spring-mvc - 用于 Restful 和正常的 Spring MVC ExceptionHandler

Question

我想处理正常和 rest/ajax 请求的异常。这是我的代码，

@ControllerAdvice
public class MyExceptionHandler {

    @ExceptionHandler(Exception.class)
    public ModelAndView handleCustomException(Exception ex) {

        ModelAndView model = new ModelAndView("error");
        model.addObject("errMsg", ex.getMessage());
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        ex.printStackTrace(pw);
        sw.toString();
        model.addObject("errTrace", sw);
        return model;

    }

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public String handleAjaxException(Exception ex) {
        JSONObject model = new JSONObject();
        model.put("status", "error");
        model.put("errMsg", ex.getMessage());
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        ex.printStackTrace(pw);
        sw.toString();
        model.put("errTrace", sw);

        return model.toString();
    }
}

这会给我一个错误，因为我不能使用 @ExceptionHandler(Exception.class) 两次。那么解决方案是什么？

Answer 1

看@ControllerAdvice的配置: http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/bind/annotation/ControllerAdvice.html

因此您可以创建两个类(错误处理程序)并指定 annotations/basePackages/assignibaleTypes

例如，对于 REST(ajax)，为您的 Controller 使用 @RestController 注释，您可以像这样处理错误:

@ControllerAdvice(annotations = RestController.class)
public class MyExceptionHandler {

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public String handleAjaxException(Exception ex) {
        ...
    }
}

对于其他情况，它可以是带有注释的错误处理程序

@ControllerAdvice(annotations = Controller.class)