商业源码 java 怎么从ftp获取文件路径
拿去用吧。
package comweixinutil;import javaioFile;
import javaioFileOutputStream;
import javaioIOException;
import javaioInputStream;
import javaioOutputStream;
import javaioPrintWriter;
import javaioRandomAccessFile;
import orgapachecommonsnetPrintCommandListener;
import orgapachecommonsnetftpFTP;
import orgapachecommonsnetftpFTPClient;
import orgapachecommonsnetftpFTPFile;
import orgapachecommonsnetftpFTPReply;
import comweixinconstantDownloadStatus;
import comweixinconstantUploadStatus;
/
支持断点续传的FTP实用类
@version 01 实现基本断点上传下载
@version 02 实现上传下载进度汇报
@version 03 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
thisftpClientaddProtocolCommandListener(new PrintCommandListener(new PrintWriter(Systemout)));
}
/
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{
ftpClientconnect(hostname, port);
ftpClientsetControlEncoding("GBK");
if(FTPReplyisPositiveCompletion(ftpClientgetReplyCode())){
if(ftpClientlogin(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
ftpCliententerLocalPassiveMode();
//设置以二进制方式传输
ftpClientsetFileType(FTPBINARY_FILE_TYPE);
DownloadStatus result;
//检查远程文件是否存在
FTPFile[] files = ftpClientlistFiles(new String(remotegetBytes("GBK"),"iso-8859-1"));
if(fileslength != 1){
Systemoutprintln("远程文件不存在");
return DownloadStatusRemote_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(fexists()){
long localSize = flength();
//判断本地文件大小是否大于远程文件大小
if(localSize >= lRemoteSize){
Systemoutprintln("本地文件大于远程文件，下载中止");
return DownloadStatusLocal_Bigger_Remote;
}
//进行断点续传，并记录状态
FileOutputStream out = new FileOutputStream(f,true);
ftpClientsetRestartOffset(localSize);
InputStream in = ftpClientretrieveFileStream(new String(remotegetBytes("GBK"),"iso-8859-1"));
byte[] bytes = new byte[1024];
long step = lRemoteSize /100;
long process=localSize /step;
int c;
while((c = inread(bytes))!= -1){
outwrite(bytes,0,c);
localSize+=c;
long nowProcess = localSize /step;
if(nowProcess > process){
process = nowProcess;
if(process % 10 == 0)
Systemoutprintln("下载进度："+process);
//TODO 更新文件下载进度,值存放在process变量中
}
}
inclose();
outclose();
boolean isDo = ftpClientcompletePendingCommand();
if(isDo){
result = DownloadStatusDownload_From_Break_Success;
}else {
result = DownloadStatusDownload_From_Break_Failed;
}
}else {
OutputStream out = new FileOutputStream(f);
InputStream in= ftpClientretrieveFileStream(new String(remotegetBytes("GBK"),"iso-8859-1"));
byte[] bytes = new byte[1024];
long step = lRemoteSize /100;
long process=0;
long localSize = 0L;
int c;
while((c = inread(bytes))!= -1){
outwrite(bytes, 0, c);
localSize+=c;
long nowProcess = localSize /step;
if(nowProcess > process){
process = nowProcess;
if(process % 10 == 0)
Systemoutprintln("下载进度："+process);
//TODO 更新文件下载进度,值存放在process变量中
}
}
inclose();
outclose();
boolean upNewStatus = ftpClientcompletePendingCommand();
if(upNewStatus){
result = DownloadStatusDownload_New_Success;
}else {
result = DownloadStatusDownload_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/fileext 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
ftpCliententerLocalPassiveMode();
//设置以二进制流的方式传输
ftpClientsetFileType(FTPBINARY_FILE_TYPE);
ftpClientsetControlEncoding("GBK");
UploadStatus result;
//对远程目录的处理
String remoteFileName = remote;
if(remotecontains("/")){
remoteFileName = remotesubstring(remotelastIndexOf("/")+1);
//创建服务器远程目录结构，创建失败直接返回
if(CreateDirecroty(remote, ftpClient)==UploadStatusCreate_Directory_Fail){
return UploadStatusCreate_Directory_Fail;
}
}
//检查远程是否存在文件
FTPFile[] files = ftpClientlistFiles(new String(remoteFileNamegetBytes("GBK"),"iso-8859-1"));
if(fileslength == 1){
long remoteSize = files[0]getSize();
File f = new File(local);
long localSize = flength();
if(remoteSize==localSize){
return UploadStatusFile_Exits;
}else if(remoteSize > localSize){
return UploadStatusRemote_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 == UploadStatusUpload_From_Break_Failed){
if(!ftpClientdeleteFile(remoteFileName)){
return UploadStatusDelete_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(ftpClientisConnected()){
ftpClientdisconnect();
}
}
/
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 = UploadStatusCreate_Directory_Success;
String directory = remotesubstring(0,remotelastIndexOf("/")+1);
if(!directoryequalsIgnoreCase("/")&&!ftpClientchangeWorkingDirectory(new String(directorygetBytes("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(directorystartsWith("/")){
start = 1;
}else{
start = 0;
}
end = directoryindexOf("/",start);
while(true){
String subDirectory = new String(remotesubstring(start,end)getBytes("GBK"),"iso-8859-1");
if(!ftpClientchangeWorkingDirectory(subDirectory)){
if(ftpClientmakeDirectory(subDirectory)){
ftpClientchangeWorkingDirectory(subDirectory);
}else {
Systemoutprintln("创建目录失败");
return UploadStatusCreate_Directory_Fail;
}
}
start = end + 1;
end = directoryindexOf("/",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 = localFilelength() / 100;
long process = 0;
long localreadbytes = 0L;
RandomAccessFile raf = new RandomAccessFile(localFile,"r");
OutputStream out = ftpClientappendFileStream(new String(remoteFilegetBytes("GBK"),"iso-8859-1"));
//断点续传
if(remoteSize>0){
ftpClientsetRestartOffset(remoteSize);
process = remoteSize /step;
rafseek(remoteSize);
localreadbytes = remoteSize;
}
byte[] bytes = new byte[1024];
int c;
while((c = rafread(bytes))!= -1){
outwrite(bytes,0,c);
localreadbytes+=c;
if(localreadbytes / step != process){
process = localreadbytes / step;
Systemoutprintln("上传进度:" + process);
//TODO 汇报上传状态
}
}
outflush();
rafclose();
outclose();
boolean result =ftpClientcompletePendingCommand();
if(remoteSize > 0){
status = resultUploadStatusUpload_From_Break_Success:UploadStatusUpload_From_Break_Failed;
}else {
status = resultUploadStatusUpload_New_File_Success:UploadStatusUpload_New_File_Failed;
}
return status;
}
public static void main(String[] args) {
ContinueFTP myFtp = new ContinueFTP();
try {
Systemerrprintln(myFtpconnect("10106236", 21, "5", "jieyan"));
// myFtpftpClientmakeDirectory(new String("歌曲"getBytes("GBK"),"iso-8859-1"));
// myFtpftpClientchangeWorkingDirectory(new String("歌曲"getBytes("GBK"),"iso-8859-1"));
// myFtpftpClientmakeDirectory(new String("爱你等于爱自己"getBytes("GBK"),"iso-8859-1"));
// Systemoutprintln(myFtpupload("E:\\ywflv", "/ywflv",5));
// Systemoutprintln(myFtpupload("E:\\爱你等于爱自己mp4","/爱你等于爱自己mp4"));
//Systemoutprintln(myFtpdownload("/爱你等于爱自己mp4", "E:\\爱你等于爱自己mp4"));
myFtpdisconnect();
} catch (IOException e) {
Systemoutprintln("连接FTP出错："+egetMessage());
}
}
}
360安全浏览器内置下载工具是支持断点续传功能的，但是断点续传需要下载工具和下载资源相互支持配合才行。
所以，如果使用360se下载的文件无法断点续传的话，一般都是资源服务器不支持断点续传功能。
部分下载网为了防止盗链是不允许断点续传的。
一在服务器上面安装FTP服务端比如说用SERV-U来搭建服务端然后在自己电脑上安装下flashfxp工具用来登录FTP下载文件到本地电脑即可支持断点续传很方便
二登录服务器在服务器上面登录百度网盘把你所要下载的东西打包上传到百度网盘然后在本地电脑登录网盘下载
三登录服务器在服务器上面登录你的邮箱把所需要下载的东西打包发送到你的另一个邮箱在本地电脑登录你的另一个邮箱把文件下载出来
一般不是邮件附件几 MB，一般都是几十 MB。普通的上传是容易间断，失败的，上传方面一定是个技术难关。
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