mapper.xml select 查詢返回map，字段一為key，字段二為value

直接resultType 可以為map 但是 是以查詢的字段作為key， 值為value，有時候想讓值為key-value，所以還是有缺陷

 

編寫select 普通查詢語句

    <select id="findOrderWaitissue" parameterType="list" resultMap="getAllSetDaysResult">
        SELECT FPQQLSH SP_FPARAMEKEY,GROUP_CONCAT(ddh) SP_FPARAMEVALUE FROM `t_inv_orders_waitissue`
        where FPQQLSH in
         <foreach collection="list" item="item" separator="," open="(" close=")">
             #{item.fpqqlsh}
         </foreach>
          GROUP BY FPQQLSH
    </select>

定義resultMap ，在里面對字段設置key，value

    <resultMap id="getAllSetDaysResult"   type="HashMap">
        <result property="key" column="SP_FPARAMEKEY" />
        <result property="value" column="SP_FPARAMEVALUE" />

    </resultMap>

 

創建二配置個類

package com.cqaisino.newbill.common.handler;

import java.util.List;
import java.util.Map;

import javax.annotation.Resource;

import com.cqaisino.newbill.output.entity.InvInvoiceExcel;
import com.cqaisino.newbill.output.mapper.InvInvoiceMapper;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import org.springframework.stereotype.Repository;

@Repository
public class SessionMapper extends SqlSessionDaoSupport {

    @Resource
    public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
        super.setSqlSessionFactory(sqlSessionFactory);
    }

    /**
     * @return
     */
    @SuppressWarnings("unchecked")
    public Map<String,Object> findOrderWaitissue(List<InvInvoiceExcel> invInvoiceExcels){
        FblMapResultHandler handler = new FblMapResultHandler();
        //namespace : XxxMapper.xml 中配置的地址（XxxMapper.xml的qualified name）
        //.selectXxxxNum : XxxMapper.xml 中配置的方法名稱
        //this.getSqlSession().select(namespace+".selectXxxxNum", handler);
        this.getSqlSession().select(InvInvoiceMapper.class.getName()+".findOrderWaitissue",invInvoiceExcels, handler);
        Map<String, Object> map = handler.getMappedResults();  
        return map;
    }
}

 

 

package com.cqaisino.newbill.common.handler;

import org.apache.ibatis.session.ResultContext;
import org.apache.ibatis.session.ResultHandler;

import java.util.HashMap;
import java.util.Map;

public class FblMapResultHandler 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(); 
        mappedResults.put(map.get("key"), map.get("value"));  // xml 配置里面的property的值，對應的列
    }
    public Map getMappedResults() {  
        return mappedResults;  
    }  
}

 

然后直接注入mapper  使用

    @Autowired
    private SessionMapper invoiceMapMapper;

        Map<String, Object> orderWaitissue = this.invoiceMapMapper.findOrderWaitissue(invInvoiceExcels);