调用其他系统的servlet_外围系统调本系统的servlet-优快云博客

本文链接：https://blog.youkuaiyun.com/csq2009/article/details/6988683

该博客介绍了如何通过HTTP客户端执行POST请求调用其他系统的Servlet，并处理返回的内容。在执行过程中，如果状态码不是200，会抛出异常。同时，博客还展示了如何从响应流中读取内容并进行日志记录。在异常情况下，也进行了时间戳的日志记录。

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/**
* @param request
* @return
* @throws Exception
*/
public void saveAllian4AnLian(HttpServletRequest request,HttpServletResponse response){
  long startTime1 = System.currentTimeMillis();
  //ResAGA01001 res = new ResAGA01001();
  //res.setIfSuccess("1");
  String responseBody = "";
  try {
   response.setContentType("text/html;charset=UTF-8");
   request.setCharacterEncoding("UTF-8");
   Protocol myhttps = new Protocol("https", new MySecureProtocolSocketFactory(), 443);
   Protocol.registerProtocol("https", myhttps);
   // 构造HttpClient的实例
   HttpClient httpClient = new HttpClient();
   //链接超时
   httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(20000);
   //读取超时
   httpClient.getHttpConnectionManager().getParams().setSoTimeout(20000);
   // 设置字符，可发送中文
   httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"utf-8");
  String strUrl = " https://";
   PostMethod postMethod = new PostMethod(strUrl);
   // 设置字符，可发送中文
   postMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"utf-8");
   // 使用系统提供的默认的恢复策略
   postMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
     new DefaultHttpMethodRetryHandler());
   if(StringUtils.isNotBlank(request.getParameter("TicketID"))){
    postMethod.addParameter("message",request.getParameter("("message"));
   }

   。。。。。。。
   // 执行postMethod
   //   int statusCode=0;
   int statusCode = httpClient.executeMethod(postMethod);
   if (statusCode != HttpStatus.SC_OK) {

        throw new Exception("Method failed: "+ postMethod.getStatusLine());
   }
   // 读取内容
   responseBody = new String(inputStream2Byte(postMethod.getResponseBodyAsStream()));
   // res.setMessage(responseBody);
   // 处理内容
   long endTime = System.currentTimeMillis();
   logger.warn("==================== " + (endTime - startTime1) + " ms");
   response.getWriter().write(responseBody);
  } catch (Exception e) {
   long endTime = System.currentTimeMillis();
   logger.warn("==================== " + (endTime - startTime1) + " ms");
  }
  }