ZIP 压缩解压缩

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipInputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;



/**
 *  压缩包操作类(压缩,解压)
 * @author whp
 *
 */
public class Zip {
	private int bufferSize;
	private byte[] bufferByte;
	
	
	public Zip(){
		this(512);   // 默认缓冲值
	}
	public Zip(int bufferSize){   // 手工设置缓冲值
		this.bufferSize=bufferSize;
		this.bufferByte=new byte[bufferSize];
	}
	/**
	 *  压缩文件(主方法可暴露接口)
	 * @param filePath  	文件夹名
	 * @throws IOException 
	 */
	public void inZip(String filePath)  {
		File file=null;
		String zipPath="";
		ZipOutputStream zipS=null;
		try{
			file=new File(filePath);
			if(!file.exists()){           // 判断文件是否存在
				System.out.println(file.getName()+"文件不存在!");
				return;
			}
			zipPath=file.getAbsolutePath()+".zip";    // 压缩后的压缩包名字
			zipS=new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipPath)));   // 此地方要加绝对路径
			
			this.handleDir(file, zipS,"");  
			zipS.close();   // 关闭流
			System.out.println(file.getName()+"压缩成功");
		
		}catch(IOException e1){
			System.out.println("读文件错误");
			e1.printStackTrace();
		}
	}
	
	/**
	 *  解压缩文件
	 * @param filePath  压缩文件
	 */
	public void UnZip(String filePath){
		ZipInputStream inStream=null;
		ZipEntry entry;
		File file=new File(filePath);
		if(!file.exists()){             // 判断文件是否存在
			System.out.println(file.getName()+"文件不存在!");
			return;
		}
		
		try {
			inStream=new ZipInputStream(new BufferedInputStream(new FileInputStream(filePath)));
			while((entry=(ZipEntry) inStream.getNextEntry())!=null){
				String name=entry.getName();
				File file1=new File(file.getParent()+name);   // file.getParent() 输出目录
				if(entry.isDirectory()){   // 是目录
					file1.mkdir();
				}else{
					File parent=file1.getParentFile();   // 判断文件父目录是否存在
					if(!parent.exists()){
						parent.mkdirs();
					}
					FileOutputStream outStream=new FileOutputStream(file1);
					int bufferSize;
					while((bufferSize=inStream.read(this.bufferByte))>0){  // 缓冲流
						outStream.write(bufferSize);
					}
					outStream.flush();
					outStream.close();
				}
				inStream.closeEntry();
				System.out.println(file.getName()+"解压成功");
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	
	/**
	 *  压缩文件的方法
	 * @param file    压缩文件
	 * @param zipS    压缩包
	 * @param path    ZIpEntry 的实体路径
	 * @throws IOException
	 */
	private void handleDir(File file,ZipOutputStream zipS,String path) throws IOException  {
		if(file.isDirectory()){   // 文件夹
			        String  s=path.equals("")?file.getName():path;
					File[] files=file.listFiles();
					
					if(files.length==0){  // 空目录
						ZipEntry entry=new ZipEntry(path+"/");
						zipS.putNextEntry(entry);
						zipS.closeEntry();
					}
					for(File filename:files){
						String rename=s+"/"+filename.getName();
						this.handleDir(filename, zipS,rename);
					}
		}else{  // 文件
			FileInputStream fileStream=new FileInputStream(file);
			ZipEntry zip=new ZipEntry(path);  // 构造实体
			zipS.putNextEntry(zip);
			
			int bufferSize;
			while((bufferSize=fileStream.read(this.bufferByte))>0){  // 读字节流缓冲
				zipS.write(bufferSize);
			}
			zipS.flush();
			zipS.closeEntry();
		}
		
	}
	 

	public static void main(String[] args) throws IOException {
		
		
		Zip zip=new Zip(512);
		long begin=System.currentTimeMillis();
		zip.inZip("F://11");
		//zip.UnZip("F://11.zip");
		long end=System.currentTimeMillis();
		System.out.println("time="+(end-begin));  // 执行时间
		
		

	}
	
	

}