架构师之mybatis-----传入传出多个参数,都是map或list,批量更新

1.前言.
   如题.
2.代码.
(1)mapper.xml.

	<select id="getTest" resultType="java.util.HashMap" parameterType="java.util.HashMap" >
           select count(1) as c1,userid as c2 from  test where insertime  <![CDATA[>=]]> #{beginTime,jdbcType=TIMESTAMP} and insertime <![CDATA[<]]> #{endTime,jdbcType=TIMESTAMP} group by  userid 
    </select>

(2)interface

public interface TestMapper{

	List<Map<String,Object>> getTest(Map<String,Object> map);
}

(3)
测试类:

	@Test
	public void test3(){
		SimpleDateFormat sf=new SimpleDateFormat("yyyyMMddHH");
		Date d1 = null;
		try {
			d1 = sf.parse("2014061100");
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		Date d2 = null;
		try {
			d2 = sf.parse("2014121100");
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		//new 
		Map map=new HashMap<String, Object>();
		map.put("beginTime", d1);
		map.put("endTime", d2);
		List list=testMapper.getTest(map);
		System.out.println(list.size());
	}

2.批量更新.
   大部分传list就可以了,传map也可以,但map也要解析成list,可以自行研究map,这里介绍通用的list传值方法:
(1)mapper

	public  int batchUpdate(List<Test> list);

(2)xml

     <update id="batchUpdate" parameterType="java.util.List">  
            	<foreach collection="list" item="list" index="index" open="begin" close=";end;" separator=";">
             update Test  
             <set>       
                A= A + #{list.a}
            </set>
            where B = #{list.b}     
            </foreach >
    </update> 

(3)测试类

public void testBatchUpdate(){
		List<Test > item=new ArrayList<Test>();
		for(int i=0;i<10;i++){
			Test Test=new Test();
			Test.setA(i+10);
			Test.setB("kkk");
			item.add(Test);
		}
	int count=	TestMapper.batchUpdate(item);
	System.out.println("jieguo:"+ count);
	}