java解压RAR文件

package com.dollar.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;

public class UnRarFile {
/** 
     * 解压rar文件 
     *  
     * @param targetPath 
     * @param absolutePath 
     */ 
    public void unRarFile(String targetPath, String absolutePath) {  
 
        try {  
 
            // 系统安装winrar的路径  
            String cmd = "C:\\Program Files\\WinRAR\\WinRAR.exe";  
            String unrarCmd = cmd + " x -r -p- -o+ " + absolutePath + " " 
                    + targetPath;  
 
            Runtime rt = Runtime.getRuntime();  
            Process pre = rt.exec(unrarCmd);  
            InputStreamReader isr = new InputStreamReader(pre.getInputStream());  
            BufferedReader bf = new BufferedReader(isr);  
            String line = null;  
            while ((line = bf.readLine()) != null) {  
                line = line.trim();  
                if ("".equals(line)) {  
                    continue;  
                }  
                System.out.println(line);  
            }  
 
            bf.close();  
        } catch (Exception e) {  
            System.out.println("解压发生异常");  
        }  
    }  
 
    /** 
     * @param args 
     */ 
    public static void main(String[] args) {  
        String targetPath = "E:\\file\\test\\";  
        UnRarFile unrar = new UnRarFile();  
       
        File file=new File("E:\\file\\ybf100");
        File[] fs=file.listFiles();
        for(File f:fs){
        FileUtil.saveMsg("E:\\file\\recode.txt", f.getName(), "UTF-8", true);
        unrar.unRarFile(targetPath, f.getPath());  
        }
    }  
 

}