mybatis返回key value map集合方式
作者:HQZYX
这篇文章主要介绍了mybatis返回key value map集合方式,具有很好的参考价值,希望对大家有所帮助。如有错误或未考虑完全的地方,望不吝赐教
mybatis返回key value map集合
XML:文件
<select id="getData" resultMap="userMap" > SELECT id,name FROM user </select> <resultMap id="userMap" type="java.util.Map" > <result column="id" property="key" jdbcType="VARCHAR" /> <result column="name" property="value" jdbcType="VARCHAR" /> </resultMap>
Service实现类: namespaceXml根据自己xml命名取
import org.apache.ibatis.session.SqlSession;
@Autowired
private SqlSession sqlSession;
public Map<String, String> getBasicInformationOfCompanyPersonnel(String status) throws Exception {
Map<String, Object> params = new HashMap<>();
params.put("status", status);
MapResultHandler handler = new MapResultHandler();
Map result = handler.getMappedResults();
sqlSession.select("namespaceXml.getData",params,handler);
return result;
}工具类:
import org.apache.ibatis.session.ResultContext;
import org.apache.ibatis.session.ResultHandler;
public class MapResultHandler implements ResultHandler {
@SuppressWarnings("rawtypes")
private final Map mappedResults = new HashMap();
@SuppressWarnings("unchecked")
@Override
public void handleResult(ResultContext context) {
@SuppressWarnings("rawtypes")
Map map = (Map) context.getResultObject();
// xml配置里面的property的值,对应的列
mappedResults.put(map.get("key"), map.get("value"));
}
@SuppressWarnings("rawtypes")
public Map getMappedResults() {
return mappedResults;
}
}mybatis返回map,key为主键,value为对象
@MapKey("id")
public Map<String,User> getUserByName(String name);xml中
<select id="getUserByName" resultType = "User">
select * from user where name=#{param1}
</select>以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。
