1.1.1 实体类添加校验

package com.geji.pojo;

import jakarta.validation.constraints.NotEmpty;
import lombok.Data;

import java.time.LocalDateTime;

@Data
public class Category {

    private Integer id;//主键ID
    @NotEmpty
    private String categoryName;//分类名称
    @NotEmpty
    private String categoryAlias;//分类别名
    private Integer createUser;//创建人ID

    private LocalDateTime createTime;//创建时间

    private LocalDateTime updateTime;//更新时间
}

1.1.2 Controller

package com.geji.controller;

import com.geji.pojo.Category;
import com.geji.pojo.Result;
import com.geji.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/category")
public class CategoryController {

    @Autowired
    private CategoryService categoryService;

    @PostMapping
    public Result add(@RequestBody @Validated Category category) {
        categoryService.add(category);
        return Result.success();
    }
}

1.1.3 Service

package com.geji.service;

import com.geji.pojo.Category;

public interface CategoryService {
    void add(Category category);
}

1.1.4 ServiceImpl

package com.geji.service.impl;

import com.geji.mapper.CategoryMapper;
import com.geji.pojo.Category;
import com.geji.service.CategoryService;
import com.geji.utils.ThreadLocalUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.Map;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public void add(Category category) {
        //补充属性值
        category.setCreateTime(LocalDateTime.now());
        category.setUpdateTime(LocalDateTime.now());

        Map<String,Object> map = ThreadLocalUtil.get();
        Integer userId = (Integer) map.get("id");
        category.setCreateUser(userId);
        categoryMapper.add(category);
    }
}

1.1.5 mapper

package com.geji.mapper;

import com.geji.pojo.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

@Mapper
public interface UserMapper {
    //根据用户名查询用户
    @Select("select * from user where username=#{username}")
    User findByUserName(String username);

    //添加
    @Insert("insert into user(username,password,create_time,update_time)" +
            " values(#{username},#{password},now(),now())")
    void add(String username, String password);

    @Update("update user set nickname=#{nickname},email=#{email},update_time=#{updateTime} where id=#{id}")
    void update(User user);

    @Update("update user set user_pic=#{avatarUrl},update_time=now() where id=#{id}")
    void updateAvatar(String avatarUrl,Integer id);

    @Update("update user set password=#{md5String},update_time=now() where id=#{id}")
    void updatePwd(String md5String, Integer id);
}

1.1.6 测试