jsp 往 FTP 上传文件问题

631jz5350x

　　FtpUtil:

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;


import sun.net.TelnetInputStream;
import sun.net.TelnetOutputStream;
import sun.net.ftp.FtpClient;
public class FtpUtil {
FtpClient ftpClient ;
/**
* connectServer
* 连接ftp服务器
* @throws java.io.IOException
* @param path 文件夹，空代表根目录
* @param password 密码
* @param user   登陆用户
* @param server 服务器地址
*/
public void connectServer(String server, String user, String password,  String path)
throws IOException  
{
// server：FTP服务器的IP地址；user:登录FTP服务器的用户名
// password：登录FTP服务器的用户名的口令；path：FTP服务器上的路径
ftpClient = new FtpClient();
ftpClient.openServer(server);
ftpClient.login(user, password);
//path是ftp服务下主目录的子目录
if (path.length() != 0)  ftpClient.cd(path);
//用2进制上传、下载
ftpClient.binary();      
}
public void connectServer() throws IOException  
{
// server：FTP服务器的IP地址；user:登录FTP服务器的用户名
// password：登录FTP服务器的用户名的口令；path：FTP服务器上的路径
ftpClient = new FtpClient();
ftpClient.openServer("221.193.212.119");
ftpClient.login("admin", "admin");
//path是ftp服务下主目录的子目录
ftpClient.cd("test");
//用2进制上传、下载
ftpClient.binary();      
}
/**
* upload
* 上传文件
* @throws java.lang.Exception
* @return -1 文件不存在
*          -2 文件内容为空  
*          >0 成功上传，返回文件的大小
* @param newname 上传后的新文件名
* @param filename 上传的文件
*/
public long upload(String filename,String newname) throws Exception  
{
long result = 0;
TelnetOutputStream os = null;
FileInputStream is = null;
try {   
connectServer();
java.io.File file_in = new java.io.File(filename);
if (!file_in.exists()) return -1;
if (file_in.length()==0) return -2;
os = ftpClient.put(newname);
result = file_in.length();
is = new FileInputStream(file_in);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
}finally {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
closeServer();
}
return result;
}
/**
* upload
* @throws java.lang.Exception
* @return  
* @param filename
*/
public long upload(String filename)
throws Exception  
{
String str = "";
System.out.println("11111");
if (filename.indexOf("/")>-1)
{
str = filename.substring(filename.lastIndexOf("/")+1);
}else
{
str = filename;
}
System.out.println("22222");
String suffix=filename.substring(filename.lastIndexOf("."),filename.length());
String md5=MD5Digest.Md5(str);
java.text.SimpleDateFormat simpledateformat;
simpledateformat = new java.text.SimpleDateFormat ("yyyyMMddhhmmssss");
Date dt=new Date();
String strDate=simpledateformat.format(dt);
String newname=strDate+md5+suffix;

System.out.println("filename:"+filename);
System.out.println("newname:"+newname);

return upload(filename,newname);
}
/**
*  download
*  从ftp下载文件到本地
* @throws java.lang.Exception
* @return  
* @param newfilename 本地生成的文件名
* @param filename 服务器上的文件名
*/
public long download(String filename,String newfilename)  
throws Exception
{   
long result = 0;
TelnetInputStream is = null;
FileOutputStream os = null;
try  
{
is = ftpClient.get(filename);        
java.io.File outfile = new java.io.File(newfilename);
os = new FileOutputStream(outfile);
byte[] bytes = new byte[1024];
int c;
while ((c = is.read(bytes)) != -1) {
os.write(bytes, 0, c);
result = result + c;
}
} catch (IOException e)  
{
e.printStackTrace();
}
finally {
if (is != null) {
is.close();
}
if (os != null) {
os.close();
}
}
return result;
}
/**
* 取得某个目录下的所有文件列表
*
*/
@SuppressWarnings({ "unchecked", "deprecation" })
public List getFileList(String path)
{
List list = new ArrayList();
try  
{
DataInputStream dis = new  DataInputStream(ftpClient.nameList(path));
String filename = "";
while((filename=dis.readLine())!=null)   
{   
list.add(filename);         
}   
} catch (Exception e)  
{
e.printStackTrace();
}
return list;
}
/**
* closeServer
* 断开与ftp服务器的链接
* @throws java.io.IOException
*/
public void closeServer()
throws IOException  
{   
try  
{
if (ftpClient != null)  
{
ftpClient.closeServer();      
}
} catch (IOException e) {
e.printStackTrace();
}
}
}



　　
　　Upload_append.jsp :

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="com.slwlsh.common.FtpUtil"%>
<%
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf8");
response.setCharacterEncoding("UTF-8");
String filename=request.getParameter("filename");
FtpUtil ftp=new FtpUtil();
Long result=ftp.upload(filename);
if(result>0){
out.print("OK");
}else{
out.print("shibai ");
}
%>

　　
　　
　　upload.jsp form

<form method="post"  action="Upload_append.jsp" >
<input type="file" name="filename"><BR />
<input type="submit" name="submit" value="上传">
</form>

　　
　　http://topic.csdn.net/u/20100227/15/abacab97-d49b-46b8-9689-3b2227ba52d3.html