Java--解压缩zip包 (一)

import java.io.IOException;


public class Test {
	public static void main(String[] args) throws IOException, Exception {
		String srcPath = "E:\\zhanglong.zip";
		String dstPath = "E:\\zhanglong";
		Decompression.unZip(srcPath, dstPath);
	}
}

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Decompression {

	//解压gzip数据
	public static String unGzip(InputStream is){
		String result = null;
		GZIPInputStream in = null;
		ByteArrayOutputStream arrayOutputStream = null;
		try {
			in = new GZIPInputStream(is);
			arrayOutputStream = new ByteArrayOutputStream();
			int len = -1;
			byte[] buffer = new byte[Constant.BUFFER];
			while ((len = in.read(buffer)) != -1) {
				arrayOutputStream.write(buffer, 0, len);
			}
			result = new String(arrayOutputStream.toByteArray(), Constant.UTF);
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				if(in != null){
					in.close();
				}
				if(arrayOutputStream != null){
					arrayOutputStream.close();
				}
				if(is != null){
					is.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return result;
	}

	//压缩gzip数据
	public static byte[] gzip(String data, String charset) {
		byte[] b = null;
		try {
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			GZIPOutputStream gzip = new GZIPOutputStream(bos);
			gzip.write(data.getBytes(charset));
			gzip.finish();
			gzip.close();
			b = bos.toByteArray();
			bos.close();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return b;
	}

	/**************************************************/
	//解压zip压缩包
	public static boolean unZip(String srcPath, String dstPath) {
		boolean isUnzipSuccess = false;
		boolean isDstFormat = false;
		int count = -1; 
		int index = -1;
		File dstFolder = new File(dstPath);
		if(!dstFolder.exists()) dstFolder.mkdirs();
		FileInputStream fis = null;
		ZipInputStream zis = null;
		FileOutputStream fos = null;
		BufferedOutputStream bos = null;
		try {
			ZipEntry entry = null;  
			fis = new FileInputStream(srcPath);
			zis = new ZipInputStream(new BufferedInputStream(fis));

			while ((entry = zis.getNextEntry()) != null) {
				byte[] data = new byte[Constant.BUFFER * 10];
				String temp = entry.getName();
				isDstFormat = isDstFormat(temp);
				if(!isDstFormat)
					continue;

				index = temp.lastIndexOf("/");
				if (index >





 -1) temp = temp.substring(index + 1);
				temp = dstPath + File.separator + temp;

				File file = new File(temp);
				file.createNewFile();

				fos = new FileOutputStream(file);
				bos = new BufferedOutputStream(fos, Constant.BUFFER * 10);

				while ((count = zis.read(data, 0, Constant.BUFFER * 10)) != -1) {    
					bos.write(data, 0, count);
				}

				bos.flush();
			}
			isUnzipSuccess = true;