SpringBoot默認(rèn)有自定義異常處理的體系，在做SpringBoot項目的時候，如果是拋出了運行時異常，springBoot并會對異常進(jìn)行處理，返回如下異常信息：

{"timestamp": 1517294278132,"status": 500,"error": "Internal Server Error","exception": "com.lgy.common.exception.BusinessException","message": "[001]自定義的uncheck 異常！","path": "/validateExceptionTest" }

追究其原因，發(fā)現(xiàn)SpirngBoot出現(xiàn)異常信息時候，會默認(rèn)訪問/error,springBoot種有BasicErrorController這個類來處理異常信息：?

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// // Source code recreated from a .class file by IntelliJ IDEA // (powered by Fernflower decompiler) // package org.springframework.boot.autoconfigure.web;import java.util.Collections; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.boot.autoconfigure.web.ErrorProperties.IncludeStacktrace; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.util.Assert; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView;@Controller @RequestMapping({"${server.error.path:${error.path:/error}}"}) public class BasicErrorController extends AbstractErrorController {private final ErrorProperties errorProperties;public BasicErrorController(ErrorAttributes errorAttributes, ErrorProperties errorProperties) {this(errorAttributes, errorProperties, Collections.emptyList());}public BasicErrorController(ErrorAttributes errorAttributes, ErrorProperties errorProperties, List<ErrorViewResolver> errorViewResolvers) {super(errorAttributes, errorViewResolvers);Assert.notNull(errorProperties, "ErrorProperties must not be null");this.errorProperties = errorProperties;}public String getErrorPath() {return this.errorProperties.getPath();}@RequestMapping(produces = {"text/html"})public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) {HttpStatus status = this.getStatus(request);Map<String, Object> model = Collections.unmodifiableMap(this.getErrorAttributes(request, this.isIncludeStackTrace(request, MediaType.TEXT_HTML)));response.setStatus(status.value());ModelAndView modelAndView = this.resolveErrorView(request, response, status, model);return modelAndView == null?new ModelAndView("error", model):modelAndView;}@RequestMapping@ResponseBodypublic ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {Map<String, Object> body = this.getErrorAttributes(request, this.isIncludeStackTrace(request, MediaType.ALL));HttpStatus status = this.getStatus(request);return new ResponseEntity(body, status);}protected boolean isIncludeStackTrace(HttpServletRequest request, MediaType produces) {IncludeStacktrace include = this.getErrorProperties().getIncludeStacktrace();return include == IncludeStacktrace.ALWAYS?true:(include == IncludeStacktrace.ON_TRACE_PARAM?this.getTraceParameter(request):false);}protected ErrorProperties getErrorProperties() {return this.errorProperties;} }

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如果要取代SpringBoot默認(rèn)的異常處理信息方式，繼承ErrorController：

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package com.lgy.controller;import com.alibaba.fastjson.JSONObject; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.web.BasicErrorController; import org.springframework.boot.autoconfigure.web.ErrorAttributes; import org.springframework.boot.autoconfigure.web.ErrorController; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.context.request.RequestAttributes; import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest; import java.util.Map;/*** Created by fengch on 2018/1/30.*/ @Controller @RequestMapping("${server.error.path:${error.path:/error}}") public class FundaErrorController implements ErrorController {private static final String PATH = "/error";@Autowiredprivate ErrorAttributes errorAttributes;@Overridepublic String getErrorPath() {return PATH;}@RequestMapping@ResponseBodypublic JSONObject doHandleError(HttpServletRequest request) {RequestAttributes requestAttributes = new ServletRequestAttributes(request);Map<String,Object> errorAttributesData = errorAttributes.getErrorAttributes(requestAttributes,true);Integer status=(Integer)errorAttributesData.get("status"); //狀態(tài)碼String path=(String)errorAttributesData.get("path"); //請求路徑String messageFound=(String)errorAttributesData.get("message"); //異常信息 JSONObject reData = new JSONObject();reData.put("status_", status);reData.put("path_", path);reData.put("message", messageFound);return reData;} }

接著在訪問，并是自定義處理的異常信息了：

{"message": "[001]自定義的uncheck 異常！","path_": "/validateExceptionTest","status_": 500 }

【轉(zhuǎn)載】

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