Springboot2和Springboot3表单检验的区别

最近公司新项目决定使用Springboot3，由于之前没系统学习过Springboot3，所以表单验证还是使用Springboot2中做法，

1.引入依赖：

 <dependency><groupId>javax.validation</groupId><artifactId>validation-api</artifactId><version>2.0.1.Final</version></dependency>

2.实体类导入依赖，检验规则引入的是javax.validation.constraints里面的包，比如NotBlank：

import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import com.tehg.test.common.validation.ListValue;
import com.tehg.test.common.validation.group.AddGroup;
import com.tehg.test.common.validation.group.UpdateGroup;
import com.tehg.test.common.validation.group.UpdateStatusGroup;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.URL;import javax.validation.constraints.*;import lombok.Data;import java.io.Serializable;/*** 品牌* * @author * @email* @date 2024-05-19 19:47:02*/
@Data
@TableName("pms_brand")
public class BrandEntity implements Serializable {private static final long serialVersionUID = 1L;/*** 品牌id*/@TableId@NotNull(message = "品牌id不能为空",groups = UpdateGroup.class)private Long brandId;/*** 品牌名*/@NotBlank(message = "品牌名称不能为空",groups = {AddGroup.class, UpdateGroup.class})private String name;/*** 品牌logo地址*/@NotNull(groups = {AddGroup.class, UpdateGroup.class})@URL(message = "logo必须是一个合法有效的url地址",groups = {AddGroup.class, UpdateGroup.class})private String logo;/*** 介绍*/private String descript;/*** 显示状态[0-不显示；1-显示]*/@NotNull(groups = {AddGroup.class, UpdateStatusGroup.class})@ListValue(vals={0,1},groups = {AddGroup.class, UpdateStatusGroup.class})private Integer showStatus;/*** 检索首字母*/@NotNull(groups = {AddGroup.class, UpdateGroup.class})@Pattern(regexp = "^[a-zA-Z]$",message = "检索首字母必须是一个字母",groups={AddGroup.class,UpdateGroup.class})private String firstLetter;/*** 排序*/@NotNull@Min(value = 0,message = "排序必须大于等于0")private Integer sort;}

3.controller中引入@Validated注解：

    @RequestMapping("/save")public Result save(@Validated(AddGroup.class) @RequestBody BrandEntity brand){brandService.save(brand);return Result.success();}

4.引入全局异常处理：

/*** 全局异常处理*/
@Slf4j
@RestControllerAdvice(basePackages = "com.whalehearing.tingyou.controller")
public class GlobalExceptionHandler {@ExceptionHandler(value= MethodArgumentNotValidException.class)public Result handleValidExcepton(MethodArgumentNotValidException e){log.error("数据检验出现异常，异常类型{},异常信息:{}",e.getClass(),e.getMessage());BindingResult bindingResult = e.getBindingResult();Map<String,Object> map=new HashMap<>();bindingResult.getFieldErrors().forEach(item ->{String field = item.getField();String defaultMessage = item.getDefaultMessage();map.put(field,defaultMessage);});return Result.error(ResultCodeEnum.VALID_EXCEPTION.getCode(),ResultCodeEnum.VALID_EXCEPTION.getMessage()).put("data",map);}@ExceptionHandler(value=Throwable.class)public Result handleUnknowExcepton(Throwable throwable){log.error("未知异常{}",throwable);Map<String,Object> map = new HashMap<>();map.put(ResultCodeEnum.UNKNOW_EXCEPTION.getCode().toString(),ResultCodeEnum.UNKNOW_EXCEPTION.getMessage());return Result.error(map);}}

PS:上面只列出关键业务代码

然后启动测试，发现表单验证不生效，经多方查询后才知道，由于项目是使用Springboot3搭建的，在Springboot3中，JAVA JSR303检验需使用jakarta.validation.constraints里面的类，如果使用自己额外导入的validation-api里面的检验规则，将不会生效。

Springboot3中只需引入下面的依赖即可,版本替换为自己的Springboot版本：

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId><version>3.1.3</version>
</dependency>