http://www.cnblogs.com/luxh/archive/2012/06/28/2568758.html

Apache Commons Compress是一個壓縮、解壓縮文件的類庫。

　　可以操作ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200 and bzip2格式的文件，功能比較強大。

　　在這裏寫兩個用Commons Compress把文件壓縮成zip和從zip解壓縮的方法。

　　直接貼上工具類代碼：

/** 
 * Zip文件工具類 
 * @author Luxh 
 */  
public class ZipFileUtil {  
       
    
 
/** 
     * 把文件壓縮成zip格式 
     * @param files         需要壓縮的文件 
     * @param zipFilePath 壓縮後的zip文件路徑   ,如"D:/test/aa.zip"; 
     */  
    public static void compressFiles2Zip(File[] files,String zipFilePath) {  
        if(files != null && files.length >0) {  
            if(isEndsWithZip(zipFilePath)) {  
                ZipArchiveOutputStream zaos 
 
= null;  
                try {  
                    File zipFile = new File(zipFilePath);  
                    zaos = new ZipArchiveOutputStream(zipFile);  
                    //Use Zip64 extensions for all entries where they are required  
                    zaos.setUseZip64(Zip64Mode.AsNeeded);  
                       
                    
 
//將每個文件用ZipArchiveEntry封裝  
                    //再用ZipArchiveOutputStream寫到壓縮文件中  
                    for(File file : files) {  
                        if(file != null) {  
                            ZipArchiveEntry zipArchiveEntry  = new ZipArchiveEntry(file,file.getName());  
                            zaos.putArchiveEntry(zipArchiveEntry);  
                            InputStream is = null;  
                            try {  
                                is = new BufferedInputStream(new FileInputStream(file));  
                                byte[] buffer = new byte[1024 * 5];    
                                int len = -1;  
                                while((len = is.read(buffer)) != -1) {  
                                    //把緩沖區的字節寫入到ZipArchiveEntry  
                                    zaos.write(buffer, 0, len);  
                                }  
                                //Writes all necessary data for this entry.  
                                zaos.closeArchiveEntry();    
                            }catch(Exception e) {  
                                throw new RuntimeException(e);  
                            }finally {  
                                if(is != null)   
                                    is.close();  
                            }  
                               
                        }  
                    }  
                    zaos.finish();  
                }catch(Exception e){  
                    throw new RuntimeException(e);  
                }finally {  
                        try {  
                            if(zaos != null) {  
                                zaos.close();  
                            }  
                        } catch (IOException e) {  
                            throw new RuntimeException(e);  
                        }  
                }  
                   
            }  
               
        }  
           
    }  
       
    /** 
     * 把zip文件解壓到指定的文件夾 
     * @param zipFilePath   zip文件路徑, 如 "D:/test/aa.zip" 
     * @param saveFileDir   解壓後的文件存放路徑, 如"D:/test/" 
     */  
    public static void decompressZip(String zipFilePath,String saveFileDir) {  
        if(isEndsWithZip(zipFilePath)) {  
            File file = new File(zipFilePath);  
            if(file.exists()) {  
                InputStream is = null;  
                //can read Zip archives  
                ZipArchiveInputStream zais = null;  
                try {  
                    is = new FileInputStream(file);  
                    zais = new ZipArchiveInputStream(is);  
                    ArchiveEntry  archiveEntry = null;  
                    //把zip包中的每個文件讀取出來  
                    //然後把文件寫到指定的文件夾  
                    while((archiveEntry = zais.getNextEntry()) != null) {  
                        //獲取文件名  
                        String entryFileName = archiveEntry.getName();  
                        //構造解壓出來的文件存放路徑  
                        String entryFilePath = saveFileDir + entryFileName;  
                        byte[] content = new byte[(int) archiveEntry.getSize()];  
                        zais.read(content);  
                        OutputStream os = null;  
                        try {  
                            //把解壓出來的文件寫到指定路徑  
                            File entryFile = new File(entryFilePath);  
                            os = new BufferedOutputStream(new FileOutputStream(entryFile));  
                            os.write(content);  
                        }catch(IOException e) {  
                            throw new IOException(e);  
                        }finally {  
                            if(os != null) {  
                                os.flush();  
                                os.close();  
                            }  
                        }  
                           
                    }  
                }catch(Exception e) {  
                    throw new RuntimeException(e);  
                }finally {  
                        try {  
                            if(zais != null) {  
                                zais.close();  
                            }  
                            if(is != null) {  
                                is.close();  
                            }  
                        } catch (IOException e) {  
                            throw new RuntimeException(e);  
                        }  
                }  
            }  
        }  
    }  
       
    /** 
     * 判斷文件名是否以.zip為後綴 
     * @param fileName        需要判斷的文件名 
     * @return 是zip文件返回true,否則返回false 
     */  
    public static boolean isEndsWithZip(String fileName) {  
        boolean flag = false;  
        if(fileName != null && !"".equals(fileName.trim())) {  
            if(fileName.endsWith(".ZIP")||fileName.endsWith(".zip")){  
                flag = true;  
            }  
        }  
        return flag;  
    }  
       
}  

測試代碼：
[java] view plain copy print?
package cn.luxh.test;  
   
import java.io.File;  
   
import org.junit.Test;  
   
import cn.luxh.utils.ZipFileUtil;  
   
/** 
 * 測試ZipFileUtil的壓縮和解壓縮方法 
 * @author Luxh 
 */  
public class ZipFileUtilTest {  
       
    @Test  
    public void testCompressFiles2Zip() {  
        //存放待壓縮文件的目錄  
        File srcFile = new File("D:/test");  
        //壓縮後的zip文件路徑  
        String zipFilePath = "d:/test2/test.zip";  
        if(srcFile.exists()) {  
            File[] files = srcFile.listFiles();  
            ZipFileUtil.compressFiles2Zip(files, zipFilePath);  
        }  
    }  
       
    @Test  
    public void testDecompressZip()  {  
        //壓縮包所在路徑  
        String zipFilePath = "d:/test2/test.zip";  
        //解壓後的文件存放目錄  
        String saveFileDir = "d:/test2/";  
        //調用解壓方法  
        ZipFileUtil.decompressZip(zipFilePath, saveFileDir);  
    }  
}  

使用commons-compress操作zip文件(壓縮和解壓縮)