我想在Rest
spring启动应用程序中处理异常.我知道使用@ControllerAdvice和ResponseEntity,我可以返回一个代表我的错误的自定义对象,但我想要的是在exesting异常的主体中添加一个新字段.
我创建了一个自定义的Exception,它继承了RuntimeException,带有一个额外的属性,一个字符串列表：
@ResponseStatus(HttpStatus.CONFLICT)
public class CustomException extends RuntimeException {
private List<String> errors = new ArrayList<>();
public CustomException(List<String> errors) {
this.errors = errors;
}
public CustomException(String message) {
super(message);
}
public CustomException(String message,List<String> errors) {
super(message);
this.errors = errors;
}
public List<String> getErrors() {
return errors;
}
public void setErrors(List<String> errors) {
this.errors = errors;
}
}
在我的控制器中,我只是这样抛出这个自定义异常：
@GetMapping("/appointment")
public List<Appointment> getAppointments() {
List<String> errors = new ArrayList<>();
errors.add("Custom message");
throw new CustomException("This is my message",errors);
}
当我用邮递员测试我的Rest端点时,似乎spring boot不会编组我的错误字段,响应是：
{
"timestamp": "2017-06-05T18:19:03","status": 409,"error": "Conflict","exception": "com.htech.bimaristan.utils.CustomException","message": "This is my message","path": "/api/agenda/appointment"
}
我可以使用@ControllerAdvice来获取自定义对象,如果我可以从异常中获取“path”和“timestamp”字段,但是这两个属性没有getter.
谢谢.
解决方法
好！以下是DefaultErrorAttributes中“path”和“timestamp”的实现,您也可以在自定义实现中执行此操作：
路径：
String path = getAttribute(requestAttributes,"javax.servlet.error.request_uri");
if (path != null) {
errorAttributes.put("path",path);
}
时间戳：
errorAttributes.put("timestamp",new Date());
@Bean
public ErrorAttributes errorAttributes() {
return new DefaultErrorAttributes() {
@Override
public Map<String,Object> getErrorAttributes(RequestAttributes requestAttributes,boolean includeStackTrace) {
Map<String,Object> errorAttributes = super.getErrorAttributes(requestAttributes,includeStackTrace);
// customize here
return errorAttributes;
}
};
}
或者您可以编写自定义实现：
@Component
public class CustomErrorAttributes extends DefaultErrorAttributes {
@Override
public Map<String,boolean includeStackTrace) {
Map<String,includeStackTrace);
// customize here
return errorAttributes;
}
}
ErrorAttributes bean自定义下面的错误响应：
{
"timestamp": 1413883870237,"status": 500,"error": "Internal Server Error","exception": "org.example.ServiceException","message": "somthing goes wrong","path": "/index"
}
可以使用@ExceptionHandler自定义“exception”属性. @ControlerAdvice可用于跨控制器一般自定义异常.要在Controller级别进行自定义,可以将它们放在控制器中.
在你的情况下：
@ResponseStatus(value=HttpStatus.BAD_REQUEST,reason="Invalid Inputs")
@ExceptionHandler(CustomException.class)
private void errorHanlder() {
//Log exception
}
public Map<String,boolean includeStackTrace) {
Map<String,includeStackTrace);
Throwable error = getError(requestAttributes);
if (error instanceof CustomException) {
errorAttributes.put("errorList",((CustomException)error).getErrors());
}
return errorAttributes;
}
