Java解压、压缩文件

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
/*
* 该包在spring2.0里面有
*/

public class ConpressFile {
private static ConpressFile instance=new ConpressFile();
private ConpressFile(){}
public static ConpressFile getInstance(){
return instance;

}
public synchronized void zip(String tFilinputFileNameeName,String zipFileName) throws IOException {
zip(new File(tFilinputFileNameeName),zipFileName);
}
private synchronized void zip(File file, String zipFileName) throws IOException {
ZipOutputStream out=new ZipOutputStream(new FileOutputStream(zipFileName));
try {
zip(file,out,"");
} catch (RuntimeException e) {
e.printStackTrace();
}
finally{
out.close();
}
}
private synchronized void zip(File file, ZipOutputStream out, String string) throws IOException {
if(file.isDirectory()){
File[] files=file.listFiles();
out.putNextEntry(new ZipEntry(string+"/"));
string=string.length()==0?"":"/";
for (int i = 0; i < files.length; i++) {
zip(files[i],out,string+files[i].getName());
}
}else{
if(string.length()>0){
out.putNextEntry(new ZipEntry(string));
}else{
out.putNextEntry(new ZipEntry(file.getName()));
}
FileInputStream in=new FileInputStream(file);
try {
int c;
byte[] buf=new byte[1024];
while ((c=in.read(buf))!=-1) {
out.write(buf,0, c);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
in.close();
}
}

}
public void unzip(String zipFileName,String dirFileName) throws IOException{
File file=new File(dirFileName);
if(!file.exists()){
file.mkdir();
}
ZipFile zipFile=new ZipFile(zipFileName);
Enumeration en=zipFile.getEntries();
ZipEntry zipEntry=null;
while (en.hasMoreElements()) {
zipEntry= (ZipEntry) en.nextElement();
if(zipEntry.isDirectory()){
String dirName=zipEntry.getName();
dirName=dirName.substring(0,dirName.length()-1);
File f=new File(file.getPath()+File.separator+dirName);
f.mkdir();

}else{
File f=new File(file.getPath()+File.separator+zipEntry.getName());
f.createNewFile();
InputStream in=zipFile.getInputStream(zipEntry);
FileOutputStream out=new FileOutputStream(f);
try {
int c;
byte [] buf=new byte[1024];
while ((c=in.read(buf))!=-1) {
out.write(buf, 0, c);
}
} catch (RuntimeException e) {
e.printStackTrace();
}finally{
in.close();
out.close();
}

}
}
}
public static void main(String[] agrs) throws IOException{
ConpressFile conpressFile=ConpressFile.getInstance();
conpressFile.zip("D:\\unzip","am.zip");
conpressFile.unzip("am.zip","text");
}
}