1.Java对象--->JSON对象 Student stu = new Student("公众号BiggerBoy", "m", 2);
JSONObject jsonObject = (JSONObject) JSONObject.toJSON(stu); 2.Java对象--->JSON字符串 Student stu = new Student("公众号BiggerBoy", "...
1.@ 根据id更新 User user = new User();
user.setUserId(1);
user.setAge(29); userMapper.updateById(user); 2.@ 条件构造器作为参数进行更新 //把名字为rhb的用户年龄更新为18,其他属性不变
UpdateWrapper<User> updateWrapper = new Updat...