java进阶篇解压缩zip rar文件

package com.cn.teachmobile.utils;

import java.io.File;
import java.io.FileOutputStream;

import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Expand;

import de.innosystec.unrar.Archive;
import de.innosystec.unrar.rarfile.FileHeader;

/**
 * @author gongchaobin
 *
 * 解压缩zip rar文件
 */
public class ZipHelper {

   /**
    * 解压zip文件
    * 
    * @param sourceZip 需要解压的文件路径
    * @param destDir 解压存放的路径
    * @throws Exception
    */
   private static void unzip(String sourceZip,String destDir) throws Exception{   
       try{   
           Project p = new Project();   
           Expand e = new Expand();   
           e.setProject(p);   
           e.setSrc(new File(sourceZip));   
           e.setOverwrite(false);   
           e.setDest(new File(destDir));   
           /*  
           ant下的zip工具默认压缩编码为UTF-8编码，  
              而winRAR软件压缩是用的windows默认的GBK或者GB2312编码  
               所以解压缩时要制定编码格式  
           */  
           e.setEncoding("gbk");   
           e.execute();   
       }catch(Exception e){   
           throw e;   
       }   
   }  
 
   /**
    * 解压rar文件
    * 
    * @param sourceRar
    * @param destDir
    * @throws Exception
    */
   private static void unrar(String sourceRar,String destDir) throws Exception{   
       Archive a = null;   
       FileOutputStream fos = null;   
       try{   
           a = new Archive(new File(sourceRar));   
           FileHeader fh = a.nextFileHeader();   
           while(fh!=null){   
               if(!fh.isDirectory()){   
                   //1 根据不同的操作系统拿到相应的 destDirName 和 destFileName   
                   String compressFileName = fh.getFileNameString().trim();   
                   String destFileName = "";   
                   String destDirName = "";   
                   compressFileName = new String(compressFileName.getBytes("UTF-8"),"GB2312");
                   //非windows系统   
                   if(File.separator.equals("/")){   
                       destFileName = destDir + compressFileName.replaceAll("\\\\", "/");   
                       destDirName = destFileName.substring(0, destFileName.lastIndexOf("/"));   
                   //windows系统    
                   }else{   
                       destFileName = destDir + compressFileName.replaceAll("/", "\\\\");   
                       destDirName = destFileName.substring(0, destFileName.lastIndexOf("\\"));   
                   }   
                   //2创建文件夹   
                   File dir = new File(destDirName);   
                   if(!dir.exists()||!dir.isDirectory()){   
                       dir.mkdirs();   
                   }   
                   //3解压缩文件   
                   fos = new FileOutputStream(new File(destFileName));   
                   a.extractFile(fh, fos);   
                   fos.close();
                   fos = null;
               }   
               fh = a.nextFileHeader();   
           }   
           a.close();   
           a = null;   
       }catch(Exception e){   
           throw e;   
       }finally{   
           if(fos!=null){   
               try{fos.close();fos=null;}catch(Exception e){e.printStackTrace();}   
           }   
           if(a!=null){   
               try{a.close();a=null;}catch(Exception e){e.printStackTrace();}   
           }   
       }   
   }   
}

三个包的下载链接：https://files.cnblogs.com/gongcb/libs.zip