code style

mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/handlers/CompositeEnumTypeHandler.java

@@ -16,7 +16,6 @@
 package com.baomidou.mybatisplus.core.handlers;
 
 import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
-import lombok.Setter;
 import org.apache.ibatis.type.EnumTypeHandler;
 import org.apache.ibatis.type.JdbcType;
 import org.apache.ibatis.type.TypeException;
@@ -37,7 +36,6 @@ import java.util.concurrent.ConcurrentHashMap;
 public class CompositeEnumTypeHandler<E extends Enum<E>> implements TypeHandler<E> {
 
     private static final Map<Class<?>, Boolean> MP_ENUM_CACHE = new ConcurrentHashMap<>();
-    @Setter
     private static Class<? extends TypeHandler> defaultEnumTypeHandler = EnumTypeHandler.class;
     private final TypeHandler<E> delegate;
 
@@ -52,6 +50,12 @@ public class CompositeEnumTypeHandler<E extends Enum<E>> implements TypeHandler<
         }
     }
 
+    public static void setDefaultEnumTypeHandler(Class<? extends TypeHandler> defaultEnumTypeHandler) {
+        if (defaultEnumTypeHandler != null && !MybatisEnumTypeHandler.class.isAssignableFrom(defaultEnumTypeHandler)) {
+            CompositeEnumTypeHandler.defaultEnumTypeHandler = defaultEnumTypeHandler;
+        }
+    }
+
     @Override
     public void setParameter(PreparedStatement ps, int i, E parameter, JdbcType jdbcType) throws SQLException {
         delegate.setParameter(ps, i, parameter, jdbcType);

mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/handlers/MybatisEnumTypeHandler.java

@@ -46,7 +46,7 @@ import java.util.concurrent.ConcurrentHashMap;
  * @author hubin
  * @since 2017-10-11
  */
-public class MybatisEnumTypeHandler<E extends Enum<E>> extends BaseTypeHandler<E> {
+public final class MybatisEnumTypeHandler<E extends Enum<E>> extends BaseTypeHandler<E> {
 
     private static final Map<String, String> TABLE_METHOD_OF_ENUM_TYPES = new ConcurrentHashMap<>();
     private static final ReflectorFactory REFLECTOR_FACTORY = new DefaultReflectorFactory();