文�g上传(FileUpload)

Sun, 08 Nov 2009 08:30:00 GMT

1.使用JAR
jsp文�g上传主要使用了两个jar包，commons-fileupload-1.2.1.jar和commons-io-1.4.jar
2.代码实现
public class UploadServlet extends HttpServlet {

/**
*
*/
private static final long serialVersionUID = 1L;

private ServletContext sc;

private String savePath;

@Override
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}

@Override
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {

System.out.println("��h��q�来�?.........");

// 讄��h��的编�?br /> request.setCharacterEncoding("UTF-8");

DiskFileItemFactory factory = new DiskFileItemFactory();//创徏一个磁盘文件工�?br /> ServletFileUpload upload = new ServletFileUpload(factory);

  try {
   List items = upload.parseRequest(request);
   Iterator it = items.iterator();
   while (it.hasNext()) {
    FileItem item = (FileItem) it.next();

    if (item.isFormField()) {
     System.out.println("表单的参数名�U�ͼ�" + item.getFieldName()
       + ",对应的参数��|��" + item.getString("UTF-8"));
    } else {
     // 获取文�g扩展�?br />     String strtype = item.getName().substring(
       item.getName().length() - 3,
       item.getName().length());
     strtype = strtype.toLowerCase();

     if (strtype == "jpg" || strtype == "gif"
       || strtype == "txt") {
      if (item.getName() != null
        && !item.getName().equals("")) {
       System.out.println("上传文�g的大��：" + item.getSize());
       System.out.println("上传文�g的类型："
         + item.getContentType());
       System.out.println("上传文�g的名�U�ͼ�" + item.getName());

       System.out.println("文�g的扩展名" + strtype);
       File tempFile = new File(item.getName());
       File file = new File(
         sc.getRealPath("/") + savePath, tempFile
           .getName());
       item.write(file);

request.setAttribute("upload.message", "上传文�g成功�Q?);

      } else {
       request.setAttribute("upload.message",
         "没有选择上传文�g获取格式不支�?);
      }
     } else {
      request.setAttribute("upload.message", "上传文�g格式不支�?);
     }
    }
   }
  } catch (Exception e) {
   e.printStackTrace();
   request.setAttribute("upload.message", "上传文�g不成功！");
  }
  // 转发
  request.getRequestDispatcher("/uploadResult.jsp").forward(request,
    response);
}

@Override
public void init(ServletConfig config) throws ServletException {

savePath = config.getInitParameter("savePath");
sc = config.getServletContext();
}

IT�q�求�?/a> 2009-11-08 16:30 发表评论

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文�g上传(FileUpload)