struts2 文件下载 cpu 占用 100%,求解决方案

Question

xml

 

   <action name="L_download" class="cnydlanFileAction" method="download">
            <result name="success" type="stream">
                <param name="contentType">application/octet-stream;charset=ISO8859-1</param>
                <param name="inputName">inputStream</param>
                <param name="contentDisposition">attachment;filename="${downloadFileName}"</param>
                <param name="bufferSize">4096</param>
            </result>
        </action>

action

 

  /**
     * 处理中文下载名
     * @throws Exception 
     * 
     */
    public String getDownloadFileName() throws Exception {
        String named = new String(name.getBytes(), "ISO8859-1");
        if (zipName1.length() > 0){
            named = new String(zipName1.getBytes(), "ISO8859-1");
        }
        return named;
    }

    /**
     * 获得文件下载流
     */
    public InputStream getInputStream() throws Exception { 
        HttpServletRequest actionRequest = ServletActionContext.getRequest();
        Map session = (Map)ActionContext.getContext().getSession();
        String[] tt = getPaths();
        if (tt != null && tt.length > 0){
            this.paths = URLDecoder.decode(tt[0], "UTF-8").split(",");
            compressionFilesToTemparayPackage();
            String path1 = "";
            path1 = getTempPath() + zipName1;
            deleteZipFiles();
            InputStream in = new FileInputStream(path1); 
            return in;
        } else {
            logger.info("IP: " + actionRequest.getRemoteAddr() + " 开始下载文件" + name + " time: " + getTime());
            String path1 = "";
            String temproot = path;
            String para1 = getRoot();
            if (temproot.equals("*") == false){
                path1 = getRoot() + temproot + "\\" + name;
                para1 = getRoot() + temproot;
            } else { path1 = getRoot() + "\\" + name;}
            para1 = path1; //getFullPathSetDataBase(para1, name);
            markDownLoadInfo(para1, name);
            InputStream in = new FileInputStream(path1); 
            logger.info("IP: " + actionRequest.getRemoteAddr() + " 结束下载文件" + MyUtils.URLDecoder(name) + " time: " + getTime());
            return in;
        }
    }

    /**
     * 下载文件
     */
    public String download() {
        return SUCCESS;
    }

 

 

Answer 1

struts2的download是不会造成CPU负载过高的，你的代码中，有好几个方法：分别是压缩存放到临时文件夹（compressionFilesToTemparayPackage）、删除压缩后的文件（deleteZipFiles）、标记下载信息（markDownLoadInfo）。我建议你可以把这三个方法先去掉，然后逐个方法加入调试。这是个小问题，试试吧！