SpringBoot整合hibernatevalidationDemo

　　依赖                   org.springframework.boot         spring-boot-starter-validation         2.4.4                   org.springframework.boot         spring-boot-starter-web                        org.projectlombok         lombok         1.18.20       DTOpackage cn.pengld.validator.dto;  import lombok.Data; import javax.validation.constraints.*; import java.util.Date;  @Data public class UserDTO {     private Long id;     @NotEmpty(message = ＂username is empty＂)     private String username;     @NotEmpty(message = ＂pwd is empty＂)     private String pwd;     @NotEmpty(message = ＂name is empty＂)     private String name;     private Boolean sex;     @Past     private Date birth;     private String address;     private String phone;     @Email(message = ＂email is not correct＂)     private String email;     @Min(value = 1,message = ＂age must greater than 1＂)     private Integer age;      @Override     public String toString() {         return ＂UserDTO{＂ +                 ＂id=＂ + id +                 ＂, username=＂＂ + username + ＂＂＂ +                 ＂, pwd=＂＂ + pwd + ＂＂＂ +                 ＂, name=＂＂ + name + ＂＂＂ +                 ＂, sex=＂ + sex +                 ＂, birth=＂ + birth +                 ＂, address=＂＂ + address + ＂＂＂ +                 ＂, phone=＂＂ + phone + ＂＂＂ +                 ＂, email=＂＂ + email + ＂＂＂ +                 ＂, age=＂ + age +                 ＂}＂;     } } Serviceimport javax.validation.Valid;  //  接口方法申明 String addUser(@Valid UserDTO userDTO); package cn.pengld.validator.service.impl;  import cn.pengld.validator.dto.UserDTO; import cn.pengld.validator.service.UserService; import org.springframework.stereotype.Service; import org.springframework.validation.annotation.Validated;  @Service @Validated public class UserServiceImpl implements UserService {          @Override     public String addUser(UserDTO userDTO) {         System.out.println(userDTO.toString());         return ＂now is at service implements method return block＂;     } } global exception handlerpackage cn.pengld.validator.handler;  import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody;  import javax.validation.ConstraintViolation; import javax.validation.ConstraintViolationException; import java.util.HashMap; import java.util.Map;  @ControllerAdvice(basePackages = ＂cn.pengld.validator＂) @Component public class ValidateExceptionHandler {      @ExceptionHandler(value = ConstraintViolationException.class)     @ResponseBody     public Map handlValidateException(ConstraintViolationException e){         Map  m = new HashMap();         StringBuilder sb = new StringBuilder();         for(ConstraintViolation c : e.getConstraintViolations()){             sb.append(c.getMessage());         }         m.put(＂code＂,＂1001＂);         m.put(＂message＂,sb.toString());         return m;     } }