Util--UnzipUtil

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/**
 * 解压缩帮助类
 * 
 * @author chenxin
 * @version [版本号, 2012-5-21]
 * @see [相关类/方法]
 * @since [产品/模块版本]
 */
public class UnzipUtil {

	/**
     * Logger for this class
     */
    private static final Logger logger = Logger.getLogger(UnzipContentHelper.class);
    
    /**
     * 
     * 解开压缩
     * 
     * @param contentNo contentno
     * @param sourcePath 原epub书籍路劲
     * @param targetPath 目标epub书籍路劲 只到保存跟路径
     * @see [类、类#方法、类#成员]
     */
    public void unZip(String contentNo, String sourcePath, String targetPath)
        throws Exception
    {
        
        // 查看资源是否存在
        File resourceFile = new File(sourcePath);
        // 如果资源不存在 就抛出异常
        if (!resourceFile.exists())
        {
            
            throw new Exception("资源 " + resourceFile.getPath() + " 不存在");
            
        }
        
        File targetFileDir = new File(targetPath);
        // 保存目录是否存在
        if (!targetFileDir.exists())
        {
            if (logger.isDebugEnabled())
                logger.debug("!targetFileDir.exists()=" + targetFileDir.getPath());
            
            targetFileDir.mkdir();
        }
        
        // 创建临时目录
        File targetFileDirEpub = new File(targetPath + "/" + contentNo + "_temp");
        if (!targetFileDirEpub.exists())
        {
            if (logger.isDebugEnabled())
                logger.debug(targetFileDirEpub.getPath());
            targetFileDirEpub.mkdir();
        }
        
        // 组装shell脚本
        File file = File.createTempFile("unZip", ".sh");
        write(file, contentNo, sourcePath, targetPath);
        
        // 复制文件
        int retVal = shell("sh " + file.getPath());
        
        // 如果不等于0 表示执行失败
        if (logger.isDebugEnabled())
            logger.debug("retVal=" + retVal);
        if (retVal != 0)
        {
            throw new Exception("脚本执行出错");
        }
        
    }
    
    private int shell(String cmd)
    {
        int retVal = 1;
        if (logger.isInfoEnabled())
            logger.info(cmd);
        try
        {
            Process process = java.lang.Runtime.getRuntime().exec(cmd);
            retVal = process.waitFor();
        }
        catch (Exception e)
        {
            
            e.printStackTrace();
        }
        
        return retVal;
    }
    
    private void write(File file, String contentNo, String sourcePath, String targetPath)
    {
        FileWriter fw = null;
        try
        {
            fw = new FileWriter(file);
            fw.write("cp " + sourcePath + " " + targetPath + "/" + contentNo + "_temp/");
            fw.write("\n");
            
            fw.write("cd " + targetPath + "/" + contentNo + "_temp");
            fw.write("\n");
            
            fw.write("unzip -o -q *.epub");
            fw.write("\n");
            
            fw.write("rm *.epub");
            fw.write("\n");
            
            fw.write("cd ..");
            fw.write("\n");
            
            fw.write("rm -fR " + contentNo);
            fw.write("\n");
            
            fw.write("mv  " + contentNo + "_temp  " + contentNo);
            fw.write("\n");
        }
        catch (IOException e)
        {
            
            e.printStackTrace();
        }
        finally
        {
            
            try
            {
                if (fw != null)
                    fw.close();
            }
            catch (IOException e)
            {
                
                e.printStackTrace();
            }
        }
        
    }
    
    public static void main(String[] args)
    {
        // /data/lgftp/resource/2011/2/22/7a8a51bb-aaad-4f12-8bb1-3a18140fe9a1.epub
        UnzipContentHelper unzip = new UnzipContentHelper();
        try
        {
            unzip.unZip("123124",
                "/data/lgftp/resource/2011/2/22/7a8a51bb-aaad-4f12-8bb1-3a18140fe9a1.epub",
                "/data/lgftp/ebook");
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }


}