Spring Boot 自定义错误

自定义错误信息三种方式：使用ErrorAttribute自定义返回错误信息、自定义ErrorController处理异常、使用@ControllerAdvice&@ExceptionHandler配置全局处理异常

编写Controller类：

    @RequestMapping("exception")
    public Map<String,Object> exception() throws Exception {
        throw new Exception("发成异常");
    }

1.使用ErrorAttribute自定义返回错误信息，个人觉得适合用于处理API接口错误

添加ErrorAttribute配置类：

@Configuration
public class MyErrorAttribute extends DefaultErrorAttributes {
    @Override
    public Map<String, Object> getErrorAttributes(WebRequest webRequest, boolean includeStackTrace) {
        Map<String,Object> attributes = super.getErrorAttributes(webRequest,includeStackTrace);
        attributes.put("code","-1");
        attributes.put("message","发生异常");
        return attributes;
    }
}

使用Postman测试结果：

2.使用自定义ErrorController处理异常

@Controller
public class MyErrorController implements ErrorController {
    private static final String ERROR_PATH = "/error";
    private ErrorAttributes errorAttributes;
    @Override
    public String getErrorPath() {
        return ERROR_PATH;
    }
    @Autowired
    public MyErrorController(ErrorAttributes errorAttributes){
        this.errorAttributes = errorAttributes;
    };

    @RequestMapping(value = ERROR_PATH,produces = "text/html")
    @ResponseBody
    public String errorPageHandler(HttpServletRequest request, HttpServletResponse response){
        ServletWebRequest requestAttributes =  new ServletWebRequest(request);
        Map<String, Object> attr = this.errorAttributes.getErrorAttributes(requestAttributes, false);
        attr.put("code","-2");
        attr.put("message","发生异常");
        return JSONObject.toJSONString(attr);
    }

    @RequestMapping(value = ERROR_PATH)
    @ResponseBody
    public Map<String, Object> errorApiHandler(HttpServletRequest request){
        ServletWebRequest requestAttributes = new ServletWebRequest(request);
        Map<String, Object> attr=this.errorAttributes.getErrorAttributes(requestAttributes, false);
        attr.put("code","-2");
        attr.put("message","发生异常");
        return attr;
    }
}

Postman测试结果

浏览器测试结果

3.使用@ControllerAdvice、@ExceptionHandler配置全局处理异常

编写类：

@ControllerAdvice
public class MyGlobalExceptionHandler {
    @ResponseBody
    @ExceptionHandler(value = Exception.class)
    public Map errorHandler(Exception ex) {
        Map map = new HashMap();
        map.put("code", -3);
        map.put("msg", ex.getMessage());
        return map;
    }
}

浏览器测试结果

Postman测试结果

4.错误信息显示优先级

@ControllerAdvice >> ErrorController >> ErrorAttribute

本文地址：https://blog.csdn.net/qq_32530561/article/details/112008557