Android关于FTP文件上传和下载功能详解
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2023-12-16 08:58:58
本文实例为大家分享了android九宫格图片展示的具体代码,供大家参考,具体内容如下
此篇博客为整理文章,供大家学习。
1.首先下载commons-net ...
本文实例为大家分享了android九宫格图片展示的具体代码,供大家参考,具体内容如下
此篇博客为整理文章,供大家学习。
1.首先下载commons-net jar包,可以百度下载。
ftp的文件上传和下载的工具类:
package ryancheng.example.progressbar; import java.io.file; import java.io.fileoutputstream; import java.io.inputstream; import java.io.outputstream; import java.io.randomaccessfile; import org.apache.commons.net.ftp.ftp; import org.apache.commons.net.ftp.ftpclient; import org.apache.commons.net.ftp.ftpfile; import org.apache.commons.net.ftp.ftpreply; import android.os.environment; public class ftpmanager { ftpclient ftpclient = null; public ftpmanager() { ftpclient = new ftpclient(); } // 连接到ftp服务器 public synchronized boolean connect() throws exception { boolean bool = false; if (ftpclient.isconnected()) {//判断是否已登陆 ftpclient.disconnect(); } ftpclient.setdatatimeout(20000);//设置连接超时时间 ftpclient.setcontrolencoding("utf-8"); ftpclient.connect("ip地址", 端口); if (ftpreply.ispositivecompletion(ftpclient.getreplycode())) { if (ftpclient.login("用户名", "密码")) { bool = true; system.out.println("ftp连接成功"); } } return bool; } // 创建文件夹 public boolean createdirectory(string path) throws exception { boolean bool = false; string directory = path.substring(0, path.lastindexof("/") + 1); int start = 0; int end = 0; if (directory.startswith("/")) { start = 1; } end = directory.indexof("/", start); while (true) { string subdirectory = directory.substring(start, end); if (!ftpclient.changeworkingdirectory(subdirectory)) { ftpclient.makedirectory(subdirectory); ftpclient.changeworkingdirectory(subdirectory); bool = true; } start = end + 1; end = directory.indexof("/", start); if (end == -1) { break; } } return bool; } // 实现上传文件的功能 public synchronized boolean uploadfile(string localpath, string serverpath) throws exception { // 上传文件之前,先判断本地文件是否存在 file localfile = new file(localpath); if (!localfile.exists()) { system.out.println("本地文件不存在"); return false; } system.out.println("本地文件存在,名称为:" + localfile.getname()); createdirectory(serverpath); // 如果文件夹不存在,创建文件夹 system.out.println("服务器文件存放路径:" + serverpath + localfile.getname()); string filename = localfile.getname(); // 如果本地文件存在,服务器文件也在,上传文件,这个方法中也包括了断点上传 long localsize = localfile.length(); // 本地文件的长度 ftpfile[] files = ftpclient.listfiles(filename); long serversize = 0; if (files.length == 0) { system.out.println("服务器文件不存在"); serversize = 0; } else { serversize = files[0].getsize(); // 服务器文件的长度 } if (localsize <= serversize) { if (ftpclient.deletefile(filename)) { system.out.println("服务器文件存在,删除文件,开始重新上传"); serversize = 0; } } randomaccessfile raf = new randomaccessfile(localfile, "r"); // 进度 long step = localsize / 100; long process = 0; long currentsize = 0; // 好了,正式开始上传文件 ftpclient.enterlocalpassivemode(); ftpclient.setfiletype(ftp.binary_file_type); ftpclient.setrestartoffset(serversize); raf.seek(serversize); outputstream output = ftpclient.appendfilestream(filename); byte[] b = new byte[1024]; int length = 0; while ((length = raf.read(b)) != -1) { output.write(b, 0, length); currentsize = currentsize + length; if (currentsize / step != process) { process = currentsize / step; if (process % 10 == 0) { system.out.println("上传进度:" + process); } } } output.flush(); output.close(); raf.close(); if (ftpclient.completependingcommand()) { system.out.println("文件上传成功"); return true; } else { system.out.println("文件上传失败"); return false; } } // 实现下载文件功能,可实现断点下载 public synchronized boolean downloadfile(string localpath, string serverpath) throws exception { // 先判断服务器文件是否存在 ftpfile[] files = ftpclient.listfiles(serverpath); if (files.length == 0) { system.out.println("服务器文件不存在"); return false; } system.out.println("远程文件存在,名字为:" + files[0].getname()); localpath = localpath + files[0].getname(); // 接着判断下载的文件是否能断点下载 long serversize = files[0].getsize(); // 获取远程文件的长度 file localfile = new file(localpath); long localsize = 0; if (localfile.exists()) { localsize = localfile.length(); // 如果本地文件存在,获取本地文件的长度 if (localsize >= serversize) { system.out.println("文件已经下载完了"); file file = new file(localpath); file.delete(); system.out.println("本地文件存在,删除成功,开始重新下载"); return false; } } // 进度 long step = serversize / 100; long process = 0; long currentsize = 0; // 开始准备下载文件 ftpclient.enterlocalactivemode(); ftpclient.setfiletype(ftp.binary_file_type); outputstream out = new fileoutputstream(localfile, true); ftpclient.setrestartoffset(localsize); inputstream input = ftpclient.retrievefilestream(serverpath); byte[] b = new byte[1024]; int length = 0; while ((length = input.read(b)) != -1) { out.write(b, 0, length); currentsize = currentsize + length; if (currentsize / step != process) { process = currentsize / step; if (process % 10 == 0) { system.out.println("下载进度:" + process); } } } out.flush(); out.close(); input.close(); // 此方法是来确保流处理完毕,如果没有此方法,可能会造成现程序死掉 if (ftpclient.completependingcommand()) { system.out.println("文件下载成功"); return true; } else { system.out.println("文件下载失败"); return false; } } // 如果ftp上传打开,就关闭掉 public void closeftp() throws exception { if (ftpclient.isconnected()) { ftpclient.disconnect(); } } }
具体实现看代码注释写的很详细。
一.android中ftp文件上传代码:
// 上传例子 private void ftpupload() { new thread() { public void run() { try { system.out.println("正在连接ftp服务器...."); ftpmanager ftpmanager = new ftpmanager(); if (ftpmanager.connect()) { if (ftpmanager.uploadfile(ftpmanager.rootpath + "updatexzmarketplatform.apk", "mnt/sdcard/")) { ftpmanager.closeftp(); } } } catch (exception e) { // todo: handle exception // system.out.println(e.getmessage()); } } }.start(); }
二.android中ftp文件下载代码:
// 下载例子 private void ftpdownload() { new thread() { public void run() { try { system.out.println("正在连接ftp服务器...."); ftpmanager ftpmanager = new ftpmanager(); if (ftpmanager.connect()) { if (ftpmanager.downloadfile(ftpmanager.rootpath, "20120723_xfq07_xzmarketplatform.db")) { ftpmanager.closeftp(); } } } catch (exception e) { // todo: handle exception // system.out.println(e.getmessage()); } } }.start(); }
自己之前做项目的时候写过的ftp上传代码:
package com.kandao.yunbell.videocall; import java.io.file; import java.io.fileinputstream; import java.io.filenotfoundexception; import java.io.ioexception; import java.io.unsupportedencodingexception; import java.net.socketexception; import org.apache.commons.net.ftp.ftp; import org.apache.commons.net.ftp.ftpclient; import org.apache.commons.net.ftp.ftpreply; import com.kandao.yunbell.common.sysapplication; import android.content.context; import android.util.log; public class myuploadthread extends thread { private string filename;// 文件名字 private string filepath;// 文件本地路径 private string filestoragepath;// 文件服务器存储路径 private string serveraddress;// 服务器地址 private string ftpusername;// ftp账号 private string ftppassword;// ftp密码 private context mcontext; public myuploadthread() { super(); // todo auto-generated constructor stub } public myuploadthread(context mcontext,string filename, string filepath, string filestoragepath,string serveraddress,string ftpusername,string ftppassword) { super(); this.filename = filename; this.filepath = filepath; this.filestoragepath = filestoragepath; this.serveraddress = serveraddress; this.ftpusername = ftpusername; this.ftppassword = ftppassword; this.mcontext=mcontext; } @override public void run() { super.run(); try { fileinputstream fis=null; ftpclient ftpclient = new ftpclient(); string[] idport = serveraddress.split(":"); ftpclient.connect(idport[0], integer.parseint(idport[1])); int returncode = ftpclient.getreplycode(); log.i("caohai", "returncode,upload:"+returncode); boolean loginresult = ftpclient.login(ftpusername, ftppassword); log.i("caohai", "loginresult:"+loginresult); if (loginresult && ftpreply.ispositivecompletion(returncode)) {// 如果登录成功 // 设置上传目录 if (((sysapplication) mcontext).getisvideo()) { ((sysapplication) mcontext).setisvideo(false); boolean ff=ftpclient.changeworkingdirectory(filestoragepath + "/video/"); log.i("caohai", "ff:"+ff); }else{ boolean ee=ftpclient.changeworkingdirectory(filestoragepath + "/photo/"); log.i("caohai", "ee:"+ee); } ftpclient.setbuffersize(1024); // ftpclient.setcontrolencoding("iso-8859-1"); // ftpclient.enterlocalpassivemode(); ftpclient.setfiletype(ftp.binary_file_type); fis = new fileinputstream(filepath + "/" + filename); log.i("caohai", "filestoragepath00000:"+filestoragepath); string[] path = filestoragepath.split("visitorrecord"); boolean fs = ftpclient.storefile(new string((path[1] + "/photo/" + filename).getbytes(), "iso-8859-1"), fis); log.i("caohai", "shifoushangchuanchenggong:"+fs); fis.close(); ftpclient.logout(); //ftpclient.disconnect(); } else {// 如果登录失败 ftpclient.disconnect(); } } catch (numberformatexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (socketexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (filenotfoundexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (unsupportedencodingexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (ioexception e) { // todo auto-generated catch block e.printstacktrace(); } } }
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。