zipUtil(zip打包工具类)

说明：
1.平时做zip打包主要用到了java.util.zip下的ZipOutputStream、ZipEntry两个API
如需了解这两个API怎么用，请自行查阅文档。
2.以下方法已经经过测试，可直接copy使用，如有不足之处请指出。谢谢！

/**
 * 压缩文件列表到某个zip包
 * @param zipFileName zip包文件名
 * @param paths 文件列表路径
 * @throws IOException
 */ 
public static void compress(String zipFileName,String... paths) throws IOException {
    compress(new FileOutputStream(zipFileName),paths);
}


/**
 * 压缩文件列表到某个zip包
 * @param stream 流
 * @param paths 文件列表路径
 * @throws IOException
 */
public static void compress(OutputStream stream,String... paths) throws IOException {
    ZipOutputStream zos = new ZipOutputStream(stream);
    for (String path : paths){
        if (StringUtils.equals(path,"")){
            continue;
        }
        File file = new File(path);
        if (file.exists()){
            if (file.isDirectory()){
                zipDirectory(zos,file.getPath(),file.getName() + File.separator);
            } else {
                zipFile(zos,file.getPath(),"");
            }
        }
    }
    zos.close();
}


/**
 * 解析多文件夹
 * @param zos zip流
 * @param dirName 目录名称
 * @param basePath
 * @throws IOException
 */
private static void zipDirectory(ZipOutputStream zos,String dirName,String basePath) throws IOException {
    File dir = new File(dirName);
    if (dir.exists()){
        File files[] = dir.listFiles();
        if (files.length > 0){
            for (File file : files){
                if (file.isDirectory()){
                    zipDirectory(zos,file.getPath(),file.getName() + File.separator);
                } else {
                    zipFile(zos,file.getName(),basePath);
                }
            }
        } else {
            ZipEntry zipEntry = new ZipEntry(basePath);
            zos.putNextEntry(zipEntry);
        }
    }
}


private static void zipFile(ZipOutputStream zos,String fileName,String basePath) throws IOException {
    File file = new File(fileName);
    if (file.exists()){
        FileInputStream fis = new FileInputStream(fileName);
        ZipEntry ze = new ZipEntry(basePath + file.getName());
        zos.putNextEntry(ze);
        byte[] buffer = new byte[8192];
        int count = 0;
        while ((count = fis.read(buffer)) > 0){
            zos.write(buffer,0,count);
        }
        fis.close();
    }
}