Java 압축 파일이 왜곡되는 문제

package com.compress;  
  
import java.io.BufferedInputStream;  
import java.io.BufferedOutputStream;  
import java.io.DataInputStream;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
  
import org.apache.tools.zip.ZipEntry;  
import org.apache.tools.zip.ZipOutputStream;  
  
public class CompressEncodingTest {  
  
    /** 
     * @param args 
     * @throws Exception 
     */  
    public static void main(String[] args) throws Exception {  
        File f = new File("中文测试.txt");  
        ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(  
                new FileOutputStream("zipTest.zip"), 1024));  
        zos.putNextEntry(new ZipEntry("中国人.txt"));  
        DataInputStream dis = new DataInputStream(new BufferedInputStream(  
                new FileInputStream(f)));  
        zos.putNextEntry(new ZipEntry(f.getName()));  
        int c;  
        while ((c = dis.read()) != -1) {  
            zos.write(c);  
        }  
  
        zos.setEncoding("gbk");  
        zos.setComment("中文测试");  
  
        zos.closeEntry();  
        zos.close();  
    }  
  
}