Java实现压缩与解压缩

import java.io.*;                                                                       
import java.util.*;                                                                     
import java.util.zip.ZipOutputStream;                                                   
import java.util.zip.ZipEntry;                                                          
import java.util.zip.ZipFile;  

public class ZipUtil {                                                                 
                                                                                       
    /**                                                                                
     * 压缩文件                                                                            
     *                                                                                 
     * @param srcfile File[] 需要压缩的文件列表                                                 
     * @param zipfile File 压缩后的文件                                                      
     */                                                                                
    public static void zipFiles(List<File> srcfile, File zipfile) {                    
        byte[] buf = new byte[1024];                                                   
        try {                                                                          
            // Create the ZIP file                                                     
            ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));
            // Compress the files                                                      
            for (int i = 0; i < srcfile.size(); i++) {                                 
                File file = srcfile.get(i);                                            
                FileInputStream in = new FileInputStream(file);                        
                // Add ZIP entry to output stream. 
                out.putNextEntry(new ZipEntry(file.getName()));                        
                // Transfer bytes from the file to the ZIP file                        
                int len;                                                               
                while ((len = in.read(buf)) > 0) {                                     
                    out.write(buf, 0, len);                                            
                }                                                                      
                // Complete the entry                                                  
                out.closeEntry();                                                      
                in.close();                                                            
            }                                                                          
            // Complete the ZIP file                                                   
            out.close();                                                               
        } catch (IOException e) {                                                      
            e.printStackTrace();                               
        }                                                                              
    }                                                                                  
                                                                                       
    /**                                                                                
     * 解压缩                                                                             
     *                                                                                 
     * @param zipfile File 需要解压缩的文件                                                    
     * @param descDir String 解压后的目标目录                                                  
     */                                                                                
    public static void unZipFiles(File zipfile, String descDir) {                      
        try {                                                                          
            // Open the ZIP file                                                       
            ZipFile zf = new ZipFile(zipfile);                                         
            for (Enumeration entries = zf.entries(); entries.hasMoreElements();) {     
                // Get the entry name                                                  
                ZipEntry entry = ((ZipEntry) entries.nextElement());                   
                String zipEntryName = entry.getName();                                 
                InputStream in = zf.getInputStream(entry);                             
                // System.out.println(zipEntryName);                                   
                OutputStream out = new FileOutputStream(descDir + zipEntryName);       
                byte[] buf1 = new byte[1024];                                          
                int len;                                                               
                while ((len = in.read(buf1)) > 0) {                                    
                    out.write(buf1, 0, len);                                           
                }                                                                      
                // Close the file and stream                                           
                in.close();                                                            
                out.close();                                                           
            }                                                                          
        } catch (IOException e) {
            e.printStackTrace();
        }                                                                              
    } 
    
    public static void main(String[] args){
        List srcfile = new ArrayList();
        srcfile.add(new File("D:/111.xls"));   
        //将文件打包成zip包   
        File zipfile = new File("D:/111.zip");   
        ZipUtil.zipFiles(srcfile, zipfile);
    }
}