juqery文件下传 plupload java修改版

juqery文件上传 plupload java修改版

最近需要用到jquery文件上传插件，发现plupload这东西挺好的，奈何后台代码是php，tomcat得配置php才能跑起来，于是稍微研究了下，改成了java代码

plupload的特色是

1、可以配置chunk，将一个大文件分成许多小文件上传，后台通过php合并成大文件，这里通过相应的java代码

2、实际上传的文件名是经过生成唯一的uuid，通过参数name传递到后台

3、上传文件的过程是先上传临时命名为uuid的临时文件，上传成功后会自动生成几个input标签，对应上传之后的临时文件的文件名，之后通过另一个action调用uploadFinish对临时文件进行重命名操作或者其他操作

这个java代码是基于 Struts2的，不是servlet，反正都是类似的在这基础上也容易改

public class UploadAction extends ActionSupport {       private static final int BUFFER_SIZE = 2 * 1024;private File upload;        private String name;  //plupload上传文件的临时文件名 uuid.文件后缀private String uploadFileName;private String uploadContentType;private int chunk;private int chunks;// 。。。一堆getter setter自己生成        private void copy(File src, File dst) {InputStream in = null;OutputStream out = null;try {if (dst.exists()) {out = new BufferedOutputStream(new FileOutputStream(dst, true),BUFFER_SIZE);  //plupload 配置了chunk的时候新上传的文件appand到文件末尾} else {out = new BufferedOutputStream(new FileOutputStream(dst),BUFFER_SIZE);}in = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE);byte[] buffer = new byte[BUFFER_SIZE];int len = 0;while ((len = in.read(buffer)) &gt; 0) {out.write(buffer, 0, len);}} catch (Exception e) {e.printStackTrace();} finally {if (null != in) {try {in.close();} catch (IOException e) {e.printStackTrace();}}if (null != out) {try {out.close();} catch (IOException e) {e.printStackTrace();}}}}        public String upload() throws Exception {String dstPath = ServletActionContext.getServletContext().getRealPath("\\tmp")+ "\\" + this.getName();  // 保存目录可以自己配置 或者定义变量自行配置File dstFile = new File(dstPath);// 文件已存在删除旧文件（上传了同名的文件）if (chunk == 0 && dstFile.exists()) {dstFile.delete();dstFile = new File(dstPath);}copy(this.upload, dstFile);               //System.out.println(uploadFileName + " " + uploadContentType + " "+ chunk + " " + chunks);if (chunk == chunks - 1) {// 一个完整的文件上传完成}return SUCCESS;}public String uploadFinish() {String dstPath = ServletActionContext.getServletContext().getRealPath("\\tmp");HttpServletRequest request = ServletActionContext.getRequest();int count = Integer.parseInt(request.getParameter("uploader_count"));for (int i = 0; i &lt; count; i++) {uploadFileName = request.getParameter("uploader_" + i + "_name");name = request.getParameter("uploader_" + i + "_tmpname");System.out.println(uploadFileName + " " + name);try {//对已经上传成功的临时文件进行操作                        } catch(Exception e) {}}return SUCCESS;}}

补充：

从项目里抽取出了文件上传的代码，单独一个eclipse上可以跑的例子，上传上来了(注意build path里的jre路径)

原创，欢迎转载，请标明源

http://asyty.iteye.com/blog/1230119/

8 楼 dyyweb 2012-08-22 发给我一份急用拜求 275001477@qq.com

juqery文件下传 plupload java修改版

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