操作Zip压缩文件_Zip2Utils

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.Collection;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;


public class Zip2Utils {

	private static final int BUF_SIZE = 1024 * 1024;
	
	public static void main(String[] args){
		Collection<File> resFileList = new ArrayList<File>();
		
		resFileList.add( new File("d://temp//1.txt"));
		resFileList.add( new File("d://temp//2.txt"));
		File file3 = new File("d://temp//test.zip");
		
		try {
			//压缩文件
			Zip2Utils.zipFiles(resFileList, file3, "this is test");
			//解压缩文件
			Zip2Utils.upZipFile(file3, "d://ddd");
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	
	public static void zipFiles(Collection<File> resFileList , File zipFile ,String comment) throws IOException{
		ZipOutputStream out  = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile),BUF_SIZE));
		for(File file:resFileList){
			Zip2Utils.zipFile(file, out, "");
		}
		out.close(); 
	}
	
	public static void zipFile(File resFile, ZipOutputStream zipout, String rootpath) throws IOException{
		rootpath = rootpath + (rootpath.trim().length() == 0 ? "" : File.separator) + resFile.getName();    
        System.out.println(rootpath);
		if (resFile.isDirectory()) {    
                File[] fileList = resFile.listFiles();    
                for (File file : fileList) {    
                        zipFile(file, zipout, rootpath);    
                }    
        } else {    
                byte buffer[] = new byte[BUF_SIZE];    
                BufferedInputStream in = new BufferedInputStream(new FileInputStream(resFile), BUF_SIZE);    
                zipout.putNextEntry(new ZipEntry(rootpath));    
                int realLength;    
                while ((realLength = in.read(buffer)) != -1) {    
                        zipout.write(buffer, 0, realLength);    
                }    
                in.close();    
                zipout.flush();    
                zipout.closeEntry();    
        }    	
	}
	/**   
     * 解压缩一个文件   
     *   
     * @param zipFile        压缩文件   
     * @param folderPath 解压缩的目标目录   
     * @throws IOException 当压缩过程出错时抛出   
     */    
    public static void upZipFile(File zipFile, String folderPath) throws IOException {    
    		File targetFolder = new File(folderPath);
    		if(!targetFolder.exists()){
    			targetFolder.mkdir();
    		}
            ZipFile zf = new ZipFile(zipFile);    
            for (Enumeration entries = zf.entries(); entries.hasMoreElements();) {    
                    ZipEntry entry = ((ZipEntry) entries.nextElement());    
                    InputStream in = zf.getInputStream(entry);    
                    OutputStream out = new FileOutputStream(folderPath + File.separator + entry.getName());    
                    byte buffer[] = new byte[BUF_SIZE];    
                    int realLength;    
                    while ((realLength = in.read(buffer)) > 0) {    
                            out.write(buffer, 0, realLength);    
                    }    
                    in.close();    
                    out.close();    
            }    
    }    

}