使用commons-compress操作zip檔案(壓縮和解壓縮)

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

     Apache Commons Compress是一個壓縮、解壓縮檔案的類庫。

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

　　在這裡寫兩個用Commons Compress把檔案壓縮成zip和從zip解壓縮的方法。

　　直接貼上工具類代碼：

/**
 * Zip檔案工具類
 * @author Luxh
 */
public class ZipFileUtil {
     
    /**
     * 把檔案壓縮成zip格式
     * @param files         需要壓縮的檔案
     * @param zipFilePath 壓縮後的zip檔案路徑   ,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);
                     
                    //将每個檔案用ZipArchiveEntry封裝
                    //再用ZipArchiveOutputStream寫到壓縮檔案中
                    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) {
                                    //把緩沖區的位元組寫入到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檔案解壓到指定的檔案夾
     * @param zipFilePath   zip檔案路徑, 如 "D:/test/aa.zip"
     * @param saveFileDir   解壓後的檔案存放路徑, 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包中的每個檔案讀取出來
                    //然後把檔案寫到指定的檔案夾
                    while((archiveEntry = zais.getNextEntry()) != null) {
                        //擷取檔案名
                        String entryFileName = archiveEntry.getName();
                        //構造解壓出來的檔案存放路徑
                        String entryFilePath = saveFileDir + entryFileName;
                        byte[] content = new byte[(int) archiveEntry.getSize()];
                        zais.read(content);
                        OutputStream os = null;
                        try {
                            //把解壓出來的檔案寫到指定路徑
                            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);
                        }
                }
            }
        }
    }
     
    /**
     * 判斷檔案名是否以.zip為字尾
     * @param fileName        需要判斷的檔案名
     * @return 是zip檔案傳回true,否則傳回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：

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() {
        //存放待壓縮檔案的目錄
        File srcFile = new File("D:/test");
        //壓縮後的zip檔案路徑
        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";
        //解壓後的檔案存放目錄
        String saveFileDir = "d:/test2/";
        //調用解壓方法
        ZipFileUtil.decompressZip(zipFilePath, saveFileDir);
    }
}