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ynshun
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java压缩文件以及文件夹

 
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import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 
 * @desc <p> 
 *			java压缩文件和文件夹
 * 		</p>
 * @author ynshun
 * @version 1.0
 * @date 2013-8-1 下午2:23:38
 */
public class ZipCompressor {
	static final int BUFFER = 8192;
	private File zipFile;

	public ZipCompressor(String pathName) {
		zipFile = new File(pathName);
	}

	public void compress(String srcPathName) {
		File file = new File(srcPathName);
		if (!file.exists())
			throw new RuntimeException(srcPathName + "不存在!");
		try {
			FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
			CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream, new CRC32());
			ZipOutputStream out = new ZipOutputStream(cos);
			String basedir = "";
			compress(file, out, basedir);
			out.close();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	private void compress(File file, ZipOutputStream out, String basedir) {
		/* 判断是目录还是文件 */
		if (file.isDirectory()) {
			System.out.println("压缩:" + basedir + file.getName());
			this.compressDirectory(file, out, basedir);
		} else {
			System.out.println("压缩:" + basedir + file.getName());
			this.compressFile(file, out, basedir);
		}
	}

	/** 压缩一个目录 */
	private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
		if (!dir.exists())
			return;

		File[] files = dir.listFiles();
		for (int i = 0; i < files.length; i++) {
			/* 递归 */
			compress(files[i], out, basedir + dir.getName() + "/");
		}
	}

	/** 压缩一个文件 */
	private void compressFile(File file, ZipOutputStream out, String basedir) {
		if (!file.exists()) {
			return;
		}
		try {
			BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
			ZipEntry entry = new ZipEntry(basedir + file.getName());
			out.putNextEntry(entry);
			int count;
			byte data[] = new byte[BUFFER];
			while ((count = bis.read(data, 0, BUFFER)) != -1) {
				out.write(data, 0, count);
			}
			bis.close();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	/** 测试是否可以压缩 */
	public static void main(String[] args) {
		ZipCompressor zc = new ZipCompressor("E:\\szhzip.zip");// 压缩后的目标文件
		zc.compress("C:\\Users\\nengshun\\Desktop\\apk");// 需要压缩的文件
		System.out.println("OK....");
	}
}

 

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