1.0 异常说明

SpringBoot搭建的接口服务。假设请求非注冊类的无效接口地址，则返回该页面。主要问题就是没有对异常请求做处理。

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举例，定义有效接口地址如：, 。则其他地址均为无效地址，若请求则返回上述Whitelabel Error Page页面。

2.0 异常处理

主要是加入一个AppErrorController的Controller类，这里我定义了异常返回页面。

package com.autonavi.controller;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.autoconfigure.web.ErrorAttributes;import org.springframework.boot.autoconfigure.web.ErrorController;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;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 org.springframework.web.servlet.ModelAndView;/** * Author: loongshawn * 
Date: 16-03-17 * 
Version: 1.0 */@Controllerpublic class AppErrorController implements ErrorController{
          private static final Logger logger = LoggerFactory.getLogger(AppErrorController.class);    private static AppErrorController appErrorController;     /**     * Error Attributes in the Application     */    @Autowired    private ErrorAttributes errorAttributes;    private final static String ERROR_PATH = "/error";    /**     * Controller for the Error Controller     * @param errorAttributes     * @return      */     public AppErrorController(ErrorAttributes errorAttributes) {        this.errorAttributes = errorAttributes;    }    public AppErrorController() {        if(appErrorController == null){            appErrorController = new AppErrorController(errorAttributes);        }    }    /**     * Supports the HTML Error View     * @param request     * @return     */    @RequestMapping(value = ERROR_PATH, produces = "text/html")    public ModelAndView errorHtml(HttpServletRequest request) {        return new ModelAndView("greeting", getErrorAttributes(request, false));    }    /**     * Supports other formats like JSON, XML     * @param request     * @return     */    @RequestMapping(value = ERROR_PATH)    @ResponseBody    public ResponseEntity
        
         > error(HttpServletRequest request) {        Map
         
           body = getErrorAttributes(request, getTraceParameter(request));        HttpStatus status = getStatus(request);        return new ResponseEntity
          
           
            >(body, status); } /** * Returns the path of the error page. * * @return the error path */ @Override public String getErrorPath() { return ERROR_PATH; } private boolean getTraceParameter(HttpServletRequest request) { String parameter = request.getParameter("trace"); if (parameter == null) { return false; } return !"false".equals(parameter.toLowerCase()); } private Map
            
              getErrorAttributes(HttpServletRequest request, boolean includeStackTrace) { RequestAttributes requestAttributes = new ServletRequestAttributes(request); Map
             
               map = this.errorAttributes.getErrorAttributes(requestAttributes,includeStackTrace); String URL = request.getRequestURL().toString(); map.put("URL", URL); logger.debug("AppErrorController.method [error info]: status-" + map.get("status") +", request url-" + URL); return map; } private HttpStatus getStatus(HttpServletRequest request) { Integer statusCode = (Integer) request .getAttribute("javax.servlet.error.status_code"); if (statusCode != null) { try { return HttpStatus.valueOf(statusCode); } catch (Exception ex) { } } return HttpStatus.INTERNAL_SERVER_ERROR; } }

这个类实现了ErrorController接口，用来处理请求的各种异常。当中定义了一个greeting的html模版，用来显示返回结果。初始化此类模版须要在pom中加入下面依赖：


                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-thymeleaf

这个依赖主要是给SpringBoot中载入html等类型的模版服务。其支持的模版类型例如以下：

Template modes:[THYMELEAF]     * XHTML[THYMELEAF]     * XML[THYMELEAF]     * HTML5[THYMELEAF]     * LEGACYHTML5[THYMELEAF]     * VALIDXHTML[THYMELEAF]     * VALIDXML

SpringBoot项目配置模版路径的方法例如以下：

1、在main的resources路径下新建templates目录

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2、在templates目录中新建模版文件greeting.html

Error Pages

3.0 处理结果

无效请求地址均会返回此页面，仅仅是当中的返回值不同。

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