1.1实体类增加校验注释

1.1.1 自定义校验

1.1.1.1 自定义注解

package com.geji.anno;import com.geji.validation.StateValidation;
import jakarta.validation.Constraint;
import jakarta.validation.Payload;
import jakarta.validation.constraints.NotEmpty;import java.lang.annotation.Documented;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;@Documented//元注解,标识这个注解可以放到帮助文档里面
@Target({ FIELD})//元注解，标志这个注解可以用在哪些地方
@Retention(RUNTIME)//元注解，在哪个阶段被保留，编译，运行等
@Constraint(validatedBy = { StateValidation.class})//指定提供校验规则的类
public @interface State {//提供校验失败后的提示信息String message() default "state参数的值只能是已发布或者草稿";//指定分组Class<?>[] groups() default { };//负载  获取到State注解的附加信息Class<? extends Payload>[] payload() default { };
}

1.1.1.2 自定义校验类

package com.geji.validation;import com.geji.anno.State;
import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;public class StateValidation implements ConstraintValidator<State,String> {/**** @param value 将来要校验的数据* @param context context in which the constraint is evaluated** @return 如果返回false,则校验不通过,如果返回true,则校验通过*/@Overridepublic boolean isValid(String value, ConstraintValidatorContext context) {//提供校验规则if (value == null){return false;}if (value.equals("已发布") || value.equals("草稿")){return true;}return false;}
}

1.1.1.3 在需要的地方使用注解

package com.geji.pojo;import com.geji.anno.State;
import jakarta.validation.constraints.NotEmpty;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Pattern;
import lombok.Data;
import org.hibernate.validator.constraints.URL;import java.time.LocalDateTime;@Data
public class Article {private Integer id;//主键ID@NotEmpty@Pattern(regexp = "^\\S{1,10}$")private String title;//文章标题@NotEmptyprivate String content;//文章内容@NotEmpty@URLprivate String coverImg;//封面图像@Stateprivate String state;//发布状态 已发布|草稿@NotNullprivate Integer categoryId;//文章分类idprivate Integer createUser;//创建人IDprivate LocalDateTime createTime;//创建时间private LocalDateTime updateTime;//更新时间
}

1.1 Controller

package com.geji.controller;import com.geji.pojo.Article;
import com.geji.pojo.Result;
import com.geji.service.ArticleService;
import com.geji.utils.JwtUtil;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;@RestController
@RequestMapping("/article")
public class ArticleController {@Autowiredprivate ArticleService articleService;@PostMappingpublic Result add(@RequestBody @Validated Article article) {articleService.add(article);return Result.success();}
}

1.2 Service

package com.geji.service;import com.geji.pojo.Article;public interface ArticleService {void add(Article article);
}

1.3 ServiceImpl

package com.geji.service.impl;import com.geji.mapper.ArticleMapper;
import com.geji.pojo.Article;
import com.geji.service.ArticleService;
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 ArticleServiceImpl implements ArticleService {@Autowiredprivate ArticleMapper articleMapper;@Overridepublic void add(Article article) {//补充属性值article.setCreateTime(LocalDateTime.now());article.setUpdateTime(LocalDateTime.now());Map<String,Object> map = ThreadLocalUtil.get();Integer userId = (Integer) map.get("id");article.setCreateUser(userId);articleMapper.add(article);}
}

1.4 Mapper

package com.geji.mapper;import com.geji.pojo.Article;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;@Mapper
public interface ArticleMapper {//新增@Insert("insert into article(title,content,cover_img,state,category_id,create_user,create_time,update_time) " +"values(#{title},#{content},#{coverImg},#{state},#{categoryId},#{createUser},#{createTime},#{updateTime})")void add(Article article);}

1.5 Postman测试