file控件点击浏览按钮，获取他选择文件的路径，然后根据这个路径读取文件里面的内容，将他显示到文本框里，怎么做啊求教
实现的功能是 点击浏览的时候你选择一个文件，这时候这个file控件里就有了选择的文件的路径，想通过这个路径，把选择的文件的内容读取到 文本框中，这个要怎么实现，求解啊~~
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- Java code
public class ImageServlet extends HttpServlet { /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); response.setCharacterEncoding("utf-8"); MultipartRequest mr = null; int maxPostSize = 1*100*1024*1024; String dir = getServletConfig().getServletContext().getRealPath("/uploadImage"); mr = new MultipartRequest(request,dir,maxPostSize,"utf-8"); Enumeration files = mr.getFileNames(); String fileName =""; String path = ""; while(files.hasMoreElements()){ fileName = files.nextElement().toString(); path = mr.getFilesystemName(fileName); File f = mr.getFile(fileName); if(f==null){ throw new ServletException("file is null"); } Date dt = new Date(System .currentTimeMillis()); SimpleDateFormat fmt = new SimpleDateFormat( "yyyyMMddHHmmssSSS"); String time = fmt.format(dt); String newName = time+f.getName().substring(path.lastIndexOf('.')); File newFile = new File(dir+"/"+newName); f.renameTo(newFile); System.out.println("newName:"+newName); System.out.println("filename:"+newFile.getName()); System.out.println("path:"+newFile.getPath()); } PrintWriter out = response.getWriter(); out.print("上传成功！"); }}