文件下传乱码有关问题

    public String upFile() throws Exception{            String targetURL = null;// TODO 指定URL           File targetFile = null;// TODO 指定上传文件           System.out.println(config.getPath());           String str= new String(config.getPath().getBytes("iso8859-1"), "utf-8");            config.setPath(str);                      targetFile = new File(config.getPath());           targetURL = "http://localhost:8081/ftoa/upload"; //servleturl           PostMethod filePost = new PostMethod(targetURL);           System.out.println(targetFile);           System.out.println(config.getPath());           System.out.println(filePost);           try           {            //通过以下方法可以模拟页面参数提交          //  filePost.setParameter("name", "中文");         //  filePost.setParameter("pass", "1234");            System.out.println(targetFile.getName());           Part[] parts = { new FilePart(targetFile.getName(), targetFile) };            filePost.setRequestEntity(new MultipartRequestEntity(parts,filePost.getParams()));                        HttpClient client = new HttpClient();            client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);            int status = client.executeMethod(filePost);            if (status == HttpStatus.SC_OK)            {             System.out.println("上传成功");             configService.updataInfo(config);             // 上传成功            }            else            {             System.out.println("上传失败");             // 上传失败            }           }           catch (Exception ex)           {            ex.printStackTrace();           }           finally           {            filePost.releaseConnection();           }        return null;        }

public void doPost(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException{      response.setCharacterEncoding("UTF-8");      request.setCharacterEncoding("UTF-8");     try   {       File tempfile = new File(System.getProperty("java.io.tmpdir")); // 采用系统临时文件目录      DiskFileItemFactory factory = new DiskFileItemFactory();    factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb    factory.setRepository(tempfile);// 设置缓冲区目录 tempPathFile    ServletFileUpload upload = new ServletFileUpload(factory);    upload.setSizeMax(4194304); // 设置最大文件尺寸，这里是4MB    List<FileItem> items = upload.parseRequest(request);// 得到所有的文件   文件名是？？？？    Iterator<FileItem> i = items.iterator();    while (i.hasNext())    {     FileItem fi = (FileItem) i.next();     fi.getString("UTF-8");      String fileName = fi.getName();     //     response.setHeader("Content-disposition", "attachment;filename="//                + URLEncoder.encode(fileName, "UTF-8"));          String str= new String(fileName.getBytes("ISO8859_1"), "utf-8");      fileName=str;     System.out.println(fileName);//都是问号?????.txt      if (fileName != null)     {      File fullFile = new File(fi.getName());      File savedFile = new File(uploadPath, fullFile.getName());      fi.write(savedFile);     }    }    System.out.print("upload succeed");   }   catch (Exception e)   {    System.out.println(e.getMessage());    // 可以跳转出错页面    e.printStackTrace();   }}