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java实现文件的压缩功能

程序员文章站 2022-05-07 17:25:32
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package com.zl.myzip;

import java.io.File;
import java.io.IOException;

/**
 * 
 * @author 丢了风筝的线
 * @see 测试字符自定义文件的压缩
 */
public class TestMyZip {
	public static void main(String[] args) {
		MyZip myZip = new MyZip();
		try {
			myZip.zip("C:\\Users\\Administrator\\Desktop\\hello.zip",
					new File("D:\\新建文件夹\\20191014优就业\\Java\\JavaSECode\\ZIPfile"));
			System.out.println("压缩完成");
		} catch (IOException e) {

			e.printStackTrace();
		}
	}
}

package com.zl.myzip;

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

/**
 * 
 * @author 丢了风筝的线
 * @see 压缩文件
 */
public class MyZip {

	public void zip(String zipFileName, File inputFileNme) throws IOException {
		ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(zipFileName));
		zip(outputStream, inputFileNme, "");
		System.out.println("正在压缩中");
		outputStream.finish();

	}

	private void zip(ZipOutputStream out, File f, String base) throws IOException {

		// 判断当前文件对象是否是文件夹
		if (f.isDirectory()) {

			// 获取当前目录的下一级所有文件对象(包括文件夹对象)
			File[] fs = f.listFiles();

			// 判断当前文件夹是否有下级内容
			if (fs.length != 0) {
				if (base.length() != 0) {

					// 创建目录进入点,并将录入位置移动到目录进入点
					out.putNextEntry(new ZipEntry(base + "/"));
				}

				// 循环遍历每一层
				for (int i = 0; i < fs.length; i++) {
					zip(out, fs[i], base + fs[i]);
				}
			}
		} else {

			// 创建文件目录进入点,并将录入点移动到该目录进入点
			out.putNextEntry(new ZipEntry(base));

			// 输入文件到程序
			BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(f));
			int len;
			byte[] flush = new byte[1024];
			while ((len = bufferedInputStream.read()) != -1) {
				out.write(flush);
			}

			bufferedInputStream.close();
		}
	}

}