用Java写个ftp传输类实现文件的上传和下载，用ikvmc转成dll

1.Java类：

package com.wjy.ftp.transmission;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.StringBufferInputStream;

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

public class FtpTransmission {
    private String serverUrl=null;
    private String userName=null;
    private String password=null;
    private String storePath=null;
    private int port=;

    public FtpTransmission(String serverUrl, String userNameString,
            String password, String storePath, int port) {
        super();
        this.serverUrl = serverUrl;
        this.userName = userNameString;
        this.password = password;
        this.storePath = storePath;
        this.port = port;
    }

    public String getServerUrl() {
        return serverUrl;
    }

    public void setServerUrl(String serverUrl) {
        this.serverUrl = serverUrl;
    }

    public String getUserNameString() {
        return userName;
    }

    public void setUserNameString(String userNameString) {
        this.userName = userNameString;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getStorePath() {
        return storePath;
    }

    public void setStorePath(String storePath) {
        this.storePath = storePath;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    /**
     * Description:实现ftp的文件上传
     * @author 王吉元
     * @Version 1.0 Dec 16,2013
     * @param fileName:上传的文件名称
     * @param fileContent:文件的内容
     * @return  成功返回ture,失败返回false
     */
    public boolean fileUpLoad(String fileName,String contents){
        boolean isSuccessed=false;
        FTPClient ftpClient=new FTPClient();
        StringBufferInputStream input=new StringBufferInputStream(contents);
        try {
            int reply=;
            ftpClient.connect(serverUrl,port);
            ftpClient.login(userName, password);
            reply=ftpClient.getReplyCode();
            if(!FTPReply.isPositiveCompletion(reply)){
                ftpClient.disconnect();
                return isSuccessed;
            }
            ftpClient.changeWorkingDirectory(storePath);
            ftpClient.storeFile(fileName, input);

            input.close();
            ftpClient.logout();
            isSuccessed=true;
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }finally{
            if(ftpClient.isConnected()){
                try {
                    ftpClient.disconnect();
                } catch (Exception e2) {
                    // TODO: handle exception
                    e2.printStackTrace();
                }
            }
        }
        return isSuccessed;
    }
    /**
     * Description:实现ftp的文件下载
     * @author 王吉元
     * @Version 1.0 Dec 16,2013
     * @param fileName:下载的文件名称
     * @param localPath:下载后保存在本地的路径
     * @return  成功返回ture,失败返回false
     */
    public boolean fileDownload(String fileName,String localPath){
        boolean isSuccessed=false;
        FTPClient ftpClient=new FTPClient();
        try {
            int reply=;
            ftpClient.connect(serverUrl,port);
            ftpClient.login(userName, password);
            reply=ftpClient.getReplyCode();
            if(!FTPReply.isPositiveCompletion(reply)){
                ftpClient.disconnect();
                return isSuccessed;
            }
            ftpClient.changeWorkingDirectory(storePath);

            FTPFile[] files=ftpClient.listFiles();
            for(FTPFile file : files){
                if(file.getName().equals(fileName)){
                    File localFile=new File(localPath+"/"+file.getName());
                    OutputStream outputStream=new FileOutputStream(localFile);

                    ftpClient.retrieveFile(file.getName(), outputStream);
                    outputStream.close();
                }
            }

            ftpClient.logout();
            isSuccessed=true;
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }finally{
            if(ftpClient.isConnected()){
                try {
                    ftpClient.disconnect();
                } catch (Exception e2) {
                    // TODO: handle exception
                    e2.printStackTrace();
                }
            }
        }
        return isSuccessed;
    }
}

2.Java的jar测试：(被注释掉的部分是上传测试代码)

package com.wjy.main;

import java.io.File;
import java.io.FileInputStream;

import com.wjy.ftp.transmission.FtpTransmission;

public class TestMain {
//    public static void main(String args[]){
//        FtpTransmission ftpTransmission=new FtpTransmission("10.13.30.22", "wjy", "wjywjy", "./tools/", 21);
//        try {
//            StringBuilder stringBuilder=new StringBuilder();
//            FileInputStream fileInputStream=new FileInputStream(new File("E://testmodel.cld"));
//            int cc;
//            while((cc=fileInputStream.read())!=-1){
//                stringBuilder.append((char)cc);
//            }
//            System.out.println(stringBuilder);
//            boolean flag=ftpTransmission.fileUpLoad("testmodel.cld", stringBuilder.toString());
//            System.out.println(flag);
//        } catch (Exception e) {
//            // TODO: handle exception
//            e.printStackTrace();
//        }
//    }

    public static void main(String args[]){
    FtpTransmission ftpTransmission=new FtpTransmission("10.13.30.22", "wjy", "wjywjy", "./tools/", );
    try {
        boolean flag=ftpTransmission.fileDownload("ctest.txt","F://NB");
        System.out.println(flag);
    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }
}
}

3.C#的dll(由ikvmc转成)测试：(被注释掉的部分是上传测试代码)

using System;
using System.IO;
using System.Collections.Generic;
using System.Text;
using com.wjy.ftp.transmission;
namespace FTPTransJarTest
{
    class Program
    {
        //static void Main(string[] args)
        //{

        //FtpTransmission ftpTransmission=new FtpTransmission("10.13.30.22", "wjy", "wjywjy", "./tools/", 21);
        //try {
        //    StringBuilder stringBuilder=new StringBuilder();
        //    StreamReader file = new StreamReader("E://testmodel.cld");
        //    int cc;
        //    while((cc=file.Read())!=-1){
        //        stringBuilder.Append((char)cc);
        //    }
        //    Boolean flag = ftpTransmission.fileUpLoad("ctest.cld",stringBuilder.ToString());
        //    Console.Write(flag);
        //} catch (Exception e) {
        //    // TODO: handle exception
        //    Console.Write(e.Message);
        //}

        //}

        static void Main(string[] args)
        {

            FtpTransmission ftpTransmission = new FtpTransmission("10.13.30.22", "wjy", "wjywjy", "./tools/", );
            try
            {
                Boolean flag = ftpTransmission.fileDownload("ctest.txt", "F://NB");
                Console.Write(flag);
            }
            catch (Exception e)
            {
                // TODO: handle exception
                Console.Write(e.Message);
            }

        }
    }
}