控制器SpringMVC处理错误 [英] Error handling on controller SpringMVC

问题描述

我正在jax-rs和spring mvc开发一个应用程序。
我想在每次出现默认错误时通知我的客户，如
400,403,404,405和415。

控制器

  @Controller 
 @RequestMapping（/ customer）
 public class CustomerController {
 
 @Autowired 
 CustomerService customerService; 
 
 // ........ xxxxxx .............. xxxxxxx ................ xxxxxxx ............. // 
 
 
 @CrossOrigin 
 @RequestMapping（value =/，
 method = RequestMethod .GET，
 produce = MediaType.APPLICATION_JSON_VALUE）
 public @ResponseBody String fetchCustomer（）throws JsonProcessingException {
 return new ObjectMapper（）。writeValueAsString（customerService.fetchAllCustomer（））; 
} 
 
 // ........ xxxxxx .............. xxxxxxx ........... ..... xxxxxxx ............. // 
 
} 
  

客户端

  $ http（{
 method：GET，
 contentType：application / json，
 url：baseUrl +'/ customer'
}）。success（function（response）{
 console.log（response）; 
 //你也可以使用
 console.log（JSON.stringify（response）; 
}）。error（function（response）{
 console.log（response）; 
}）; 
  

当我从客户端请求一个服务时，我想用状态代码和自定义消息。

示例

当我在控件和客户端上定义method = post时，我发送请求作为get服务应该返回消息，如

 错误：{
状态码：405，
消息：无效方法
 url：错误/ 405 
} 
  

解决方案

一个String，但返回一个org.springframework.http.ResponseEntity。
您可以向此对象添加状态代码

  ResponseEntity< String> responseEntity = new ResponseEntity< String>（这是一个响应，HttpStatus.INTERNAL_SERVER_ERROR）; 
 return responseEntity; 
  

所以你的方法签名也会如下更改

  @RequestMapping（value =/，method = RequestMethod.GET，produce = MediaType.APPLICATION_JSON_VALUE）
 public @ResponseBody ResponseEntity< String> fetchCustomer（）throws JsonProcessingException {
 try {
 String str = new ObjectMapper（）。writeValueAsString（customerService.fetchAllCustomer（））; 
返回新的ResponseEntity< String>（str，HttpStatus.OK）; 
} 
 catch（Exception e）{
 return new ResponseEntity< String>（e.getMessage（），HttpStatus.INTERNAL_SERVER_ERROR）; 
} 
} 
  

如果有错误，可以使用控制器建议或捕获异常并适当地更新ResponseEntity

I am developing an application in jax-rs and spring mvc. I want to notify my client each time when an default error is occured like 400, 403, 404, 405 and 415.

Controller

    @Controller
    @RequestMapping("/customer")
    public class CustomerController {

        @Autowired
        CustomerService customerService;

        // ........xxxxxx..............xxxxxxx................xxxxxxx.............//


            @CrossOrigin
            @RequestMapping(value = "/", 
                            method = RequestMethod.GET, 
                            produces = MediaType.APPLICATION_JSON_VALUE)
            public @ResponseBody String fetchCustomer() throws JsonProcessingException {
                return new ObjectMapper().writeValueAsString(customerService.fetchAllCustomer());
            }

            // ........xxxxxx..............xxxxxxx................xxxxxxx.............//

}  

Client

$http({
        method: "GET",
        contentType: "application/json",
        url: baseUrl + '/customer'
      }).success(function (response) {
        console.log(response);
        // you can also use
        console.log(JSON.stringify(response);
      }).error(function (response) {
        console.log(response);
      });

When i request a service from client i want to send response back with status code and custom message.

Example

When i defind method = post on controller and from client i send request as get service should return message like

error:{
     Status Code: 405,
     Message:  Invalid Method 
     url: error/405
}

解决方案

Do not return a String but return a org.springframework.http.ResponseEntity. You can add status codes to this object

ResponseEntity<String> responseEntity = new ResponseEntity<String>("This is a response", HttpStatus.INTERNAL_SERVER_ERROR);
return responseEntity;

So your method signature will also change as below

    @RequestMapping(value = "/", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public @ResponseBody ResponseEntity<String> fetchCustomer() throws JsonProcessingException {
        try {
            String str = new ObjectMapper().writeValueAsString(customerService.fetchAllCustomer());
            return new ResponseEntity<String>(str, HttpStatus.OK);
         }
        catch (Exception e) {
             return new ResponseEntity<String>(e.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

If there is an error, you can either use controller advice or catch the exception and update the ResponseEntity appropriately

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