上传文件的jar包 + 简单的可执行 jar 文件包制作

最近公司ftp 上传有点问题，老是会出错，为了保证上传的准确性（有时候发布版本需要先上传ftp），特意做了一个上传的jar demo。

基本逻辑：  上传文件  并记录文件名， 之后下载刚才上传的文件， 对比上传和下载的MD5值， 之后删除本地下载的临时文件。

import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPFile;import org.apache.commons.net.ftp.FTPReply;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.math.BigInteger;import java.security.MessageDigest;public class MyClass {    private  String Host = "xxx";    private  int Port = 18021;    private  String username = "xxx";    private  String password = "xxxx";    private  String rootDir = "xxx/";    private FTPClient ftp;    public static String dirSrc = "";    public static String dirSrcParent = "";    public static String downloadPatch = "/download";    public static String dirDes = "";    private static String fileNames[];    private boolean connect(){        int reply;        ftp = new FTPClient();        try {            ftp.connect(Host, Port);            ftp.login(username, password);            ftp.setFileType(FTPClient.BINARY_FILE_TYPE);            reply = ftp.getReplyCode();            if(!FTPReply.isPositiveCompletion(reply)){                ftp.disconnect();                return false;            }else{                ftp.changeWorkingDirectory(rootDir);                return true;            }        } catch (IOException e) {            e.printStackTrace();        }        return false;    }    private void closeFtp(){        if(ftp != null && ftp.isConnected()){            try {                ftp.logout();                ftp.disconnect();            } catch (IOException e) {                e.printStackTrace();            }        }    }    private void upload() throws IOException {        File file =  new File(dirSrc);        if(file.isDirectory()) {            if(dirDes != null && dirDes != ""){//要上传到某个子文件夹                ftp.makeDirectory(dirDes);                ftp.changeWorkingDirectory(dirDes);            } else {                System.out.println("传到app 目录下了");            }            fileNames = file.list();            for(int i = 0; i < fileNames.length; i++){                File file1 = new File(file.getPath() + "\\" + fileNames[i]);                if(file1.isDirectory()){                    System.out.println("不能包含子目录！");                    return;                } else{                    FileInputStream input = new FileInputStream(file1);                    ftp.storeFile(file1.getName(), input);                    input.close();                }            }        } else {            System.out.println("你传错路径了！");        }    }    private void download() throws IOException {        ftp.changeWorkingDirectory(dirDes);        if(fileNames != null && fileNames.length == 0){            for(int i = 0; i < fileNames.length; i++){                FTPFile file = ftp.mlistFile(fileNames[i]);                if(file != null && file.isFile()){                    FileOutputStream outputStream = new FileOutputStream(dirSrc + downloadPatch + file.getName());                    ftp.retrieveFile(file.getName(), outputStream);                    outputStream.flush();                    outputStream.close();                }                System.out.println(fileNames[i] + "没有下载成功！");            }        } else {            System.out.println("没有要下载的文件！");        }    }    public static String getFileMD5(File file) {        if (!file.isFile()) {            return null;        }        MessageDigest digest = null;        FileInputStream in = null;        byte buffer[] = new byte[8192];        int len;        try {            digest = MessageDigest.getInstance("MD5");            in = new FileInputStream(file);            while ((len = in.read(buffer)) != -1) {                digest.update(buffer, 0, len);            }            BigInteger bigInt = new BigInteger(1, digest.digest());            return bigInt.toString(16);        } catch (Exception e) {            e.printStackTrace();            return null;        } finally {            try {                in.close();            } catch (Exception e) {                e.printStackTrace();            }        }    }    private static boolean deleteDir(File dir) {        if (dir.isDirectory()) {            String[] children = dir.list();            for (int i=0; i<children.length; i++) {                boolean success = deleteDir(new File(dir, children[i]));                if (!success) {                    return false;                }            }        }        // 目录此时为空，可以删除        return dir.delete();    }    public static void main(String[] args){        if(args.length >=1 && args[0] != null && args[0] != "") {//读取第一级目录            dirSrc = args[0];            if(args.length >=2 && args[1] != null && args[1] != "") {                dirDes =  args[1];            }        }        if(dirSrc == null || dirSrc == ""){            System.out.println("请传入要上传文件的绝对路径  请传入目标文件的相对路径（如果为空就直接放在app/下面了）");            return;        }        MyClass myClass = new MyClass();        if(myClass.connect()){            try {                myClass.upload();                System.out.println("上传完毕！！！！！");            } catch (IOException e) {                e.printStackTrace();                System.out.println("上传失败！");            }        } else {            System.out.println("连接不上服务器啊！");        }        myClass.closeFtp();        if(myClass.connect()){            try {                myClass.download();                System.out.println("下载完毕！！！！！");            } catch (IOException e) {                e.printStackTrace();                System.out.println("下载失败！");            }        }  else {            System.out.println("连接不上服务器啊！");        }        //对比两个文件的MD5        File sourceFile;        File downloadFile;        for(int i = 0; i < fileNames.length; i++){            sourceFile = new File(dirSrc + fileNames[i]);            downloadFile = new File(dirSrc + downloadPatch + fileNames[i]);            if(sourceFile == null || downloadFile == null){                System.out.println("文件损坏了！");                return;            }            if(getFileMD5(sourceFile) == getFileMD5(downloadFile)){                System.out.println(fileNames[i] + "上传成功了！");            } else {                System.out.println(fileNames[i] + "上传有问题！");                return;            }        }        System.out.println(fileNames.length + "上传成功了");        File downloadFiles = new File(dirSrc + downloadPatch);        deleteDir(downloadFiles);        System.out.println( "临时目录已经删除！");    }}

接下来打包成可执行jar

1 将源码文件放到一个目录下，将依赖的commons-net-3.4.jar 包放到相同目录下

2 用cmd 进入该目录后  执行 javac -encoding UTF-8 -classpath commons-net-3.4.jar MyClass.java

3 执行 jar -cvf ftp.jar MyClass.class  ，打包成一个ftp.jar

4. 解压缩 ftp.jar 并且修改里面的MANIFEST.MF 文件：

Manifest-Version: 1.0
Main-Class: MyClass
Class-Path: commons-net-3.4.jar
Created-By: 1.8.0_74 (Oracle Corporation)

5 将刚修改好的文件 拷贝到与源码同一个目录，在cmd里面执行 jar cvfm abc.jar MANIFEST.MF MyClass.class

ok  打包成功了。

6.  使用java -jar abc.jar  执行jar文件