MyBatis 查询返回map中key默认大写改小写解决方案_mabatis返回map key变小写-优快云博客

本文链接：https://blog.youkuaiyun.com/ToBe_Coder/article/details/103928687

本文介绍如何在Mybatis中将查询语句返回的Map中所有Key值转换为小写，通过自定义包装器和配置，实现统一的字段名大小写规范。

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Mybatis 查询语句返回 map，key 值默为大写，将其全部改成小写解决方案：

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) {
        return name==null?"":name.toLowerCase() ;

    }
}

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);
    }
}

import org.mybatis.spring.boot.autoconfigure.ConfigurationCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MybatisConfig {

    @Bean
    public ConfigurationCustomizer mybatisConfigurationCustomizer(){
        return new ConfigurationCustomizer() {
            @Override
            public void customize(org.apache.ibatis.session.Configuration configuration) {
                configuration.setObjectWrapperFactory(new MapWrapperFactory());
            }
        };
    }

}