Java對Zip文件的支持不是很強大斯辰，有一些需要自己實現(xiàn)的代碼，我在網(wǎng)上找了很多代碼坡疼，都不能用于生產(chǎn)彬呻，要不就是流沒有被關(guān)閉，要不就是Exception處理很隨意回梧，下面是我修改過并測試過的代碼能用于生產(chǎn)的壓縮和解壓縮的代碼废岂，做一個代碼備份。

使用遞歸算法將一個文件夾壓縮成Zip文件：

static final int BUFFER = 8192;

public static void compress(String srcPath , String dstPath) throws IOException{
    File srcFile = new File(srcPath);
    File dstFile = new File(dstPath);
    if (!srcFile.exists()) {
        throw new FileNotFoundException(srcPath + "不存在狱意！");
    }

    FileOutputStream out = null;
    ZipOutputStream zipOut = null;
    try {
        out = new FileOutputStream(dstFile);
        CheckedOutputStream cos = new CheckedOutputStream(out,new CRC32());
        zipOut = new ZipOutputStream(cos);
        String baseDir = "";
        compress(srcFile, zipOut, baseDir);
    }
    finally {
        if(null != zipOut){
            zipOut.close();
            out = null;
        }

        if(null != out){
            out.close();
        }
    }
}

private static void compress(File file, ZipOutputStream zipOut, String baseDir) throws IOException{
    if (file.isDirectory()) {
        compressDirectory(file, zipOut, baseDir);
    } else {
        compressFile(file, zipOut, baseDir);
    }
}

/** 壓縮一個目錄 */
private static void compressDirectory(File dir, ZipOutputStream zipOut, String baseDir) throws IOException{
    File[] files = dir.listFiles();
    for (int i = 0; i < files.length; i++) {
        compress(files[i], zipOut, baseDir + dir.getName() + "/");
    }
}

/** 壓縮一個文件 */
private static void compressFile(File file, ZipOutputStream zipOut, String baseDir)  throws IOException{
    if (!file.exists()){
        return;
    }

    BufferedInputStream bis = null;
    try {
        bis = new BufferedInputStream(new FileInputStream(file));
        ZipEntry entry = new ZipEntry(baseDir + file.getName());
        zipOut.putNextEntry(entry);
        int count;
        byte data[] = new byte[BUFFER];
        while ((count = bis.read(data, 0, BUFFER)) != -1) {
            zipOut.write(data, 0, count);
        }

    }finally {
        if(null != bis){
            bis.close();
        }
    }
}

將Zip文件加壓縮出來湖苞，包含所有文件和文件夾到目標目錄：

public static void decompress(String zipFile , String dstPath)throws IOException{
    File pathFile = new File(dstPath);
    if(!pathFile.exists()){
        pathFile.mkdirs();
    }
    ZipFile zip = new ZipFile(zipFile);
    for(Enumeration entries = zip.entries();entries.hasMoreElements();){
        ZipEntry entry = (ZipEntry)entries.nextElement();
        String zipEntryName = entry.getName();
        InputStream in = null;
        OutputStream out = null;
        try{
            in =  zip.getInputStream(entry);
            String outPath = (dstPath+"/"+zipEntryName).replaceAll("\\*", "/");;
            //判斷路徑是否存在,不存在則創(chuàng)建文件路徑
            File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
            if(!file.exists()){
                file.mkdirs();
            }
            //判斷文件全路徑是否為文件夾,如果是上面已經(jīng)上傳,不需要解壓
            if(new File(outPath).isDirectory()){
                continue;
            }

            out = new FileOutputStream(outPath);
            byte[] buf1 = new byte[1024];
            int len;
            while((len=in.read(buf1))>0){
                out.write(buf1,0,len);
            }
        }
        finally {
            if(null != in){
                in.close();
            }

            if(null != out){
                out.close();
            }
       }
    }
    zip.close();
}

調(diào)用示例：

public static void main(String[] args)throws Exception{
    String targetFolderPath = "/Users/fred/zipFile/zipFolder";
    String rawZipFilePath = "/Users/fred/zipFile/raw.zip";
    String newZipFilePath = "/Users/fred/zipFile/new.zip";

    //將Zip文件解壓縮到目標目錄
    CompressUtil.decompress(rawZipFilePath , targetFolderPath);

    //將目標目錄的文件壓縮成Zip文件
    CompressUtil.compress(targetFolderPath , newZipFilePath);

}