zip压缩

package com.green.project.compress;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Zip {
/**
* 压缩整个文件夹中的所有文件，生成指定名称的zip压缩包
* @param filepath 文件所在目录
* @param zippath 压缩后zip文件名称
* @param dirFlag zip文件中第一层是否包含一级目录，true包含；false没有
* 2015年6月9日
*/
public void zip(String filepath ,String zippath, boolean dirFlag) {
try {
File file = new File(filepath);// 要被压缩的文件夹
File zipFile = new File(zippath);
ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
if(file.isDirectory()){
File[] files = file.listFiles();
for(File fileSec:files){
if(dirFlag){
recursionZip(zipOut, fileSec, file.getName() + File.separator);
}else{
recursionZip(zipOut, fileSec, "");
}
}
}
zipOut.close();
} catch (Exception e) {
e.printStackTrace();
}
}

private void recursionZip(ZipOutputStream zipOut, File file, String baseDir) throws Exception{
if(file.isDirectory()){
File[] files = file.listFiles();
for(File fileSec:files){
recursionZip(zipOut, fileSec, baseDir + file.getName() + File.separator);
}
}else{
byte[] buf = new byte[1024];
InputStream input = new FileInputStream(file);
zipOut.putNextEntry(new ZipEntry(baseDir + file.getName()));
int len;
while((len = input.read(buf)) != -1){
zipOut.write(buf, 0, len);
}
input.close();
}
}
}