Spring 是如何捕捉校验参数异常并处理的?
程序员考拉
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·
2020-07-29 18:56
出处:cnblogs.com/fqybzhangji/p/10384347.html
使用 @Validated ,@Valid ,@NotBlank 之类的,请自行百度,本文着重于捕捉校验失败信息并封装返回出去
参考:
https://mp.weixin.qq.com/s/EaZxYKyC4L_EofWdtyBCpw
https://www.jianshu.com/p/bcc5a3c86480
捕捉校验失败异常信息
@ControllerAdvice
public class WebExceptionHandler {
//处理Get请求中 使用@Valid 验证路径中请求实体校验失败后抛出的异常,详情继续往下看代码
@ExceptionHandler(BindException.class)
@ResponseBody
public ResponseVO BindExceptionHandler(BindException e) {
String message = e.getBindingResult().getAllErrors().stream().map(DefaultMessageSourceResolvable::getDefaultMessage).collect(Collectors.joining());
return new ResponseVO(message);
}
//处理请求参数格式错误 @RequestParam上validate失败后抛出的异常是javax.validation.ConstraintViolationException
@ExceptionHandler(ConstraintViolationException.class)
@ResponseBody
public ResponseVO ConstraintViolationExceptionHandler(ConstraintViolationException e) {
String message = e.getConstraintViolations().stream().map(ConstraintViolation::getMessage).collect(Collectors.joining());
return new ResponseVO(message);
}
//处理请求参数格式错误 @RequestBody上validate失败后抛出的异常是MethodArgumentNotValidException异常。
@ExceptionHandler(MethodArgumentNotValidException.class)
@ResponseBody
public ResponseVO MethodArgumentNotValidExceptionHandler(MethodArgumentNotValidException e) {
String message = e.getBindingResult().getAllErrors().stream().map(DefaultMessageSourceResolvable::getDefaultMessage).collect(Collectors.joining());
return new ResponseVO(message);
}
}
如下示例请求参数报错的话,会抛出 BindException 而不是 ConstraintViolationException 和 MethodArgumentNotValidException
@RestController
@RequestMapping("test")
public class TestController {
@GetMapping("refund")
public ResponseVO refund(@Valid RefundRequest request) throws Exception {
return new ResponseVO();
}
}
@Data
public class RefundRequest implements Serializable {
@NotBlank(message = "订单号不能为空")
private String orderId;
@Min(value = 0, message = "已消费金额金额不能为负数")
private int orderAmt;
}
如果多个请求参数都校验失败,则遇到第一个校验失败就抛出异常,接下来的异常参数不做校验,配置如下:
@Configuration
public class WebConfig {
@Bean
public Validator validator() {
ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
.configure()
//failFast的意思只要出现校验失败的情况,就立即结束校验,不再进行后续的校验。
.failFast(true)
.buildValidatorFactory();
return validatorFactory.getValidator();
}
@Bean
public MethodValidationPostProcessor methodValidationPostProcessor() {
MethodValidationPostProcessor methodValidationPostProcessor = new MethodValidationPostProcessor();
methodValidationPostProcessor.setValidator(validator());
return methodValidationPostProcessor;
}
}
如果觉得不错点个“在看”哟!
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