/**
* 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);
}
}
}
转载于:https://www.cnblogs.com/bilaisheng/p/10210967.html
相关资源：JAVA上百实例源码以及开源项目
