File:
 
    
 
    
 
     
   

web.xml里加上下面几行：

 
 Upload 
 am.demo.Upload 
  
  
 Upload 
 /fileupload 
  

src目录下新建文件Upload.java：

package am.demo; 

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; 

@SuppressWarnings("serial") 
public class Upload extends HttpServlet { 
  private String uploadPath = "d://temp"; // 上传文件的目录 

  @SuppressWarnings("unchecked") 
  public void doPost(HttpServletRequest request, HttpServletResponse response) 
      throws IOException, ServletException { 
    try { 
      // Create a factory for disk-based file items 
      DiskFileItemFactory factory = new DiskFileItemFactory(); 

      // Create a new file upload handler 
      ServletFileUpload upload = new ServletFileUpload(factory); 

      List items = upload.parseRequest(request);// 得到所有的文件 
      Iterator i = items.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); 
        } 
      } 

      response.setContentType("text/html;charset=GBK");  
      response.getWriter().print( 
      ""); 
    } catch (Exception e) { 
      // 可以跳转出错页面 
      e.printStackTrace(); 
    } 
  } 

  public void init() throws ServletException { 
    File uploadFile = new File(uploadPath); 
    if (!uploadFile.exists()) { 
      uploadFile.mkdirs(); 
    } 
  } 
} 

再看下载Downlaod.java:

package am.demo; 

import java.io.File; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.io.OutputStream; 

import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 

@SuppressWarnings("serial") 
public class Download extends HttpServlet { 
  public void doGet(HttpServletRequest request, HttpServletResponse response) 
      throws IOException, ServletException { 

    String aFileName = new String(request.getParameter("name").getBytes( 
        "iso8859-1"), "gbk"); 

    File fileLoad = new File("d:/temp", aFileName); 

    FileInputStream in = null; // 输入流 
    OutputStream out = response.getOutputStream(); 
    byte b[] = new byte[1024]; 

    try { 

       response.setContentType("application/x-msdownload;"); 

      response.setHeader("Content-disposition", "attachment; filename=" 
          + new String(aFileName.getBytes("GBK"), "ISO-8859-1")); 

      // download the file. 
      in = new FileInputStream(fileLoad); 
      int n = 0; 
      while ((n = in.read(b)) != -1) { 
        out.write(b, 0, n); 
      } 

    } catch (Throwable e) { 
      e.printStackTrace(); 
    } finally { 
      try { 
        in.close(); 
        out.close(); 
      } catch (Throwable e) { 
        e.printStackTrace(); 
      } 
    } 
  } 

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

} 

删除Delete.java:

package am.demo; 

import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.IOException; 

import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 

@SuppressWarnings("serial") 
public class Delete extends HttpServlet { 

  public void doGet(HttpServletRequest request, HttpServletResponse response) 
      throws FileNotFoundException, IOException { 

    String aFileName = new String(request.getParameter("name").getBytes( 
        "iso8859-1"), "gbk"); 

    File file = new File("d:/temp", aFileName); 

    response.setContentType("text/html;charset=GBK"); 

    if (!file.isDirectory()) { 
      file.delete(); 
      response.getWriter().print( 
        ""); 
    } else { 

    } 

  } 

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

 因为ubuntu server是黑屏，本人用的是ubuntu server10.04，不方便用浏览器来查看文件，因为没有图形界面，也不方便调试，所以可以先在windows上测试通过，然后把相应文件拷到ubuntu server中的tomcat相应目录下，可以通过samba来传文件，但遇到一个问题，就是中文乱码的问题，因为在开始安装时，选的是英文，后面用网上的一些办法，还是没有解决中文乱码的问题，有知道的大侠，还烦请转告。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持本站。

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