此类为使用 “deflate” 压缩格式压缩数据实现输出流过滤器

example

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.util.zip.Deflater;

import java.util.zip.DeflaterOutputStream;

import java.util.zip.Inflater;

import java.util.zip.InflaterOutputStream;

public class DeflaterOutputStreamIO {

    private static String inPath = "D:\\a.bat";

    private static String outPath = "D:\\b.bat";

    public static void main(String[] args) throws Exception {

        // 压缩文件

         deflater(inPath,outPath);

        // 解压文件

        Inflater(outPath, "D:\\c.bat");

    }

    /**

     *

     * @param outPath2

     *            压缩后的文件

     * @param str

     *            解压后的文件

     * @throws Exception

     */

    private static void Inflater(String outPath2, String str) throws Exception {

        FileInputStream fis = new FileInputStream(new File(outPath));

        FileOutputStream fos = new FileOutputStream(new File(str));

        InflaterOutputStream ios = new InflaterOutputStream(fos, new Inflater(true));

        byte[] b = new byte[1024];

        int len = 0;

        while ((len = fis.read(b)) != -1) {

            ios.write(b, 0, len);

        }

        fis.close();

        ios.close();

    }

    /**

     *

     * @param inPath

     *            原文件

     * @param outPath

     *            压缩后的文件

     * @throws Exception

     */

    public static void deflater(String inPath, String outPath) throws Exception {

        FileInputStream fis = new FileInputStream(new File(inPath));

        FileOutputStream fos = new FileOutputStream(new File(outPath));

        DeflaterOutputStream dos = new DeflaterOutputStream(fos,

                new Deflater(9,true));

        byte[] b = new byte[1024];

        int len = 0;

        while ((len = fis.read(b)) != -1) {

            dos.write(b, 0, len);

        }

        fis.close();

        dos.close();

    }

}