zipcompress.java

运用java.util.zip包创建的一个生成ZIP压缩文件的基础类

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

/***
 * 压缩为ZIP文件
 * @version 1.0.0
 * @author kuangyoubo
****/

public class ZipCompress {
  public static void main(String[] args) {
    try {
      FileOutputStream f = new FileOutputStream("test.zip");
      CheckedOutputStream csum = new CheckedOutputStream( f, new Adler32());
      ZipOutputStream out = new ZipOutputStream( new BufferedOutputStream(csum));
      out.setComment("A test of Java Zipping");
      for(int i = 0; i < args.length; i++) {
        System.out.println(
          "Writing file " + args[i]);
        BufferedReader in =
          new BufferedReader(
            new FileReader(args[i]));
        out.putNextEntry(new ZipEntry(args[i]));
        int c;
        while((c = in.read()) != -1)
          out.write(c);
        in.close();
      }
      out.close();
      System.out.println("Checksum: " +csum.getChecksum().getValue());
      System.out.println("Reading file");
      FileInputStream fi =  new FileInputStream("test.zip");
      CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
      ZipInputStream in2 = new ZipInputStream( new BufferedInputStream(csumi));
      ZipEntry ze;
      System.out.println("Checksum: " + csumi.getChecksum().getValue());
      while((ze = in2.getNextEntry()) != null) {
        System.out.println("Reading file " + ze);
        int x;
        while((x = in2.read()) != -1)
          System.out.write(x);
      }
      in2.close();
      ZipFile zf = new ZipFile("test.zip");
      Enumeration e = zf.entries();
      while(e.hasMoreElements()) {
        ZipEntry ze2 = (ZipEntry)e.nextElement();
        System.out.println("File: " + ze2);
      }
    } catch(Exception e) {
      e.printStackTrace();
    }
  }
}