求struts2制作的代码

求用Struts2制作的文件上传下载功能的程序。

解决方案 »

  1.   

    http://www.iteye.com/topic/343832
      

  2.   

    common file upload 实现文件上传将commons-fileupload-1.2.jar和commons-io-1.3.2.jar导入到项目库文件目录lib下
     
    1、demo.html <html>
     <head>
     <meta http-equiv="Content-Type" content="text/html; charset=GB18030">
     <title>File upload</title>
     </head>
     <body>
     <form name="myform" action="fileupload" method="post" enctype="multipart/form-data">
       File:<br>
       <input type="file" name="myfile"><br><br>
       <input type="submit" name="submit" value="Commit">
     </form>
     </body>
     </html>
     
    2 、Upload.java
     
    package org.opensource.util
     
    import java.io.File;
     import java.io.IOException;
     import java.util.Iterator;
     import java.util.List;
     
    import javax.servlet.ServletException;
     import javax.servlet.http.HttpServlet;
     import javax.servlet.http.HttpServletRequest;
     import javax.servlet.http.HttpServletResponse;
     
    import org.apache.commons.fileupload.FileItem;
     import org.apache.commons.fileupload.disk.DiskFileItemFactory;
     import org.apache.commons.fileupload.servlet.ServletFileUpload;
     
    public class Upload extends HttpServlet {
      private String uploadPath = "D:\\upload\\"; // 上传文件的目录
     
     public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException {
       try {
        File tempfile = new File(System.getProperty("java.io.tmpdir"));//采用系统临时文件目录       
       DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();
        diskFileItemFactory.setSizeThreshold(4096);  // 设置缓冲区大小，这里是4kb
        diskFileItemFactory.setRepository(tempfile);  /设置缓冲区目录
        ServletFileUpload fu = new ServletFileUpload(diskFileItemFactory);
        fu.setSizeMax(4194304);
        List fileItems = fu.parseRequest(request);
        Iterator i = fileItems.iterator();
        while (i.hasNext()) {
         FileItem fi = (FileItem) i.next();
         String fileName = fi.getName();
         if (fileName != null) {
          File fullFile = new File(fi.getName());
          File savedFile = new File(uploadPath, fullFile.getName());
          fi.write(savedFile);
         }
        }
        System.out.println("upload succeed");
       } catch (Exception e) {
        e.printStackTrace();
       }
      }
     
     public void init() throws ServletException {
       File uploadPath = new File("D:\\upload");
       if (!uploadPath.exists()) {
        uploadPath.mkdirs();
       }
     
     }
     }
     
    3、web.xml
     
    <servlet></servlet>
           <servlet-name></servlet-name>Upload
           <servlet-class></servlet-class>org.opensource.util.Upload
         
       <servlet-mapping></servlet-mapping>
          <servlet-name></servlet-name>Upload
          <url-pattern></url-pattern>/fileupload