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ftp取文件java代码 ftps java
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用java怎么获取ftp上的文件
public class FtpClientUtil {
FtpClient ftpClient;
private String server;
private int port;
private String userName;
private String userPassword;
public FtpClientUtil(String server,int port,String userName,String userPassword)
{
this.server=server;
this.port=port;
this.userName=userName;
this.userPassword=userPassword;
}
/**
* 链接到服务器
* @return
*/
public boolean open()
{
if(ftpClient!=nullftpClient.serverIsOpen())
return true;
try
{
ftpClient= new FtpClient();
ftpClient.openServer(server,port);
ftpClient.login(userName, userPassword);
ftpClient.binary();
return true;
}
catch(Exception e)
{
e.printStackTrace();
ftpClient=null;
return false;
}
}
public boolean cd(String dir){
boolean f = false;
try {
ftpClient.cd(dir);
} catch (IOException e) {
Logs.error(e.toString());
return f;
}
return true;
}
/**
* 上传文件到FTP服务器
* @param localPathAndFileName 本地文件目录和文件名
* @param ftpFileName 上传后ftp取文件java代码的文件名
* @param ftpDirectory FTP目录如:/path1/pathb2/,如果目录不存在回自动创建目录
* @throws Exception
*/
public boolean upload(String localDirectoryAndFileName,String ftpFileName,String ftpDirectory)throws Exception {
if(!open())
return false;
FileInputStream is=null;
TelnetOutputStream os=null;
try
{
char ch = ' ';
if (ftpDirectory.length() 0)
ch = ftpDirectory.charAt(ftpDirectory.length() - 1);
for (; ch == '/' || ch == '\\'; ch = ftpDirectory.charAt(ftpDirectory.length() - 1))
ftpDirectory = ftpDirectory.substring(0, ftpDirectory.length() - 1);
int slashIndex = ftpDirectory.indexOf(47);
int backslashIndex = ftpDirectory.indexOf(92);
int index = slashIndex;
String dirall = ftpDirectory;
if (backslashIndex != -1 (index == -1 || index backslashIndex))
index = backslashIndex;
String directory = "";
while (index != -1) {
if (index 0) {
String dir = dirall.substring(0, index);
directory = directory + "/" + dir;
ftpClient.sendServer("XMKD " + directory + "\r\n");
ftpClient.readServerResponse();
}
dirall = dirall.substring(index + 1);
slashIndex = dirall.indexOf(47);
backslashIndex = dirall.indexOf(92);
index = slashIndex;
if (backslashIndex != -1 (index == -1 || index backslashIndex))
index = backslashIndex;
}
ftpClient.sendServer("XMKD " + ftpDirectory + "\r\n");
ftpClient.readServerResponse();
os = ftpClient.put(ftpDirectory + "/"
+ ftpFileName);
File file_in = new File(localDirectoryAndFileName);
is = new FileInputStream(file_in);
byte bytes[] = new byte[1024];
int i;
while ((i = is.read(bytes)) != -1)
os.write(bytes, 0, i);
//清理垃圾
return true;
}
catch(Exception e)
{
e.printStackTrace();
return false;
}
finally
{
if (is != null)
is.close();
if (os != null)
os.close();
}
}
/**
* 从FTP服务器上下载文件并返回下载文件长度
* @param ftpDirectoryAndFileName
* @param localDirectoryAndFileName
* @return
* @throws Exception
*/
public long download(String ftpDirectoryAndFileName,String localDirectoryAndFileName)throws Exception
{
long result = 0;
if(!open())
return result;
TelnetInputStream is = null;
FileOutputStream os = null;
try
{
is = ftpClient.get(ftpDirectoryAndFileName);
java.io.File outfile = new java.io.File(localDirectoryAndFileName);
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 (Exception e)
{
throw e;
}
finally
{
if (is != null)
is.close();
if (os != null)
os.close();
}
return result;
}
/**
* 返回FTP目录下的文件列表
* @param ftpDirectory
* @return
*/
public ListString getFileNameList(String ftpDirectory)
{
ListString list = new ArrayListString();
if(!open())
return list;
try
{
DataInputStream dis = new DataInputStream(ftpClient.nameList(ftpDirectory));
String filename = "";
while((filename=dis.readLine())!=null)
{
list.add(filename);
}
} catch (Exception e)
{
e.printStackTrace();
}
return list;
}
/**
* 删除FTP上的文件
* @param ftpDirAndFileName
*/
public boolean deleteFile(String ftpDirAndFileName)
{
if(!open())
return false;
ftpClient.sendServer("DELE "+ftpDirAndFileName+"\r\n");
return true;
}
/**
* 删除FTP目录
* @param ftpDirectory
*/
public boolean deleteDirectory(String ftpDirectory)
{
if(!open())
return false;
ftpClient.sendServer("XRMD "+ftpDirectory+"\r\n");
return true;
}
/**
* 关闭链接
*/
public void close()
{
try
{
if(ftpClient!=nullftpClient.serverIsOpen())
ftpClient.closeServer();
}catch(Exception e)
{
}
}
}望采纳ftp取文件java代码，谢谢。
相关问答
Q1: java获取ftp文件路径怎么写
package com.weixin.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import org.apache.commons.net.PrintCommandListener;
import org.apache.commons.net.;
import org.apache.commons.net.;
import org.apache.commons.net.;
import org.apache.commons.net.;
import com.weixin.constant.DownloadStatus;
import com.weixin.constant.UploadStatus;
/**
* 支持断点续传的FTP实用类
* @version 0.1 实现基本断点上传下载
* @version 0.2 实现上传下载进度汇报
* @version 0.3 实现中文目录创建及中文文件创建，添加对于中文的支持
*/
public class ContinueFTP {
public FTPClient ftpClient = new FTPClient();
public ContinueFTP(){
//设置将过程中使用到的命令输出到控制台
this.ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
}
/**
* 连接到FTP服务器
* @param hostname 主机名
* @param port 端口
* @param username 用户名
* @param password 密码
* @return 是否连接成功
* @throws IOException
*/
public boolean connect(String hostname,int port,String username,String password) throws IOException{
ftpClient.connect(hostname, port);
ftpClient.setControlEncoding("GBK");
if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){
if(ftpClient.login(username, password)){
return true;
}
}
disconnect();
return false;
}
/**
* 从FTP服务器上下载文件,支持断点续传，上传百分比汇报
* @param remote 远程文件路径
* @param local 本地文件路径
* @return 上传的状态
* @throws IOException
*/
public DownloadStatus download(String remote,String local) throws IOException{
//设置被动模式
ftpClient.enterLocalPassiveMode();
//设置以二进制方式传输
ftpClient.setFileType();
DownloadStatus result;
//检查远程文件是否存在
FTPFile[] files = ftpClient.listFiles(new String(remote.getBytes("GBK"),"iso-8859-1"));
if(files.length != 1){
System.out.println("远程文件不存在");
return DownloadStatus.Remote_File_Noexist;
}
long lRemoteSize = files[0].getSize();
File f = new File(local);
//本地存在文件，进行断点下载
if(f.exists()){
long localSize = f.length();
//判断本地文件大小是否大于远程文件大小
if(localSize = lRemoteSize){
System.out.println("本地文件大于远程文件，下载中止");
return DownloadStatus.Local_Bigger_Remote;
}
//进行断点续传，并记录状态
FileOutputStream out = new FileOutputStream(f,true);
ftpClient.setRestartOffset(localSize);
InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1"));
byte[] bytes = new byte[1024];
long step = lRemoteSize /100;
long process=localSize /step;
int c;
while((c = in.read(bytes))!= -1){
out.write(bytes,0,c);
localSize+=c;
long nowProcess = localSize /step;
if(nowProcess process){
process = nowProcess;
if(process % 10 == 0)
System.out.println("下载进度："+process);
//TODO 更新文件下载进度,值存放在process变量中
}
}
in.close();
out.close();
boolean isDo = ftpClient.completePendingCommand();
if(isDo){
result = DownloadStatus.Download_From_Break_Success;
}else {
result = DownloadStatus.Download_From_Break_Failed;
}
}else {
OutputStream out = new FileOutputStream(f);
InputStream in= ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1"));
byte[] bytes = new byte[1024];
long step = lRemoteSize /100;
long process=0;
long localSize = 0L;
int c;
while((c = in.read(bytes))!= -1){
out.write(bytes, 0, c);
localSize+=c;
long nowProcess = localSize /step;
if(nowProcess process){
process = nowProcess;
if(process % 10 == 0)
System.out.println("下载进度："+process);
//TODO 更新文件下载进度,值存放在process变量中
}
}
in.close();
out.close();
boolean upNewStatus = ftpClient.completePendingCommand();
if(upNewStatus){
result = DownloadStatus.Download_New_Success;
}else {
result = DownloadStatus.Download_New_Failed;
}
}
return result;
}
/**
* 上传文件到FTP服务器，支持断点续传
* @param local 本地文件名称，绝对路径
* @param remote 远程文件路径，使用/home/directory1/subdirectory/file.ext 按照Linux上的路径指定方式，支持多级目录嵌套，支持递归创建不存在的目录结构
* @return 上传结果
* @throws IOException
*/
public UploadStatus upload(String local,String remote) throws IOException{
//设置PassiveMode传输
ftpClient.enterLocalPassiveMode();
//设置以二进制流的方式传输
ftpClient.setFileType();
ftpClient.setControlEncoding("GBK");
UploadStatus result;
//对远程目录的处理
String remoteFileName = remote;
if(remote.contains("/")){
remoteFileName = remote.substring(remote.lastIndexOf("/")+1);
//创建服务器远程目录结构，创建失败直接返回
if(CreateDirecroty(remote, ftpClient)==UploadStatus.Create_Directory_Fail){
return UploadStatus.Create_Directory_Fail;
}
}
//检查远程是否存在文件
FTPFile[] files = ftpClient.listFiles(new String(remoteFileName.getBytes("GBK"),"iso-8859-1"));
if(files.length == 1){
long remoteSize = files[0].getSize();
File f = new File(local);
long localSize = f.length();
if(remoteSize==localSize){
return UploadStatus.File_Exits;
}else if(remoteSize localSize){
return UploadStatus.Remote_Bigger_Local;
}
//尝试移动文件内读取指针,实现断点续传
result = uploadFile(remoteFileName, f, ftpClient, remoteSize);
//如果断点续传没有成功，则删除服务器上文件，重新上传
if(result == UploadStatus.Upload_From_Break_Failed){
if(!ftpClient.deleteFile(remoteFileName)){
return UploadStatus.Delete_Remote_Faild;
}
result = uploadFile(remoteFileName, f, ftpClient, 0);
}
}else {
result = uploadFile(remoteFileName, new File(local), ftpClient, 0);
}
return result;
}
/**
* 断开与远程服务器的连接
* @throws IOException
*/
public void disconnect() throws IOException{
if(ftpClient.isConnected()){
ftpClient.disconnect();
}
}
/**
* 递归创建远程服务器目录
* @param remote 远程服务器文件绝对路径
* @param ftpClient FTPClient对象
* @return 目录创建是否成功
* @throws IOException
*/
public UploadStatus CreateDirecroty(String remote,FTPClient ftpClient) throws IOException{
UploadStatus status = UploadStatus.Create_Directory_Success;
String directory = remote.substring(0,remote.lastIndexOf("/")+1);
if(!directory.equalsIgnoreCase("/")!ftpClient.changeWorkingDirectory(new String(directory.getBytes("GBK"),"iso-8859-1"))){
//如果远程目录不存在，则递归创建远程服务器目录
int start=0;
int end = 0;
if(directory.startsWith("/")){
start = 1;
}else{
start = 0;
}
end = directory.indexOf("/",start);
while(true){
String subDirectory = new String(remote.substring(start,end).getBytes("GBK"),"iso-8859-1");
if(!ftpClient.changeWorkingDirectory(subDirectory)){
if(ftpClient.makeDirectory(subDirectory)){
ftpClient.changeWorkingDirectory(subDirectory);
}else {
System.out.println("创建目录失败");
return UploadStatus.Create_Directory_Fail;
}
}
start = end + 1;
end = directory.indexOf("/",start);
//检查所有目录是否创建完毕
if(end = start){
break;
}
}
}
return status;
}
/**
* 上传文件到服务器,新上传和断点续传
* @param remoteFile 远程文件名，在上传之前已经将服务器工作目录做了改变
* @param localFile 本地文件File句柄，绝对路径
* @param processStep 需要显示的处理进度步进值
* @param ftpClient FTPClient引用
* @return
* @throws IOException
*/
public UploadStatus uploadFile(String remoteFile,File localFile,FTPClient ftpClient,long remoteSize) throws IOException{
UploadStatus status;
//显示进度的上传
long step = localFile.length() / 100;
long process = 0;
long localreadbytes = 0L;
RandomAccessFile raf = new RandomAccessFile(localFile,"r");
OutputStream out = ftpClient.appendFileStream(new String(remoteFile.getBytes("GBK"),"iso-8859-1"));
//断点续传
if(remoteSize0){
ftpClient.setRestartOffset(remoteSize);
process = remoteSize /step;
raf.seek(remoteSize);
localreadbytes = remoteSize;
}
byte[] bytes = new byte[1024];
int c;
while((c = raf.read(bytes))!= -1){
out.write(bytes,0,c);
localreadbytes+=c;
if(localreadbytes / step != process){
process = localreadbytes / step;
System.out.println("上传进度:" + process);
//TODO 汇报上传状态
}
}
out.flush();
raf.close();
out.close();
boolean result =ftpClient.completePendingCommand();
if(remoteSize 0){
status = result?UploadStatus.Upload_From_Break_Success:UploadStatus.Upload_From_Break_Failed;
}else {
status = result?UploadStatus.Upload_New_File_Success:UploadStatus.Upload_New_File_Failed;
}
return status;
}
public static void main(String[] args) {
ContinueFTP myFtp = new ContinueFTP();
try {
System.err.println(my("10.10.6.236", 21, "5", "jieyan"));
// my(new String("歌曲".getBytes("GBK"),"iso-8859-1"));
// my(new String("歌曲".getBytes("GBK"),"iso-8859-1"));
// my(new String("爱你等于爱自己".getBytes("GBK"),"iso-8859-1"));
// System.out.println(my("E:\\yw.flv", "/yw.flv",5));
// System.out.println(my("E:\\爱你等于爱自己.mp4","/爱你等于爱自己.mp4"));
//System.out.println(my("/爱你等于爱自己.mp4", "E:\\爱你等于爱自己.mp4"));
my;
} catch (IOException e) {
System.out.println("连接FTP出错："+e.getMessage());
}
}
}
Q2: 求每日定时在服务器的FTP上取数据文件的源码(JAVA)
这个是可以向服务器端发送文字的程序，就是在客户端发送一句hello在服务器也可以接受到hello，这个程序可以修改一下就可以了。具体修改方法是增加一个定时器，然后把字符流改成字节流,现在有点忙，你先研究啊，近两天帮你写写看。
服务器端：
import java.net.*;
import java.io.*;
public class DateServer {
public static void main(String[] args) {
ServerSocket server=null;
try{
server=new ServerSocket(6666);
System.out.println(
"Server start on port 6666...");
while(true){
Socket socket=server.accept();
new SocketHandler(socket).start();
/*
PrintWriter out=new PrintWriter(
new OutputStreamWriter(
socket.getOutputStream()
)
);
out.println(new java.util.Date().toLocaleString());
out.close();
*/
}
}catch(Exception e){
e.printStackTrace();
}finally{
if(server!=null) {
try{
server.close();
}catch(Exception ex){}
}
}
}
}
class SocketHandler extends Thread {
private Socket socket;
public SocketHandler(Socket socket) {
this.socket=socket;
}
public void run() {
try{
PrintWriter out=new PrintWriter(
new OutputStreamWriter(
socket.getOutputStream()
)
);
out.println(
new java.util.Date().
toLocaleString());
out.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
客户端：
package com.briup;
import java.io.*;
import java.net.*;
public class FtpClient {
public static void main(String[] args) {
if(args.length==0) {
System.out.println("Usage:java FtpClient file_path");
System.exit(0);
}
File file=new File(args[0]);
if(!file.exists()||!file.canRead()) {
System.out.println(args[0]+" doesn't exist or can not read.");
System.exit(0);
}
Socket socket=null;
try{
socket=new Socket(args[1],Integer.parseInt(args[2]));
BufferedInputStream in=new BufferedInputStream(
new FileInputStream(file)
);
BufferedOutputStream out=new BufferedOutputStream(
socket.getOutputStream()
);
byte[] buffer=new byte[1024*8];
int i=-1;
while((i=in.read(buffer))!=-1) {
out.write(buffer,0,i);
}
System.out.println(socket.getInetAddress().getHostAddress()+" send file over.");
in.close();
out.close();
}catch(Exception e){
e.printStackTrace();
}finally{
if(socket!=null) {
try{
socket.close();
}catch(Exception ex){}
}
}
}
}
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