Java编程思想：压缩

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

public class Test {
    public static void main(String[] args){
//        GZIPCompress.test();
        ZIPCompress.test();
    }
}

class GZIPCompress {
    public static void test() {
        try {
            //创建一个字符输入流
            BufferedReader in = new BufferedReader(new FileReader("temp.tmp"));

            //创建一个压缩输出流
            BufferedOutputStream out = new BufferedOutputStream(
                    new GZIPOutputStream(
                            new FileOutputStream("temp1.tmp")));

            System.out.println("Writing File...");

            int c;
            while ((c = in.read()) != -1) {
                out.write(c);
            }

            in.close();
            out.close();

            System.out.println("Reading File...");
            BufferedReader in2 = new BufferedReader(
                    new InputStreamReader(
                            new GZIPInputStream(
                                    new FileInputStream("temp1.tmp"))));
            String s;
            while ((s = in2.readLine()) != null) {
                System.out.println(s);
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

class ZIPCompress {
    public static void test() {
        String[] args = new String[]{
                "temp.tmp",
                "temp1.tmp",
                "temp2.tmp",
                "temp3.tmp",
                "temp4.tmp",
        };
        try {
            //进行压缩
            FileOutputStream f = new FileOutputStream("test.zip");
            CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
            ZipOutputStream zos = new ZipOutputStream(csum);
            BufferedOutputStream out = new BufferedOutputStream(zos);

            zos.setComment("A Test Of Java Zipping...");

            for (String arg : args) {
                System.out.println("Writing file: " + arg);
                BufferedReader in = new BufferedReader(new FileReader(arg));
                zos.putNextEntry(new ZipEntry(arg));
                int c;
                while ((c = in.read()) != -1) {
                    out.write(c);
                }
                in.close();
                out.flush();
            }
            out.close();

            System.out.println("Checksum:"+csum.getChecksum().getValue());

            //进行解压
            /*
            System.out.println("Reading File...");
            FileInputStream fi = new FileInputStream("test.zip");
            CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
            ZipInputStream in = new ZipInputStream(csumi);
            BufferedInputStream bis = new BufferedInputStream(in);

            ZipEntry ze;
            while ((ze = in.getNextEntry()) != null) {
                System.out.println("Reading File: " + ze);
                int x;
                while ((x = bis.read()) != -1) {
                    System.out.println(x);
                }
            }
            bis.close();
            */
            //查看压缩文件的目录
            ZipFile zf = new ZipFile("test.zip");
            Enumeration e = zf.entries();
            while (e.hasMoreElements()) {
                ZipEntry ze2 = (ZipEntry)e.nextElement();
                System.out.println("File: "+ze2);
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}