SpringBoot自定义错误信息,SpringBoot自定义异常处理类,
SpringBoot异常结果处理适配页面及Ajax请求,
SpringBoot适配Ajax请求
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©Copyright 蕃薯耀 2018年3月29日
http://www.cnblogs.com/fanshuyao/
附件&源码下载见:http://fanshuyao.iteye.com/blog/2414865
一、自定义异常处理类:
- import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import com.lqy.springboot.component.CustomErrorAttribute;
@ControllerAdvice
public class CustomExceptionHandler {
/**
* 自定义异常数据
* 缺点,没有适配页面和Ajax请求,返回的数据都是json数据
* @param req
* @return
*/
/*@ResponseBody
@ExceptionHandler(Exception.class)
public Map<String, Object> exceptionHandler(HttpServletRequest req){
Map<String, Object> map = new HashMap<String, Object>();
map.put("errorCode", 500);
map.put("errorMsg", "错误信息");
map.put("errorSystem", "errorSystem");
return map;
}*/
/**
* 自定义异常数据
* 适配页面和Ajax请求
* 注解ExceptionHandler(Exception.class)的Exception.class可以替换成自己定义的错误异常类
* @param req
* @return
*/
@ExceptionHandler(Exception.class)
public String exceptionHandler(HttpServletRequest req){
Map<String, Object> map = new HashMap<String, Object>();
map.put("errorCode", 500);
map.put("errorMsg", "错误信息");
map.put("errorSystem", "errorSystem");
req.setAttribute(CustomErrorAttribute.CUSTOM_ERROR_MAP_NAME, map);
//传入自己的错误代码,必须的,否则不会进入自定义错误页面,见:org.springframework.boot.autoconfigure.web.AbstractErrorController
req.setAttribute("javax.servlet.error.status_code", 500);
//转发到springBoot错误处理请求,能适配网页和Ajax的错误处理
//请求/error后,会进入BasicErrorController(@RequestMapping("${server.error.path:${error.path:/error}}"))
//页面的数据显示处理是使用:errorAttributes.getErrorAttributes获取显示的,是AbstractErrorController的方法
//当需要把自己定义的Map错误信息传递到错误提示页面时,
//可以编写一个自定义错误属性类处理:CustomErrorAttribute,继承DefaultErrorAttributes类,
//重写getErrorAttributes(RequestAttributes requestAttributes, boolean includeStackTrace)方法
return "forward:/error";
}
}
异常捕捉后请求转发到
- return "forward:/error";
是为了让SpringBoot底层处理,协助系统适配页面返回结果和Ajax返回结果:当是页面打开时,会跳转到相应的错误页面显示异常信息,当是Ajax请求或者使用工具请求时,返回的json字符串。(下面有图)
SpringBoot适配页面返回结果和Ajax返回结果的代码如下:
- @RequestMapping(produces = "text/html")
public ModelAndView errorHtml(HttpServletRequest request,
HttpServletResponse response) {
HttpStatus status = getStatus(request);
Map<String, Object> model = Collections.unmodifiableMap(getErrorAttributes(
request, isIncludeStackTrace(request, MediaType.TEXT_HTML)));
response.setStatus(status.value());
ModelAndView modelAndView = resolveErrorView(request, response, status, model);
return (modelAndView == null ? new ModelAndView("error", model) : modelAndView);
}
@RequestMapping
@ResponseBody
public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {
Map<String, Object> body = getErrorAttributes(request,
isIncludeStackTrace(request, MediaType.ALL));
HttpStatus status = getStatus(request);
return new ResponseEntity<Map<String, Object>>(body, status);
}
二、自定义异常信息传递类
- import java.util.Map;
import org.springframework.boot.autoconfigure.web.DefaultErrorAttributes;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
@Component
public class CustomErrorAttribute extends DefaultErrorAttributes {
public static final String CUSTOM_ERROR_MAP_NAME = "customErrorMap";
@Override
public Map<String, Object> getErrorAttributes(RequestAttributes requestAttributes, boolean includeStackTrace) {
Map<String, Object> map = super.getErrorAttributes(requestAttributes, includeStackTrace);
//设置传递自己定义的错误信息
map.put(CUSTOM_ERROR_MAP_NAME, requestAttributes.getAttribute(CUSTOM_ERROR_MAP_NAME, RequestAttributes.SCOPE_REQUEST));
return map;
}
}
定义这个类,是为了传递自己想要显示的错误信息,例如在Controller发生错误时,想把某些特殊信息传到错误页面,就可以自定义一个异常信息处理类,传递自己的自定义错误信息,同时也兼容SpringBoot本身定义好的错误 信息。
三、页面显示异常信息
- <!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>500</title>
</head>
<body>
<div>500错误</div>
<div>path:[[${path}]]</div>
<div>status:[[${status}]]</div>
<div>timestamp:[[${#dates.format(timestamp, 'yyyy-MM-dd HH:mm:ss')}]]</div>
<div>error:[[${error}]]</div>
<div>exception:[[${exception}]]</div>
<div>message:[[${message}]]</div>
<div>errors:[[${errors}]]</div>
<!-- 自定义属性 -->
<div>customErrorMap.errorMsg:[[${customErrorMap.errorMsg}]]</div>
<div>customErrorMap.errorSystem:[[${customErrorMap.errorSystem}]]</div>
<div>customErrorMap.errorCode:[[${customErrorMap.errorCode}]]</div>
</body>
</html>
页面显示结果:
Post请求结果:
项目源码见附件:SpringBoot-自定义错误.zip
======SpringBoot自定义错误页面见:======
SpringBoot自定义错误页面,SpringBoot 404、500错误提示页面
SpringBoot 4xx.html、5xx.html错误提示页面
http://www.cnblogs.com/fanshuyao/p/8668072.html
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©Copyright 蕃薯耀 2018年3月29日
http://www.cnblogs.com/fanshuyao/