java解压文件

private static final int buffer = 2048;
private static final Logger logger = Logger.getLogger(Logger.class);
/**
* 解压Zip文件
* @param path 文件目录
*/
public static void unZip(String path)
{
int count = -1;
String savepath = "";

File file = null;
InputStream is = null;
FileOutputStream fos = null;
BufferedOutputStream bos = null;

savepath = path.substring(0, path.lastIndexOf(".")) + File.separator; //保存解压文件目录
new File(savepath).mkdir(); //创建保存目录
ZipFile zipFile = null;
try
{
zipFile = new ZipFile(path,"gbk"); //解决中文乱码问题
Enumeration<?> entries = zipFile.getEntries();

while(entries.hasMoreElements())
{
byte buf[] = new byte[buffer];

ZipEntry entry = (ZipEntry)entries.nextElement();

String filename = entry.getName();
boolean ismkdir = false;
if(filename.lastIndexOf("/") != -1){ //检查此文件是否带有文件夹
ismkdir = true;
}
filename = savepath + filename;

if(entry.isDirectory()){ //如果是文件夹先创建
file = new File(filename);
file.mkdirs();
continue;
}
file = new File(filename);
if(!file.exists()){ //如果是目录先创建
if(ismkdir){
new File(filename.substring(0, filename.lastIndexOf("/"))).mkdirs(); //目录先创建
}
}
file.createNewFile(); //创建文件

is = zipFile.getInputStream(entry);
fos = new FileOutputStream(file);
bos = new BufferedOutputStream(fos, buffer);

while((count = is.read(buf)) > -1)
{
bos.write(buf, 0, count);
}
bos.flush();
bos.close();
fos.close();

is.close();
}

zipFile.close();

}catch(IOException ioe){
ioe.printStackTrace();
}finally{
try{
if(bos != null){
bos.close();
}
if(fos != null) {
fos.close();
}
if(is != null){
is.close();
}
if(zipFile != null){
zipFile.close();
}
}catch(Exception e) {
e.printStackTrace();
}
}
}