session.SqlSessionFactory;
 
 import java.util.concurrent.ConcurrentHashMap;
@@ -36,6 +38,12 @@ public class FlexGlobalConfig {
     private SqlSessionFactory sqlSessionFactory;
 
 
+    /**
+     * 全局的 ID 生成策略配置，当 @Id 未配置 或者 配置 KeyType 为 None 时
+     * 使用当前全局配置
+     */
+    private KeyConfig keyConfig;
+
 
     public DbType getDbType() {
         return dbType;
@@ -53,6 +61,47 @@ public class FlexGlobalConfig {
         this.sqlSessionFactory = sqlSessionFactory;
     }
 
+    public KeyConfig getKeyConfig() {
+        return keyConfig;
+    }
+
+    public void setKeyConfig(KeyConfig keyConfig) {
+        this.keyConfig = keyConfig;
+    }
+
+    /**
+     * 对应的是 注解 {@link com.mybatisflex.annotation.Id} 的配置
+     */
+    public static class KeyConfig {
+        private KeyType keyType;
+        private String value;
+        private boolean before = true;
+
+        public KeyType getKeyType() {
+            return keyType;
+        }
+
+        public void setKeyType(KeyType keyType) {
+            this.keyType = keyType;
+        }
+
+        public String getValue() {
+            return value;
+        }
+
+        public void setValue(String value) {
+            this.value = value;
+        }
+
+        public boolean isBefore() {
+            return before;
+        }
+
+        public void setBefore(boolean before) {
+            this.before = before;
+        }
+    }
+
 
     /////static factory methods/////
     private static ConcurrentHashMap<String, FlexGlobalConfig> globalConfigs = new ConcurrentHashMap();
@@ -66,6 +115,10 @@ public class FlexGlobalConfig {
         defaultConfig = config;
     }
 
+    public static FlexGlobalConfig getConfig(Configuration configuration) {
+        return globalConfigs.get(configuration.getEnvironment().getId());
+    }
+    
     public static FlexGlobalConfig getConfig(String environmentId) {
         return globalConfigs.get(environmentId);
     }

mybatis-flex-core/src/main/java/com/mybatisflex/core/key/CustomKeyGenerator.java

@@ -16,6 +16,7 @@
 package com.mybatisflex.core.key;
 
 import com.mybatisflex.core.FlexConsts;
+import com.mybatisflex.core.FlexGlobalConfig;
 import com.mybatisflex.core.exception.FlexExceptions;
 import com.mybatisflex.core.table.IdInfo;
 import com.mybatisflex.core.table.TableInfo;
@@ -44,7 +45,9 @@ public class CustomKeyGenerator implements KeyGenerator {
 
     public CustomKeyGenerator(Configuration configuration, TableInfo tableInfo, IdInfo idInfo) {
         this.configuration = configuration;
-        this.keyGenerator = KeyGeneratorFactory.getKeyGenerator(idInfo.getValue());
+        FlexGlobalConfig.KeyConfig globalKeyConfig = FlexGlobalConfig.getConfig(configuration).getKeyConfig();
+        String keyValue = MybatisKeyGeneratorUtil.getKeyValue(idInfo, globalKeyConfig);
+        this.keyGenerator = KeyGeneratorFactory.getKeyGenerator(keyValue);
         this.tableInfo = tableInfo;
         this.idInfo = idInfo;
 

mybatis-flex-core/src/main/java/com/mybatisflex/core/key/MybatisKeyGeneratorUtil.java

@@ -16,6 +16,7 @@
 package com.mybatisflex.core.key;
 
 import com.mybatisflex.core.FlexConsts;
+import com.mybatisflex.core.FlexGlobalConfig;
 import com.mybatisflex.core.enums.KeyType;
 import com.mybatisflex.core.exception.FlexExceptions;
 import com.mybatisflex.core.table.IdInfo;
@@ -53,22 +54,25 @@ public class MybatisKeyGeneratorUtil {
 
 
     public static KeyGenerator createIdKeyGenerator(TableInfo tableInfo, MappedStatement ms, IdInfo idInfo) {
-        if (idInfo.getKeyType() == KeyType.None) {
+        FlexGlobalConfig.KeyConfig globalKeyConfig = FlexGlobalConfig.getConfig(ms.getConfiguration()).getKeyConfig();
+        KeyType keyType = getKeyType(idInfo, globalKeyConfig);
+
+        if (keyType == KeyType.None) {
             return NoKeyGenerator.INSTANCE;
         }
 
         //自增主键
-        if (idInfo.getKeyType() == KeyType.Auto) {
+        if (keyType == KeyType.Auto) {
             return Jdbc3KeyGenerator.INSTANCE;
         }
 
         //通过 java 生成的主键
-        if (idInfo.getKeyType() == KeyType.Generator) {
+        if (keyType == KeyType.Generator) {
             return new CustomKeyGenerator(ms.getConfiguration(), tableInfo, idInfo);
         }
 
         //通过序列生成的注解
-        String sequence = idInfo.getValue();
+        String sequence = getKeyValue(idInfo, globalKeyConfig);
         if (StringUtil.isBlank(sequence)) {
             throw FlexExceptions.wrap("please config @Id(value=\"...\") for field: %s in class: %s"
                     , idInfo.getProperty()
@@ -103,8 +107,7 @@ public class MybatisKeyGeneratorUtil {
         //因为只有在 xml 解析的时候，才可能存在多一个 MappedStatement 拥有同一个 keyGenerator 的情况
         //当前每个方法都拥有一个自己的 keyGenerator 了，没必要添加
         //this.addKeyGenerator(selectId, keyGenerator);
-
+        return new SelectKeyGenerator(keyMappedStatement, isKeyBefore(idInfo, globalKeyConfig));
-        return new SelectKeyGenerator(keyMappedStatement, idInfo.isBefore());
     }
 
 
@@ -115,4 +118,40 @@ public class MybatisKeyGeneratorUtil {
         return Arrays.asList(resultMap);
     }
 
+
+    /**
+     * 获取主键的 keyType，优先通过 @id 获取，获取不到通过全局配置获取
+     */
+    public static KeyType getKeyType(IdInfo idInfo, FlexGlobalConfig.KeyConfig keyConfig) {
+        KeyType keyType = idInfo.getKeyType();
+        if (keyType != KeyType.None) {
+            return keyType;
+        }
+
+        if (keyConfig != null) {
+            return keyConfig.getKeyType();
+        }
+
+        return keyType;
+    }
+
+
+    public static String getKeyValue(IdInfo idInfo, FlexGlobalConfig.KeyConfig keyConfig) {
+        String value = idInfo.getValue();
+        if (StringUtil.isBlank(value)) {
+            value = keyConfig.getValue();
+        }
+        return value;
+    }
+
+
+    public static boolean isKeyBefore(IdInfo idInfo, FlexGlobalConfig.KeyConfig keyConfig) {
+        Boolean before = idInfo.getBefore();
+        if (before == null) {
+            return keyConfig.isBefore();
+        } else {
+            return before;
+        }
+    }
+
 }

mybatis-flex-core/src/main/java/com/mybatisflex/core/row/RowMapperInvoker.java

@@ -38,7 +38,7 @@ public class RowMapperInvoker {
 
     public RowMapperInvoker(SqlSessionFactory sqlSessionFactory) {
         this.sqlSessionFactory = sqlSessionFactory;
-        this.dbType = FlexGlobalConfig.getConfig(sqlSessionFactory.getConfiguration().getEnvironment().getId()).getDbType();
+        this.dbType = FlexGlobalConfig.getConfig(sqlSessionFactory.getConfiguration()).getDbType();
     }
 
     public RowSessionManager getRowSessionManager() {

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

@@ -23,7 +23,7 @@ public class IdInfo extends ColumnInfo {
     /**
      * id 生成策略
      */
-    private KeyType keyType;
+    private KeyType keyType  = KeyType.None;
 
     /**
      * 若 keyType 类型是 sequence， value 则代表的是
@@ -40,7 +40,7 @@ public class IdInfo extends ColumnInfo {
      *
      * @see org.apache.ibatis.executor.keygen.SelectKeyGenerator
      */
-    private boolean before;
+    private Boolean before;
 
 
     public IdInfo(ColumnInfo columnInfo) {
@@ -81,11 +81,11 @@ public class IdInfo extends ColumnInfo {
         this.value = value;
     }
 
-    public boolean isBefore() {
+    public Boolean getBefore() {
         return before;
     }
 
-    public void setBefore(boolean before) {
+    public void setBefore(Boolean before) {
         this.before = before;
     }
 }

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

@@ -228,7 +228,7 @@ public class TableInfo {
             IdInfo idInfo = primaryKeyList.get(i);
             primaryKeys[i] = idInfo.getColumn();
 
-            if (idInfo.getKeyType() != KeyType.Auto && idInfo.isBefore()) {
+            if (idInfo.getKeyType() != KeyType.Auto || (idInfo.getBefore() != null && idInfo.getBefore())) {
                 insertIdFields.add(idInfo.getColumn());
             }