简易版的解压缩

下载winRar工具 

package com.example.demo.util;

import java.util.*;
import java.lang.Runtime.*;
import java.io.*;

public class UnRarTest {
	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in);
		System.out.println("输入你要解压的文件(包括路径,后缀)");
		String filename = in.nextLine();
		showList(filename);
		System.out.println("从中选择你要打开的文件");
		String nfilename = in.nextLine();
		unRar(nfilename);
	}

	/* D://Program Files//WinRAR//为我的WinRAR目录* 根据自己的情况改下* 得到RAR文件目录 */
	public static void showList(String compress) throws Exception {
		Runtime rt = Runtime.getRuntime();
		Process p = rt.exec("C://Program Files (x86)//WinRAR//UnRAR.EXE l " + compress);
		InputStream fis = p.getInputStream();
		// 获得子进程的输入流
		BufferedReader in = new BufferedReader(new InputStreamReader((fis), "GBK"));
		String line;
		while ((line = in.readLine()) != null) {
			System.out.println(line);
		}
		in.close();
		fis.close();
	} /* * 显示你要打开的文件内容 */

	public static void unRar(String ncompress) throws Exception {
		Runtime rt = Runtime.getRuntime();
		Process p = rt.exec("C://Program Files (x86)//WinRAR//UnRAR.EXE e -o+ -p- " + ncompress);
		// 将指定的压缩文件解压到D:/Program Files/WinRAR/目录下
		BufferedReader in = new BufferedReader(new FileReader("C://Program Files (x86)//WinRAR//" + ncompress));
		String line;
		while ((line = in.readLine()) != null) {
			System.out.println(line);
		}
		in.close();
	}
}