Android FTP服务器上传文件攻略(代码详解)

1.前言

在开发中，会遇到向ftp服务器上传文件的需求,首先要导入
commons-net-3.3.jar 然后利用api进行相关操作，具体功能如下：

ftp相关代码

import android.util.log;

import org.apache.commons.net.ftp.ftp;
import org.apache.commons.net.ftp.ftpclient;
import org.apache.commons.net.ftp.ftpreply;

import java.io.fileinputstream;

public class ftpclientutils {

 private static final string tag = "mainactivity";
 private ftpclient ftpclient = null; // ftp客户端

 /**
 * 连接到ftp服务器
 *
 * @param host ftp服务器域名
 * @param username 访问用户名
 * @param password 访问密码
 * @param port 端口
 * @return 是否连接成功
 */
 public boolean ftpconnect(string host, string username, string password, int port) {
 try {
  ftpclient = new ftpclient();
  ftpclient.connect(host,port);
  // 根据返回的状态码，判断链接是否建立成功
  if (ftpreply.ispositivecompletion(ftpclient.getreplycode())) {
  boolean status = ftpclient.login(username, password);
  /*
   * 设置文件传输模式
   * 避免一些可能会出现的问题，在这里必须要设定文件的传输格式。
   * 在这里我们使用binary_file_type来传输文本、图像和压缩文件。
   */
  ftpclient.setfiletype(ftp.binary_file_type);
  ftpclient.enterlocalpassivemode();
  return status;
  }
 } catch (exception e) {
  e.printstacktrace();
 }
 return false;
 }

 /**
 * 断开ftp服务器连接
 *
 * @return 断开结果
 */
 public boolean ftpdisconnect() {
 // 判断空指针
 if (ftpclient == null) {
  return true;
 }
 // 断开ftp服务器连接
 try {
  ftpclient.logout();
  ftpclient.disconnect();
  return true;
 } catch (exception e) {
  e.printstacktrace();
 }
 return false;
 }

 /**
 * ftp 文件上传
 *
 * @param srcfilepath 源文件目录
 * @param desfilename 文件名称
 * @return 文件上传结果
 */
 public boolean ftpupload(string srcfilepath, string desfilename) {
 boolean status = false;
 try {
  fileinputstream srcfilestream = new fileinputstream(srcfilepath);
  status = ftpclient.storefile(desfilename, srcfilestream);
  srcfilestream.close();
  return status;
 } catch (exception e) {
  e.printstacktrace();
 }
 return status;
 }

 /**
 * ftp 更改目录
 *
 * @param path 更改的路径
 * @return 更改是否成功
 */
 public boolean ftpchangepath(string path) {
 boolean status = false;
 try {
  status = ftpclient.changeworkingdirectory(path);
 } catch (exception e) {
  e.printstacktrace();
 }
 return status;
 }
}

2.调用api

boolean isconnect = mftpclient.ftpconnect("服务器host", "用户名", "密码", 21);//默认端口号是21
  if (isconnect) {
  boolean issuccessful = mftpclient.ftpupload("/sdcard/" + foldername + "/" + mpicturename, "/htdocs/pics/" + mpicturename);
  if (issuccessful) {
   mftpclient.ftpdisconnect();
  		//上传成功
  } else {
   //上传失败
  }
  } else {
  //服务器连接失败
  }

附录：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(); 
 } 
 
 } 
} 

总结

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