170515、mybatis批量操作

//Java代码

public void batchAdd(){
SqlSession sqlSession = SqlSessionFactoryUtil.getSqlSession();
StudentMappper mapper = sqlSession.getMapper(StudentMappper.class);
List<Student> list = new ArrayList<Student>();
Student student1 = new Student();
student1.setName("新增" + new Random().nextInt(10));
student1.setAge(16);

Student student2 = new Student();
student2.setName("新增" + new Random().nextInt(10));
student2.setAge(16);
list.add(student1);
list.add(student2);

int result = mapper.batchAdd(list);
sqlSession.commit();
if (result > 0) {
System.out.println("----------batchAdd success-----");
} else {
System.out.println("----------batchAdd fail---------");
}
}

<!-- 批量新增 -->
    <insert id="batchAdd" parameterType="java.util.List" useGeneratedKeys="true" >
        <selectKey resultType="int" keyProperty="id" order="AFTER">
            select  LAST_INSERT_ID()  
        </selectKey>
        insert into t_student (name,age)
        values
        <foreach collection="list" item="item" index="index" separator=",">
            (#{item.name},${item.age})
        </foreach>
    </insert>
   
 //Java代码

public void batchDelList(){
SqlSession sqlSession = SqlSessionFactoryUtil.getSqlSession();
StudentMappper mapper = sqlSession.getMapper(StudentMappper.class);
List<Integer> list = new ArrayList<Integer>();
list.add(23);
list.add(24);
int result = mapper.batchDelStr(list);
sqlSession.commit();
if (result > 0) {
System.out.println("----------batchDel success-----");
} else {
System.out.println("----------batchDel fail---------");
}
}

    <!-- 批量删除-list -->
    <delete id="batchDelStr" parameterType="java.util.List">
        delete from t_student 
        where id in
        <foreach collection="list" item="item" open="(" close=")" separator=",">
            #{item} 
        </foreach>
    </delete>
    //Java代码

public void batchDelArray(){
SqlSession sqlSession = SqlSessionFactoryUtil.getSqlSession();
StudentMappper mapper = sqlSession.getMapper(StudentMappper.class);
int[] ids = new int[]{27,28};
int result = mapper.batchDelArrays(ids);
sqlSession.commit();
if (result > 0) {
System.out.println("----------batchDel success-----");
} else {
System.out.println("----------batchDel fail---------");
}
}

    <!-- 批量删除-array -->
    <delete id="batchDelArrays" parameterType="int">
        delete from t_student
        where id in
        <foreach collection="array" item="id" open="(" close=")" separator=",">
            #{id}
        </foreach>
    </delete>