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<dependency>

<groupId>commons-cli</groupId>

<artifactId>commons-cli</artifactId>

<version>1.3.1</version>

</dependency>

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import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.HashSet;​

import org.apache.commons.cli.CommandLine;

import org.apache.commons.cli.CommandLineParser;

import org.apache.commons.cli.DefaultParser;

import org.apache.commons.cli.HelpFormatter;

import org.apache.commons.cli.Option;

import org.apache.commons.cli.Options;

import org.apache.commons.cli.ParseException;​

import com.lwt.util.DirUtil;​

public class CommandLineUtil {

private String[] args;

private Options opts = new Options();

private File keyFile;

private boolean encrypt;

private boolean create;

private boolean enName;

private File[] files;

private File[] dirs;

public File getKeyFile() {

return keyFile;

}

public boolean isEncrypt() {

return encrypt;

}

public boolean isEnName() {

return enName;

}

public boolean isCreate() {

return create;

}

public File[] getFiles() {

return files;

}

public File[] getDirs() {

return dirs;

}

​

public CommandLineUtil(String[] args) {

this.args = args;

definedOptions();

parseOptions();

duplicate_removal();

}

// 定义命令行参数

private void definedOptions(){

Option opt_h = new Option("h", "Show this page.");

Option opt_e = new Option("e", "encrypt", false, "Encrypt file.");

Option opt_d = new Option("d", "decrypt", false, "Decrypt file.");

Option opt_c = new Option("c", "create", false, "Create new key file.");

Option opt_n = new Option("n", "name", false, "Encrypt file name.");

Option opt_k = Option.builder("k").hasArg().argName("keyFile")

.desc("Specify the key file").build();

Option opt_f = Option.builder("f").hasArgs().argName("file1,file2...")

.valueSeparator(',')

.desc("A files list with ',' separate to handle").build();

Option opt_r = Option

.builder("r")

.hasArgs()

.argName("dir1,dir1...")

.valueSeparator(',')

.desc("A directories list with ',' separate to handle its child files")

.build();

Option opt_R = Option

.builder("R")

.hasArgs()

.argName("dir1,dir1...")

.valueSeparator(',')

.desc("A directories list with ',' separate to recurse handle child files")

.build();

opts.addOption(opt_n);

opts.addOption(opt_c);

opts.addOption(opt_k);

opts.addOption(opt_h);

opts.addOption(opt_e);

opts.addOption(opt_d);

opts.addOption(opt_f);

opts.addOption(opt_r);

opts.addOption(opt_R);

}

// 解析处理命令行参数

private void parseOptions(){

CommandLineParser parser = new DefaultParser();

CommandLine line = null;

// 解析命令行参数

try {

line = parser.parse(opts, args);

} catch (ParseException e) {

System.err.println(e.getMessage());

System.exit(1);

}

​

// 若指定h则显示帮助

if (args == null || args.length == 0 || line.hasOption("h")) {

HelpFormatter help = new HelpFormatter();

help.printHelp("encrypt", opts);

}

​

// 选择加密或解密操作，默认是加密文件

if (line.hasOption("d")) {

if (line.hasOption("e")) {

System.err

.println("The -e and -d option can't specify at the same time.");

System.exit(1);

}

encrypt = false;

} else {

encrypt = true;

if(line.hasOption("n")){

enName = true;

}

}

if (line.hasOption("k")) {

String k = line.getOptionValue("k");

File file = new File(k);

if (line.hasOption("c")) {

keyFile = file;

create = true;

}else {

if(file.isFile()){

keyFile = file;

} else{

System.err.println(file + " is not a available key file");

System.exit(1);

}

}

}

​

ArrayList<File> files = new ArrayList<File>();

ArrayList<File> dirs = new ArrayList<File>();

if (line.hasOption("f")) {

String[] fs = line.getOptionValues("f");

for(String f : fs){

File file = new File(f);

if(file.isFile()){

files.add(file);

}else{

System.err.println(file + " is not a file");

System.exit(1);

}

}

}

​

if (line.hasOption("r")) {

String[] rs = line.getOptionValues("r");

for(String r : rs){

File dir = new File(r);

if(dir.isDirectory()){

dirs.add(dir);

DirUtil dirUtil = new DirUtil(dir);

files.addAll(Arrays.asList(dirUtil.getFiles()));

dirs.addAll(Arrays.asList(dirUtil.getDirs()));

}else{

System.err.println(dir + " is not a directory");

System.exit(1);

}

}

}

​

if (line.hasOption("R")) {

String[] Rs = line.getOptionValues("R");

for(String R : Rs){

File dir = new File(R);

if(dir.isDirectory()){

dirs.add(dir);

DirUtil dirUtil = new DirUtil(dir);

files.addAll(Arrays.asList(dirUtil.getAllFiles()));

dirs.addAll(Arrays.asList(dirUtil.getAllDirs()));

}else{

System.err.println(dir + " is not a directory");

System.exit(1);

}

}

}

this.files = files.toArray(new File[0]);

this.dirs = dirs.toArray(new File[0]);

}

public void duplicate_removal (){

HashSet<File> fileSet = new HashSet<File>();

for(File file : files){

try {

fileSet.add(file.getCanonicalFile());

} catch (IOException e) {

System.err.println(e.getMessage());

System.exit(1);

}

}

files = fileSet.toArray(new File[0]);

fileSet = new HashSet<File>();

for(File dir : dirs){

try {

fileSet.add(dir.getCanonicalFile());

} catch (IOException e) {

System.err.println(e.getMessage());

System.exit(1);

}

}

dirs = fileSet.toArray(new File[0]);

}

}