Test public void getAll ListUser all = userMappergetAll; for User userall Systemoutprintlnuser; Test public void selectById ListUser users = userMa

@Test public void insert(){ User user = new User(); user.setName("张三"); user.setGender("男"); user.setAge(20); int i = userMapper.insert(user); if (i>0){ System.out.println("添加成功"); } System.out.println("添加失败"); }

@Test
public void deleteById(){
    int i = userMapper.deleteById(1);
    if (i>0){
        System.out.println("删除成功");
    }
    System.out.println("删除失败");
}