javaは圧縮と解凍を実現します。

4738 ワード

駅の中の兄弟の記事から:
http://wallimn.iteye.com/blog/566739
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

public class ZipToFile {
	
	public static final String ZIP_FILENAME	= "C:\\XJPDA.zip";//         
	public static final String ZIP_DIR = "C:\\XJPDA\\";//        
	public static final String UN_ZIP_DIR = "C:\\";//        
	public static final int BUFFER = 1024 ;//    
	
	/**
	* zip    .
	*   baseDir(     )     ,     
	* @throws Exception
	*/
	public static void zipFile(String baseDir,String fileName) throws Exception{
		List fileList=getSubFiles(new File(baseDir));
		ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(fileName));
		ZipEntry ze=null;
		byte[] buf=new byte[BUFFER];
		int readLen=0;
		for(int i = 0; i <fileList.size(); i++) {
			File f=(File)fileList.get(i);
			ze=new ZipEntry(getAbsFileName(baseDir, f));
			ze.setSize(f.length());
			ze.setTime(f.lastModified());	
			zos.putNextEntry(ze);
			InputStream is=new BufferedInputStream(new FileInputStream(f));
			while ((readLen=is.read(buf, 0, BUFFER))!=-1) {
				zos.write(buf, 0, readLen);
			}
			is.close();
		}
		zos.close();
	}
	
	/**
	*      ,             ,  zip      .
	* @param baseDir java.lang.String    
	* @param realFileName java.io.File       
	* @return      
	*/
	private static String getAbsFileName(String baseDir, File realFileName){
		File real=realFileName;
		File base=new File(baseDir);
		String ret=real.getName();
		while (true) {
			real=real.getParentFile();
			if(real==null) 
				break;
			if(real.equals(base)) 
				break;
			else
				ret=real.getName()+"/"+ret;
		}
		return ret;
	}
	
	/**
	*               ,     .
	* @param baseDir File      
	* @return   java.io.File List
	*/
	private static List getSubFiles(File baseDir){
		List ret=new ArrayList();
		File[] tmp=baseDir.listFiles();
		for (int i = 0; i <tmp.length; i++) {
			if(tmp[i].isFile())
				ret.add(tmp[i]);
			if(tmp[i].isDirectory())
				ret.addAll(getSubFiles(tmp[i]));
		}
		return ret;
	}
	
	/**
	*      .
	*  ZIP_FILENAME     ZIP_DIR   .
	* @throws Exception
	*/
	public static void upZipFile() throws Exception{
		ZipFile zfile=new ZipFile(ZIP_FILENAME);
		Enumeration zList=zfile.entries();
		ZipEntry ze=null;
		byte[] buf=new byte[1024];
		while(zList.hasMoreElements()){
			ze=(ZipEntry)zList.nextElement();		
			if(ze.isDirectory()){
	            File f=new File(ZIP_DIR+ze.getName());
	            f.mkdir();
				continue;
			}
			OutputStream os=new BufferedOutputStream(new FileOutputStream(getRealFileName(ZIP_DIR, ze.getName())));
			InputStream is=new BufferedInputStream(zfile.getInputStream(ze));
			int readLen=0;
			while ((readLen=is.read(buf, 0, 1024))!=-1) {
				os.write(buf, 0, readLen);
			}
			is.close();
			os.close();	
		}
		zfile.close();
	}

	/**
	*      ,                 .
	* @param baseDir      
	* @param absFileName      ,   ZipEntry  name
	* @return java.io.File      
	*/
	public static File getRealFileName(String baseDir, String absFileName){
		String[] dirs=absFileName.split("/");
		File ret=new File(baseDir);
		if(dirs.length>1){
			for (int i = 0; i < dirs.length-1;i++) {
				ret=new File(ret, dirs[i]);
			}
			if(!ret.exists())
				ret.mkdirs();
			ret=new File(ret, dirs[dirs.length-1]);
			return ret;
		}
		return ret;
	}

}
中国語の問題があります。
java.util.zipのフォーマット変換に問題があるからです。

import java.util.zip.Zip Entry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutput Stream
せいにする
import org.apache.tools.zip.*;
いいです
apacheでこの現象を修正しました。