三种批量插入
第一种 普通for循环插入
①junit类
@Test
public void testInsertBatch2() throws Exception {
long start = System.currentTimeMillis();
User user;
SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(false);
UserDao mapper = sqlSession.getMapper(UserDao.class);
for (int i = 0; i < 500; i++) {
user = new User();
user.setId("test" + i);
user.setName("name" + i);
user.setDelFlag("0");
mapper.insert(user);
}
sqlSession.commit();
long end = System.currentTimeMillis();
System.out.println("---------------" + (start - end) + "---------------");
}
①xml配置
<insert id="insert">
INSERT INTO t_user (id, name, del_flag)
VALUES(#{id}, #{name}, #{delFlag})
</insert>
第二种 mybatis BATCH模式插入
①junit类
@Test
public void testInsertBatch2() throws Exception {
long start = System.currentTimeMillis();
User user;
SqlSession sqlSession = sqlSessionTemplate.getSqlSessionFactory().openSession(ExecutorType.BATCH, false);//跟上述sql区别
UserDao mapper = sqlSession.getMapper(UserDao.class);
for (int i = 0; i < 500; i++) {
user = new User();
user.setId("test" + i);
user.setName("name" + i);
user.setDelFlag("0");
mapper.insert(user);
}
sqlSession.commit();
long end = System.currentTimeMillis();
System.out.println("---------------" + (start - end) + "---------------");
}
①xml配置
<insert id="insert">
INSERT INTO t_user (id, name, del_flag)
VALUES(#{id}, #{name}, #{delFlag})
</insert>
第三种 foreach方式插入
①junit类
@Test
public void testInsertBatch() throws Exception {
long start = System.currentTimeMillis();
List<User> list = new ArrayList<>();
User user;
for (int i = 0; i < 10000; i++) {
user = new User();
user.setId("test" + i);
user.setName("name" + i);
user.setDelFlag("0");
list.add(user);
}
userService.insertBatch(list);
long end = System.currentTimeMillis();
System.out.println("---------------" + (start - end) + "---------------");
}
②xml配置
<insert id="insertBatch">
INSERT INTO t_user
(id, name, del_flag)
VALUES
<foreach collection ="list" item="user" separator =",">
(#{user.id}, #{user.name}, #{user.delFlag})
</foreach >
</insert>
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