java 压缩、解压

1、压缩

package test;

import java.io.*;
import java.util.zip.*;

public class ZipCompressing {
	private int k = 1; // 定义递归次数变量

	private void zip(String zipFileName, File inputFile) throws Exception {
		System.out.println("压缩中...");
		ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
		BufferedOutputStream bo = new BufferedOutputStream(out);
		zip(out, inputFile, inputFile.getName(), bo);
		bo.close();
		out.close(); // 输出流关闭
		System.out.println("压缩完成");
	}

	private void zip(ZipOutputStream out, File f, String base, BufferedOutputStream bo) throws Exception { // 方法重载
		if (f.isDirectory()) {
			File[] fl = f.listFiles();
			if (fl.length == 0) {
				out.putNextEntry(new ZipEntry(base + "/")); // 创建zip压缩进入点base
				System.out.println(base + "/");
			}
			for (int i = 0; i < fl.length; i++) {
				zip(out, fl[i], base + "/" + fl[i].getName(), bo); // 递归遍历子文件夹
			}
			System.out.println("第" + k + "次递归");
			k++;
		} else {
			out.putNextEntry(new ZipEntry(base)); // 创建zip压缩进入点base
			System.out.println(base);
			FileInputStream in = new FileInputStream(f);
			BufferedInputStream bi = new BufferedInputStream(in);
			int b;
			while ((b = bi.read()) != -1) {
				bo.write(b); // 将字节流写入当前zip目录
			}
			bi.close();
			in.close(); // 输入流关闭
		}
	}

	/**
	 * 测试
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		ZipCompressing book = new ZipCompressing();
		try {
			book.zip("G:\\暂存.zip", new File("G:\\暂存"));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

 

2、解压

package test;

import java.io.*;
import java.util.zip.*;

public class ZipDecompressing {
	public static void main(String[] args) {
		long startTime = System.currentTimeMillis();
		try {
			ZipInputStream Zin = new ZipInputStream(new FileInputStream("G:\\暂存.zip"));// 输入源zip路径
			BufferedInputStream Bin = new BufferedInputStream(Zin);
			String Parent = "G:"; // 输出路径（文件夹目录）
			File Fout = null;
			ZipEntry entry;
			try {
				while ((entry = Zin.getNextEntry()) != null && !entry.isDirectory()) {
					Fout = new File(Parent, entry.getName());
					if (!Fout.exists()) {
						(new File(Fout.getParent())).mkdirs();
					}
					FileOutputStream out = new FileOutputStream(Fout);
					BufferedOutputStream Bout = new BufferedOutputStream(out);
					int b;
					while ((b = Bin.read()) != -1) {
						Bout.write(b);
					}
					Bout.close();
					out.close();
					System.out.println(Fout + "解压成功");
				}
				Bin.close();
				Zin.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		long endTime = System.currentTimeMillis();
		System.out.println("耗费时间： " + (endTime - startTime) + " ms");
	}
}