@NotNull注解不生效，全局异常处理

1.引入依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId><version>3.1.2</version>
</dependency>

2：实体类

实体类属性加上@NotNull注解  例：@NotNull(message = "id不能为空")

public class People  {private Integer bizCode;@NotNull(message = "id不能为空")private Long id;private String name;private Integer age;private String address;private String userName;private String pwd;private String email;private String phonenumber;private String sex;public Long getId() {return id;}public Integer getBizCode() {return bizCode;}public void setBizCode(Integer bizCode) {this.bizCode = bizCode;}public void setId(Long id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getPhonenumber() {return phonenumber;}public void setPhonenumber(String phonenumber) {this.phonenumber = phonenumber;}@JsonIgnore@JsonPropertypublic String getPwd() {return pwd;}public void setPwd(String pwd) {this.pwd = pwd;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}

3：controller   加上@Valid 注解

@RestController
public class PeopleController {@PostMapping("save")public AjaxResult save(  @RequestBody  @Valid People people) {System.out.println(people);return AjaxResult.success( people );}
}

4：创建全局异常类，捕获异常

/*** 全局异常处理器*/
@RestControllerAdvice
public class GlobalExceptionHandler
{private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);/*** 自定义验证异常*/@ExceptionHandler(MethodArgumentNotValidException.class)public Object handleMethodArgumentNotValidException(MethodArgumentNotValidException e){log.error(e.getMessage(), e);String message = e.getBindingResult().getFieldError().getDefaultMessage();return AjaxResult.error(message);}}

5：postman测试

       不传id测试

传入id测试