javax.servlet.ServletException: ClientAbortException:  java.net.SocketException: Broken pipe错误完美解决

现在百度太垃圾了，啥都搜不出来，啥时候才能上google,简直成一个梦想了

用chrome跟踪发现下载文件时出现如下错误：

错误 349 (net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION)：我们收到了多个“Content-Disposition”标头。我们不允许此行为，以防遭到 HTTP 响应拆分攻击。

原代码为:

public String downloadFile() throws Exception {
  HttpServletResponse response = ServletActionContext.getResponse();
  HttpSession session = HttpRequester.getHttpSession();
  Object su = session.getAttribute("ACCOUNT");
  if (su == null) {
   System.out.println("session超时");
   throw new Exception("session超时");
  }
  taskResultExcel = downloadFile.substring(downloadFile.lastIndexOf("/")+1, downloadFile.length());
  response.setContentType("application/vnd.ms-excel");
  response.setHeader("Content-Disposition", "attachment;filename=\""+ taskResultExcel + "\"");
  response.setHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0");
  response.setHeader("Pragma", "public");
  return SUCCESS;
 }

修改为如下代码即可解决

Caused by: ClientAbortException:  java.net.SocketException: Broken pipe

public String download() {
  HttpServletResponse response = getResponse();
  String flag = SUCCESS;
  log.info("下载的文件为: " + downloadFile);
        try {
            String filePath2 = ServletActionContext.getServletContext().getRealPath("/"); //取当前系统路径
            // path是指欲下载的文件的路径。在path 路径下创建名为
//            File file = new File(filePath2 + "zjh/下载.xls");
            File file = new File(filePath2 + downloadFile);
            if (!file.exists()){
             log.info("文件没有找到：" + downloadFile);
                flag = null;
            }
            // 取得文件名。
            String filename = file.getName();
            // 取得文件的后缀名。
            String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();

// 以流的形式下载文件。
//            InputStream fis = new BufferedInputStream(new FileInputStream(filePath2 + "zjh/下载.xls"));
            InputStream fis = new BufferedInputStream(new FileInputStream(new File(filePath2 + downloadFile)));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            // 清空response
            taskResultExcel = downloadFile.substring(downloadFile.lastIndexOf("/")+1, downloadFile.length());
            log.info("页面文件为： " + taskResultExcel);
            response.reset();
            response.addHeader("Content-Disposition", "attachment;filename="+ java.net.URLEncoder.encode(taskResultExcel,"utf-8"));
            response.addHeader("Content-Length", "" + file.length());

OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream");
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (IOException ex) {
            log.info("下载文件出现异常" + ex.getMessage());
            flag = null;
        }
        //        return response;
        return flag;
    }