java压缩文件工具类

今天弄里一个压缩文件的工具类，功能不是很完善，只支持压缩后单级目录，二级文件夹的文件名好像只能用中文，并且解压后还是乱码。请各位高手大侠批评指教，不胜感激!

package tests;  
 
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.util.zip.ZipEntry;  
import java.util.zip.ZipOutputStream;  
 
public class ZipUtil {  
    private static File zip;  
    private static ZipOutputStream zipOut;  
    private InputStream input;  
    public ZipUtil(){  
        try {  
            zipOut = new ZipOutputStream(new FileOutputStream(zip));  
            zipOut.setComment("hello2");  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        }  
    }  
    public void zipFile(File file) {  
        if (file.isDirectory()) {  
            File[] files = file.listFiles();  
            for (int i = 0; i < files.length; i++) {  
                if (files[i].isDirectory()) {  
                    zipFile(files[i]);  
                } else {  
                    try {  
                        input = new FileInputStream(files[i]);  
                        zipOut.putNextEntry(new ZipEntry(file.getName()  
                                + File.separator + files[i].getName()));  
                        int temp = 0;  
                        while ((temp = input.read()) != -1) {  
                            zipOut.write(temp);  
                        }  
                        input.close();  
                    } catch (FileNotFoundException e) {  
                        e.printStackTrace();  
                    } catch (IOException e) {  
                        e.printStackTrace();  
                    }  
                }  
            }  
            try {  
                zipOut.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        } else {  
            try {  
                input = new FileInputStream(file);  
                zipOut.putNextEntry(new ZipEntry(file.getName()));  
                int temp = 0;  
                while ((temp = input.read()) != -1) {  
                    zipOut.write(temp);  
                }  
                input.close();  
                zipOut.close();  
            } catch (FileNotFoundException e) {  
                e.printStackTrace();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
    }  
    public static void main(String[] args) {  
        zip = new File("d:" + File.separator + "hello.rar");  
        File file = new File("d:" + File.separator + "hello");  
        new ZipUtil().zipFile(file);  
    }  
}