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java - How to throw Spring @Valid "exception"?

问题描述

I'm using Spring to build my REST api. One of my methods is decorated with @Valid. This produces a JSON that looks like this:

{
  "timestamp": "2019-11-04T19:07:08.387+0000",
  "status": 400,
  "error": "Bad Request",
  "errors": [
    {
      "codes": [
        "NotNull.customer.firstName",
        "NotNull.firstName",
        "NotNull.java.lang.String",
        "NotNull"
      ],
      "arguments": [
        {
          "codes": [
            "customer.firstName",
            "firstName"
          ],
          "arguments": null,
          "defaultMessage": "firstName",
          "code": "firstName"
        }
      ],
      "defaultMessage": "must not be null",
      "objectName": "customer",
      "field": "firstName",
      "rejectedValue": null,
      "bindingFailure": false,
      "code": "NotNull"
    }
  ],
  "message": "Validation failed for object='customer'. Error count: 1",
  "path": "/customers"
}

Doing a Google search, to produce a HTTP 400 error, I'm supposed to throw ResponseStatusException(HttpStatus.BAD_REQUEST);

This produces a JSON like this:

{
  "timestamp": "2019-11-04T19:08:02.408+0000",
  "status": 400,
  "error": "Bad Request",
  "message": "400 BAD_REQUEST",
  "path": "/customers"
}

The message is easy to change obviously, but I'm more asking about how to get the Errors array. That doesn't seem to be in ResponseStatusException?

I can recreate it pretty easily, but I was hoping there was one built already?

EDIT: This isn't input validation per say... this is throwing an error FOR the input, but I need to hit the database first to do the actual validation, so that part is in my service layer and throws an internal exception if it isn't valid.

标签： javaspring

解决方案

如果您使用的是验证器，那么您可以使用配置文件来自定义错误，例如validator.properties

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