java压缩文件

利用org.apche.tools.zip.ZipOutputStream可以很好的将文件压缩保存，下面的例子是利用递归的方法将文件压缩的例子

import java.io.*;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
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/**
 * 提供文件压缩的常用方法
 */
public class ZipUtil {
    /**
     *
     * @param src 源文件或者目录
     * @param dest 压缩文件的目标路径
     */
    public static void zip(String src,String dest){
        ZipOutputStream out = null;
        try {
            File outFile = new File(dest);
            out = new ZipOutputStream(outFile);
            File fileDirectory = new File(src);

            if(fileDirectory.isFile()){
                zipFileOrDirectory(out,fileDirectory,"");
            }else{
                File [] entries = fileDirectory.listFiles();
                zipFileOrDirectory(out, fileDirectory, "");
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(out != null){
                try {
                    out.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

    private static void zipFileOrDirectory(ZipOutputStream out,File fileOrDirectory,String curPath){
        FileInputStream in = null;
        try {
            if(!fileOrDirectory.isDirectory()){//判断当前不是一个目录级
                byte[] buffer = new byte[4096];
                int bytes_read;
                in = new FileInputStream(fileOrDirectory);

                ZipEntry entry = new ZipEntry(curPath + fileOrDirectory.getName());
                out.putNextEntry(entry);

                while((bytes_read = in.read(buffer)) != -1){
                    //buffer=要写入的数据，0=偏移量，bytes_read=要写入的字节长度
                    out.write(buffer, 0 ,bytes_read);
                }
                out.closeEntry();
            }else{
                File[] entries = fileOrDirectory.listFiles();
                for(int i = 0;i < entries.length;i++){
                    zipFileOrDirectory(out, entries[i], curPath + fileOrDirectory.getName() + "/");//递归分解目录中的文件
                }
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(in != null){
                try {
                    in.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}