Java壓縮/解壓ZIP

轉載自 http://www.linuxidc.com/Linux/2012-01/52309.htm

使用ant.jar中的org.apache.tools.zip.*

import java.io.BufferedInputStream;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.InputStream;  
import java.util.Enumeration;  
  
import org.apache.tools.zip.ZipEntry;  
import org.apache.tools.zip.ZipFile;  
import org.apache.tools.zip.ZipOutputStream;  
  
public class ZipUtil {  
      
    public boolean zip(String zipFilePath,String[] fromZipFileArray) throws Exception  
    {  
        File toZipFile = new File(zipFilePath);  
        if (!toZipFile.exists())  
        {  
            toZipFile.createNewFile();  
        }  
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(toZipFile));  
        for (String str : fromZipFileArray)  
        {  
            this.writeToZip(out, new File(str), "");  
        }  
        out.close();  
        return true;  
    }  
      
    private void writeToZip(ZipOutputStream out,File fromZipFile,String base) throws Exception  
    {  
        if (fromZipFile.isDirectory())  
        {  
            for (File file : fromZipFile.listFiles())  
            {  
                this.writeToZip(out, file, base + fromZipFile.getName() + File.separator);  
            }  
        }  
        else  
        {  
            //add this file   
            this.addFileToZip(out,fromZipFile,base + fromZipFile.getName());  
        }  
    }  
      
    private void addFileToZip(ZipOutputStream out,File file,String base) throws Exception  
    {  
        byte[] buff = new byte[1024];  
        int bytesRead = -1;  
        ZipEntry entry = new ZipEntry(base);  
        out.putNextEntry(entry);  
        InputStream in = new BufferedInputStream(new FileInputStream(file));  
        while (-1 != (bytesRead = in.read(buff, 0, buff.length))) {  
            out.write(buff, 0, bytesRead);  
        }  
        in.close();  
        out.flush();  
    }  
      
    public void unzip(String zipFilePath,String unzipFilePath) throws Exception  
    {  
        ZipFile zipfile = new ZipFile(zipFilePath,"GB2312");  
        Enumeration enu = zipfile.getEntries();  
        while(enu.hasMoreElements())  
        {  
            ZipEntry entry = (ZipEntry)enu.nextElement();  
            this.writeToDir(zipfile, entry, new File(unzipFilePath + File.separator + entry.getName()));  
              
        }  
    }  
      
    private void writeToDir(ZipFile zip, ZipEntry entry, File toFile) throws Exception  
    {  
        if (!entry.isDirectory()) {  
            File file = toFile.getParentFile();  
            if (!file.exists())  
            {  
                file.mkdirs();  
            }  
            FileOutputStream fos = new FileOutputStream(toFile);  
            byte[] buffer = new byte[1024];  
            InputStream is = zip.getInputStream(entry);  
            int len;  
            while((len = is.read(buffer,0,buffer.length)) != -1)  
            {  
                fos.write(buffer,0,len);  
            }  
            fos.close();  
        }  
    }  
}  

調用方法

new ZipUtil().zip("D:\\ziptest.zip", new String[]{"D:\\ziptest"});  
new ZipUtil().unzip("D:\\ziptest.zip", "E:\\");