Mybatis返回map自动转驼峰

亦凉 2022-05-25 22:29 554阅读 0赞

## 配置 ##

MapWrapper.java
    
    import com.google.common.base.CaseFormat;
    import org.apache.ibatis.reflection.MetaObject;
    import org.apache.ibatis.reflection.wrapper.MapWrapper;
    
    import java.util.Map;
    
    public class CustomWrapper extends MapWrapper { 
    
    
        public CustomWrapper(MetaObject metaObject, Map<String, Object> map) {
            super(metaObject, map);
        }
    
        @Override
        public String findProperty(String name, boolean useCamelCaseMapping) {
            if(useCamelCaseMapping){
               return CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL,name);
            }
            return name;
        }
    }

ObjectWrapperFactory.java
    
    import org.apache.ibatis.reflection.MetaObject;
    import org.apache.ibatis.reflection.wrapper.ObjectWrapper;
    import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
    
    import java.util.Map;
    
    public class MapWrapperFactory implements ObjectWrapperFactory{ 
    
        @Override
        public boolean hasWrapperFor(Object object) {
            return object != null && object instanceof Map;
        }
    
        @Override
        public ObjectWrapper getWrapperFor(MetaObject metaObject, Object object) {
            return new CustomWrapper(metaObject,(Map)object);
        }
    }

mybatis-config.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        <settings>
            <setting name="callSettersOnNulls" value="true"/>
            
            <setting name="mapUnderscoreToCamelCase" value="true"/>
        </settings>
    </configuration>

<bean id="lotterySqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            <property name="configLocation" value="classpath:spring/mybatis-config.xml"/>
            <property name="mapperLocations" value>classpath:mapping/*.xml </property>
            
            <property name="objectWrapperFactory" ref="mapWrapperFactory" />
        </bean>

## 配置完成，跑一遍看效果!!! ##