Java-UploadHelper工具类

/** * 上传文件类 */import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.FilenameFilter;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;public class UploadHelper {    public final static String separator = "/";    public final static String split = "_";    protected final Log log = LogFactory.getLog(getClass());    class FilenameFilterImpl implements FilenameFilter     {        private String filter = ".";        public FilenameFilterImpl(String aFilter)        {            filter = aFilter;        }        public boolean accept(File dir, String name)         {            return name.startsWith(filter);        }    };    /**     * 获得当前的文件路径（通过当前日期生成）     * @param basePath     * @return     */    public static String getNowFilePath(String basePath){        SimpleDateFormat formater =new SimpleDateFormat("yyyy-MM-dd");        String pathName = formater.format(new Date());        File dir = new File(basePath + separator + pathName);        if(!dir.exists())            dir.mkdir();        return pathName;    }    public static String getNewFileName(String oldFileName){        oldFileName = oldFileName.replaceAll("'", "").replaceAll("\"", "");        Calendar date = Calendar.getInstance();        int hour = date.get(Calendar.HOUR_OF_DAY);        int minute = date.get(Calendar.MINUTE);        int second = date.get(Calendar.SECOND);        if(oldFileName.length()>30)            oldFileName = oldFileName.substring(oldFileName.length()-30);        return (new Integer(hour*3600 + minute*60 + second).toString())                     + split + oldFileName;    }    public static String getThumbFileName(String fileName){        int pos = fileName.lastIndexOf(".");        if(pos>=0)            return fileName.substring(0, pos) + "s" + fileName.substring(pos);        else            return  fileName + "s";    }    /**     * This method checks if the given file exists on disk. If it does it's ignored because     * that means that the file is allready cached on the server. If not we dump     * the text on it.     */    public void dumpAttributeToFile(String attributeValue, String fileName, String filePath) throws Exception    {        File outputFile = new File(filePath + separator + fileName);        PrintWriter pw = new PrintWriter(new FileWriter(outputFile));        pw.println(attributeValue);            pw.close();    }    /**     * 保存文件     * This method checks if the given file exists on disk. If it does it's ignored because     * that means that the file is allready cached on the server. If not we take out the stream from the      * digitalAsset-object and dumps it.     */    public void dumpAsset(File file, String fileName, String filePath) throws Exception    {        long timer = System.currentTimeMillis();        File outputFile = new File(filePath + separator + fileName);        if(outputFile.exists())        {            log.info("The file allready exists so we don't need to dump it again..");            return;        }        FileOutputStream fis = new FileOutputStream(outputFile);        BufferedOutputStream bos = new BufferedOutputStream(fis);        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));        int character;        while ((character = bis.read()) != -1)        {            bos.write(character);        }        bos.flush();        bis.close();        fis.close();        bos.close();        log.info("Time for dumping file " + fileName + ":" + (System.currentTimeMillis() - timer));    }    /**     * 保存缩略图     * This method checks if the given file exists on disk. If it does it's ignored because     * that means that the file is allready cached on the server. If not we take out the stream from the      * digitalAsset-object and dumps a thumbnail to it.     */    public void dumpAssetThumbnail(File file, String fileName, String thumbnailFile, String filePath, int width, int height, int quality) throws Exception    {        long timer = System.currentTimeMillis();        log.info("fileName:" + fileName);        log.info("thumbnailFile:" + thumbnailFile);        File outputFile = new File(filePath + separator + thumbnailFile);        if(outputFile.exists())        {            log.info("The file allready exists so we don't need to dump it again..");            return;        }        ThumbnailGenerator tg = new ThumbnailGenerator();        tg.transform(filePath + separator + fileName, filePath + separator + thumbnailFile, width, height, quality);        log.info("Time for dumping file " + fileName + ":" + (System.currentTimeMillis() - timer));    }    /**     * This method removes all images in the digitalAsset directory which belongs to a certain digital asset.     */    public void deleteDigitalAssets(String filePath, String filePrefix) throws Exception    {         try        {            File assetDirectory = new File(filePath);            File[] files = assetDirectory.listFiles(new FilenameFilterImpl(filePrefix));                for(int i=0; i<files.length; i++)            {                File file = files[i];                log.info("Deleting file " + file.getPath());                file.delete();            }        }        catch(Exception e)        {            log.error("Could not delete the assets for the digitalAsset " + filePrefix + ":" + e.getMessage(), e);        }    }}