java压缩文件夹

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Test {

	/**
	 * 缓冲区大小
	 */
	protected static final int BUFFER = 8192;
	
	/**
	 * 压缩文件夹，并把压缩包存放在与该文件夹统计的目录下，压缩包名称为： 文件夹名称 + “.zip”
	 * 
	 * @param directory 要压缩的文件夹
	 * @param destDir 压缩包存放的文件夹路径
	 * @param fileName 压缩包名称
	 * @return File 压缩包文件
	 * @throws Exception 
	 */
	public static File zipFile(String directory, String destDir, String fileName) throws Exception {
		File dir = new File(directory);
		if(!dir.exists())
			return null;
		String zipFileName = destDir;
		if(!zipFileName.endsWith("\\")){
			zipFileName += "\\";
		}
		
		if(!fileName.endsWith("zip")) {
			zipFileName += fileName + ".zip";
		}
		else {
			zipFileName += fileName;
		}
		
		File zipFile = new File(zipFileName);
		FileOutputStream fileOS = null;
		ZipOutputStream zipOut = null;
		
		try{
	        fileOS = new FileOutputStream(zipFile);
	        zipOut = new ZipOutputStream(fileOS);
	        String baseDir = "";
	        zip(dir, zipOut, baseDir);
        }
        catch(FileNotFoundException e){
        	zipFile = null;
        	throw e;
        }
        catch(Exception e){
        	zipFile = null;
	        e.printStackTrace();
	        throw e;
        }
        finally{
        	try{
        		if(zipOut != null) {
        			zipOut.close();
        		}
            }
            catch(IOException e){
	            e.printStackTrace();
            }
        }
		
		return zipFile;
	}
	
	/**
	 * 压缩文件
	 * 
	 * @param file 要压缩的文件
	 * @param zipOut 输出流
	 * @param baseDir 压缩包里的起始文件夹,压缩的文件都放在这个文件夹下
	 * @throws Exception 
	 */
	public static void zip(File file, ZipOutputStream zipOut, String baseDir) throws Exception{
		if(!file.exists())
			return;
		//判断是目录还是文件
		if(file.isDirectory()){
			zipDirectory(file, zipOut, baseDir);
		}
		else{
			zipSingleFile(file, zipOut, baseDir);
		}
	}
	
	/**
	 * 压缩目录
	 */
	public static void zipDirectory(File dir, ZipOutputStream zipOut, String baseDir)throws Exception{
		if(!dir.exists()) {
			return;
		}
		
		File[] files = dir.listFiles();
		for(File file : files){
			//递归
			zip(file, zipOut, baseDir + dir.getName() + "\\");
		}
	}
	
	
	/**
	 * 压缩一个具体文件
	 * 
	 * @param file 文件
	 * @param zipOut
	 * @param baseDir void
	 */
	public static void zipSingleFile(File file, ZipOutputStream zipOut, String baseDir) throws Exception{
		if(!file.exists()) {
			return;			
		}
		BufferedInputStream bis = null;
		try{
	        bis = new BufferedInputStream(new FileInputStream(file));
	        ZipEntry entry = new ZipEntry(baseDir + file.getName());
	        zipOut.putNextEntry(entry);
	        
	        int count = 0;
	        byte[] data = new byte[BUFFER];
	        while(count != -1){
	        	count = bis.read(data, 0, BUFFER);
	        	if(count != -1) {
	        		zipOut.write(data, 0, count);
	        	}
	        }
        }
        finally{
        	try{
        		if(bis != null) {
        			bis.close();
        		}
            }
            catch(IOException e){
	            e.printStackTrace();
            }
        }
	}



	public static void main(String[] args) {
		try {
			// 注意这里的E:\\test1需事先存在
			zipFile("E:\\test", "E:\\test1", "testZip");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
}