java压缩  GZIP进行简单压缩，ZIP进行多文件保存

package org.rui.io.compress;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileReader;import java.io.InputStreamReader;import java.util.zip.GZIPInputStream;import java.util.zip.GZIPOutputStream;/** * 用GZIP进行简单压缩 * @author lenovo * */public class GZIPcompress {	static String path="D:\\Users\\liangrui\\workspace\\thinking\\src\\org\\rui\\io\\compress\\";	static String [] arg=new String[]{path+"GZIPcompress.java"};	public static void main(String[] args) throws Exception {		//in		BufferedReader in=new BufferedReader(new FileReader(arg[0]));		//out		BufferedOutputStream out=new BufferedOutputStream(new GZIPOutputStream(				new FileOutputStream("test.gz")				));		System.out.println("writing file");		int c;		while((c=in.read())!=-1)		{			out.write(c);		}		//close		in.close();		out.close();		System.out.println("reading file================");		BufferedReader br=new BufferedReader(				new InputStreamReader(						new GZIPInputStream(								new FileInputStream("test.gz")								)						)				);				String s;		while((s=br.readLine())!=null)			System.out.println(s);	}}

package org.rui.io.compress;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.util.Enumeration;import java.util.zip.Adler32;import java.util.zip.CheckedInputStream;import java.util.zip.CheckedOutputStream;import java.util.zip.ZipEntry;import java.util.zip.ZipFile;import java.util.zip.ZipInputStream;import java.util.zip.ZipOutputStream;/** * 用Zip进行多文件保存 * @author lenovo * */public class ZipCompress {	//static String path="D:\\Users\\liangrui\\workspace\\thinking\\src\\org\\rui\\io\\compress\\";	static String path=new File("").getAbsolutePath()+"\\src\\org\\rui\\io\\compress\\";	static String [] arg=new String[]{path+"GZIPcompress.java",path+"ZipCompress.java"};		public static void main(String[] args) throws Exception {		//out		FileOutputStream f=new FileOutputStream("test.zip");		CheckedOutputStream cos=new CheckedOutputStream(f,new Adler32());		ZipOutputStream zos=new ZipOutputStream(cos);		//out		BufferedOutputStream out=new BufferedOutputStream(zos);		zos.setComment("A test of java zipping");				for(String s:arg)		{			System.out.println("writing file "+s);			BufferedReader in =new BufferedReader(new FileReader(s));			//			zos.putNextEntry(new ZipEntry(s));			int c;			while((c=in.read())!=-1){				out.write(c);			}			in.close();			out.flush();		}				out.close();		//checksum valid only after the file has been closed!		System.out.println("reading file================");		FileInputStream fi=new FileInputStream("test.zip");		CheckedInputStream csumi=new CheckedInputStream(fi,new Adler32());		ZipInputStream zis=new ZipInputStream(csumi);		BufferedInputStream bis=new BufferedInputStream(zis);		ZipEntry ze;		while((ze=zis.getNextEntry())!=null)		{			System.out.println("Reading file "+ze);			int x;			while((x=bis.read())!=-1)			{				//System.out.print((char)x);				System.out.write(x);			}		}				//		if(arg.length==1)			System.out.println("checksum:"+csumi.getChecksum().getValue());		bis.close();		//alternative way to open and read zip files		ZipFile zf=new ZipFile("test.zip");				Enumeration e=zf.entries();		while(e.hasMoreElements())		{			ZipEntry ze2=(ZipEntry) e.nextElement();			System.out.println("file:"+ze2);			//...and extract the data as before		}		/*if(arg.length==1)*/			}}