java ftp上传文件 支持并发

package com.dl.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.util.Map;

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;

public class FTPUtils {
	
        //ftp服务器地址
//		private static String hostname = ReadRootPathUtils.getItemsPath();
        //ftp服务器端口号默认为21
//		private static Integer port = 21 ;
        //ftp登录账号
//		private static String username = "root";
        //ftp登录密码
//		private static String password = "123";
        
//		private static FTPClient ftpClient = null;
        
        /**
         * 初始化ftp服务器
         */
        public static FTPClient initFtpClient() {
        	FTPClient ftpClient = null;
        	Map<String, String> ftp = ReadRootPathUtils.getFTP();
            ftpClient = new FTPClient();
            ftpClient.setControlEncoding("utf-8");
            try {
                System.out.println("connecting...ftp服务器:"+ftp.get("ftpIp")+":"+ftp.get("port")); 
                ftpClient.connect(ftp.get("ftpIp"), Integer.parseInt(ftp.get("port"))); //连接ftp服务器
                
                ftpClient.login(ftp.get("userName"),ftp.get("pwd") ); //登录ftp服务器
                
                int replyCode = ftpClient.getReplyCode(); //是否成功登录服务器
                if(!FTPReply.isPositiveCompletion(replyCode)){
                    System.out.println("connect failed...ftp服务器:"+ftp.get("ftpIp")+":"+ftp.get("port")); 
                }
                System.out.println("connect successfu...ftp服务器:"+ftp.get("ftpIp")+":"+ftp.get("port")); 
            }catch (MalformedURLException e) { 
               e.printStackTrace(); 
            }catch (IOException e) { 
               e.printStackTrace(); 
            }
			return ftpClient; 
        }
        
        

        /**
        * 上传文件
        * @param pathname ftp服务保存地址
        * @param fileName 上传到ftp的文件名
        *  @param originfilename 待上传文件的名称（绝对地址） * 
        * @return
        */
        public static boolean uploadFile( String pathname, String fileName,String originfilename){
        	boolean flag = false;
            InputStream inputStream = null;
            FTPClient initFtpClient = initFtpClient();
            try{
                System.out.println("开始上传文件");
                //把文件转化为流
                inputStream = new FileInputStream(new File(originfilename));
                //初始化ftp
                initFtpClient();
                //设置编码
                initFtpClient.setFileType(initFtpClient.BINARY_FILE_TYPE);
                //文件需要保存的路径
                CreateDirecroty(pathname,initFtpClient);
                //
                initFtpClient.makeDirectory(pathname);
                //
                initFtpClient.changeWorkingDirectory(pathname);
                //
                initFtpClient.storeFile(fileName, inputStream);
                
                inputStream.close();
                initFtpClient.logout();
                flag = true;
                System.out.println("上传文件成功");
            }catch (Exception e) {
                System.out.println("上传文件失败");
                e.printStackTrace();
            }finally{
                if(initFtpClient.isConnected()){ 
                    try{
                    	initFtpClient.disconnect();
                    }catch(IOException e){
                        e.printStackTrace();
                    }
                } 
                if(null != inputStream){
                    try {
                        inputStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    } 
                } 
            }
            return true;
        }
        /**
         * 上传文件
         * @param pathname ftp服务保存地址
         * @param fileName 上传到ftp的文件名
         * @param inputStream 输入文件流 
         * @return
         */
        public static boolean uploadFile( String pathname, String fileName,InputStream inputStream){
        	FTPClient initFtpClient = initFtpClient();
        	boolean flag = false;
            try{
                System.out.println("开始上传文件");
                initFtpClient();
                initFtpClient.setFileType(initFtpClient.BINARY_FILE_TYPE);
                CreateDirecroty(pathname,initFtpClient);
                initFtpClient.makeDirectory(pathname);
                initFtpClient.changeWorkingDirectory(pathname);
                initFtpClient.storeFile(fileName, inputStream);
                inputStream.close();
                initFtpClient.logout();
                flag = true;
                System.out.println("上传文件成功");
            }catch (Exception e) {
                System.out.println("上传文件失败");
                e.printStackTrace();
            }finally{
                if(initFtpClient.isConnected()){ 
                    try{
                    	initFtpClient.disconnect();
                    }catch(IOException e){
                        e.printStackTrace();
                    }
                } 
                if(null != inputStream){
                    try {
                        inputStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    } 
                } 
            }
            return true;
        }
        //改变目录路径
         public static boolean changeWorkingDirectory(String directory ,FTPClient initFtpClient) {
        	 boolean flag = true;
                try {
                    flag = initFtpClient.changeWorkingDirectory(directory);
                    if (flag) {
                      System.out.println("进入文件夹" + directory + " 成功！");

                    } else {
                        System.out.println("进入文件夹" + directory + " 失败！开始创建文件夹");
                    }
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
                return flag;
            }

        //创建多层目录文件，如果有ftp服务器已存在该文件，则不创建，如果无，则创建
        public static boolean CreateDirecroty(String remote,FTPClient initFtpClient) throws IOException {
            boolean success = true;
            String directory = remote + "/";
            // 如果远程目录不存在，则递归创建远程服务器目录
            if (!directory.equalsIgnoreCase("/") && !changeWorkingDirectory(new String(directory),initFtpClient)) {
                int start = 0;
                int end = 0;
                if (directory.startsWith("/")) {
                    start = 1;
                } else {
                    start = 0;
                }
                end = directory.indexOf("/", start);
                String path = "";
                String paths = "";
                while (true) {
                    String subDirectory = new String(remote.substring(start, end).getBytes("GBK"), "iso-8859-1");
                    path = path + "/" + subDirectory;
                    if (!existFile(path,initFtpClient)) {
                        if (makeDirectory(subDirectory,initFtpClient)) {
                            changeWorkingDirectory(subDirectory,initFtpClient);
                        } else {
                            System.out.println("创建目录[" + subDirectory + "]失败");
                            changeWorkingDirectory(subDirectory,initFtpClient);
                        }
                    } else {
                        changeWorkingDirectory(subDirectory,initFtpClient);
                    }

                    paths = paths + "/" + subDirectory;
                    start = end + 1;
                    end = directory.indexOf("/", start);
                    // 检查所有目录是否创建完毕
                    if (end <= start) {
                        break;
                    }
                }
            }
            return success;
        }

      //判断ftp服务器文件是否存在    
        public static boolean existFile(String path,FTPClient initFtpClient) throws IOException {
                
        	boolean flag = false;
                FTPFile[] ftpFileArr = initFtpClient.listFiles(path);
                if (ftpFileArr.length > 0) {
                    flag = true;
                }
                return flag;
            }
        //创建目录
        public static boolean makeDirectory(String dir,FTPClient initFtpClient) {
            boolean flag = true;
            try {
                flag = initFtpClient.makeDirectory(dir);
                if (flag) {
                    System.out.println("创建文件夹" + dir + " 成功！");

                } else {
                    System.out.println("创建文件夹" + dir + " 失败！");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return flag;
        }
        
        /** * 下载文件 * 
        * @param pathname FTP服务器文件目录 * 
        * @param filename 文件名称 * 
        * @param localpath 下载后的文件路径 * 
        * @return */
        public static boolean downloadFile(String pathname, String filename, String localpath){ 
            boolean flag = false; 
            FTPClient initFtpClient = initFtpClient();
            OutputStream os=null;
            try { 
                System.out.println("开始下载文件");
                initFtpClient();
                //切换FTP目录 
                initFtpClient.changeWorkingDirectory(pathname); 
                FTPFile[] ftpFiles = initFtpClient.listFiles(); 
                for(FTPFile file : ftpFiles){ 
                    if(filename.equalsIgnoreCase(file.getName())){ 
                        File localFile = new File(localpath + "/" + file.getName()); 
                        os = new FileOutputStream(localFile); 
                        initFtpClient.retrieveFile(file.getName(), os); 
                        os.close(); 
                    } 
                } 
                initFtpClient.logout(); 
                flag = true; 
                System.out.println("下载文件成功");
            } catch (Exception e) { 
                System.out.println("下载文件失败");
                e.printStackTrace(); 
            } finally{ 
                if(initFtpClient.isConnected()){ 
                    try{
                    	initFtpClient.disconnect();
                    }catch(IOException e){
                        e.printStackTrace();
                    }
                } 
                if(null != os){
                    try {
                        os.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    } 
                } 
            } 
            return flag; 
        }
        //读取文件
        public static boolean readFile(String pathname, String filename, String localpath){
        	FTPClient initFtpClient = initFtpClient();
        	  boolean flag = false; 
              OutputStream os=null;
              try { 
                  System.out.println("开始下载文件");
                  initFtpClient();
                  //切换FTP目录 
                  initFtpClient.changeWorkingDirectory(pathname); 
                  FTPFile[] ftpFiles = initFtpClient.listFiles(); 
                  
                  for(FTPFile file : ftpFiles){ 
                      if(filename.equalsIgnoreCase(file.getName())){ 
                    	  
                        File localFile = new File("/usr/dlconfig/temp/" + file.getName()); 
                        os = new FileOutputStream(localFile); 
                        initFtpClient.retrieveFile(file.getName(), os); 
                        os.close(); 
                      } 
                  } 
                  initFtpClient.logout(); 
                  flag = true; 
                  System.out.println("下载文件成功");
              } catch (Exception e) { 
                  System.out.println("下载文件失败");
                  e.printStackTrace(); 
              } finally{ 
                  if(initFtpClient.isConnected()){ 
                      try{
                    	  initFtpClient.disconnect();
                      }catch(IOException e){
                          e.printStackTrace();
                      }
                  } 
                  if(null != os){
                      try {
                          os.close();
                      } catch (IOException e) {
                          e.printStackTrace();
                      } 
                  } 
              } 
              return flag; 
        }
        
        /** * 删除文件 * 
        * @param pathname FTP服务器保存目录 * 
        * @param filename 要删除的文件名称 * 
        * @return */ 
        public static boolean deleteFile(String pathname, String filename){ 
            boolean flag = false; 
            FTPClient initFtpClient = initFtpClient();
            try { 
                System.out.println("开始删除文件");
                initFtpClient();
                //切换FTP目录 
                initFtpClient.changeWorkingDirectory(pathname); 
                initFtpClient.dele(filename); 
                initFtpClient.logout();
                flag = true; 
                System.out.println("删除文件成功");
            } catch (Exception e) { 
                System.out.println("删除文件失败");
                e.printStackTrace(); 
            } finally {
                if(initFtpClient.isConnected()){ 
                    try{
                    	initFtpClient.disconnect();
                    }catch(IOException e){
                        e.printStackTrace();
                    }
                } 
            }
            return flag; 
        }
        
//        public static void main(String[] args) {
////            FtpUtils ftp =new FtpUtils(); 
//            //ftp.uploadFile("ftpFile/data", "123.docx", "E://123.docx");
//            //ftp.downloadFile("ftpFile/data", "123.docx", "F://");
////            ftp.deleteFile("ftpFile/data", "123.docx");
////            System.out.println("ok");
//        	FTPUtils f = new FTPUtils();
//        	f.initFtpClient();
//        	
//        	
//        }
}