gszip.java

一个日本流行的,功能较全的开源Web办公管理(Groupware)系统。

package jp.co.sjts.gsession.tools.archive;

import java.io.File;
import java.io.FileInputStream;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Vector;
import java.util.zip.ZipEntry;
import java.util.zip.CRC32;
import java.util.zip.ZipOutputStream;
import java.util.zip.CheckedOutputStream;

public class GSZip {

	private String dirname = null;
	private String zipname = null;
	private String pathname = null;

	public GSZip(String dirname,String zipname,String pathname) {
		this.dirname = dirname;
		this.zipname = zipname;
		this.pathname = pathname;
	}

	public GSZip(File dir,File zip,File path) {
		this.dirname = dir.getPath();
		this.zipname = zip.getPath();
		this.pathname = path.getPath();
	}

	public void write() throws IOException,Exception {
		try {
			byte[] buf = new byte[1024*8];
			Vector vec = new Vector();

			if(dirname.lastIndexOf(File.separator) == dirname.length() - 1)
				dirname = dirname.substring(0,dirname.length() - 1);

			FileDetect top = new FileDetect( new File( dirname ));
			top.path = dirname;
			top.getfile(vec);

			int length = dirname.length();

			FileOutputStream f = new FileOutputStream(pathname + zipname);
			CheckedOutputStream csum = new CheckedOutputStream(f,new CRC32());

			ByteArrayOutputStream bao = new ByteArrayOutputStream();
			ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(csum));
			out.setComment("GSDATA Backup to Zipping");
			PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter("ziplog")));

			for(int i=0; i<vec.size(); i++) {
				bao.reset();
				BufferedInputStream bis = new BufferedInputStream(new FileInputStream((String)vec.get(i)));

				int result;
				do {
					result = bis.read(buf,0,buf.length);
					if(result != -1)
						bao.write(buf,0,result);
				}while (result == buf.length);

				String o = ("GSDATA" + ((String)vec.get(i)).substring(length));
				out.putNextEntry(new ZipEntry(o));
				pw.println(vec.get(i));

				byte[] data = bao.toByteArray();
				out.write(data);
				bis.close();
			}
			out.close();
		}
		catch( IOException ie ) {
			throw new IOException(ie.toString());
		}
		catch( Exception e ) {
			throw new Exception(e.toString());
		}
	}
}