@NoArgsConstructor
@AllArgsConstructor
@Setter
@Getter
@ToString
public class User {
    private Integer id;
    private String name;
    private Integer age;
    private String email;
    public User(String name, Integer age, String email) {
        this.name = name;
        this.age = age;
        this.email = email;
    }
}

@Mapper
public interface UserDao {
    void insertBatch(@Param("users") List<User> users);
}

<insert id="insertBatch" useGeneratedKeys="true" 
        keyProperty="id" parameterType="User">
    INSERT INTO user (`name`, age, email) values
    <foreach collection="users" item="item" separator="," >
        (#{item.name,jdbcType=VARCHAR}, #{item.age,jdbcType=INTEGER}, #{item.email,jdbcType=VARCHAR})
    </foreach>
</insert>

@Test
public void test_insertBatch(){
    List<User> users = new ArrayList<User>(){{
        User user = new User("sumAll",22,"sumAll@163.com");
        User user2 = new User("sumAll2",20,"sumAll2@163.com");
    }};
    userDao.insertBatch(users);
    logger.info(users.toString());
}

@Test
public void test_insertBatch(){
    List<User> users = new ArrayList<User>(){{
        User user = new User("sumAll",22,"sumAll@163.com");
        User user2 = new User("sumAll2",20,"sumAll2@163.com");
        add(user);
        add(user2);
    }};
    if(!users.isEmpty()){
        userDao.insertBatch(users);
        logger.info(users.toString());
    }
}