/**
* 上传文件，名称以日期命名
*
* @author Administrator
*/
public class UploadUtil {
/**
* 上传文件
*
* @param src
* 源文件
* @param dst
* 目标文件
* @param BUFFER_SIZE
* 缓冲大小
*/
public static void copy(File src, File dst, final int BUFFER_SIZE) {
try {
InputStream in = null;
OutputStream out = null;
try {
in = new BufferedInputStream(new FileInputStream(src));
dst = rename(dst);
out = new BufferedOutputStream(new FileOutputStream(dst));
int word = 0;
while ((word = in.read()) != -1) {
out.write(word);
}
} finally {
if (null != in) {
in.close();
}
if (null != out) {
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 得到扩展名
* @param fileName
* @return
*/
public static String getExt(String fileName) {
int pos = fileName.lastIndexOf(".");
return fileName.substring(pos);
}
/**
* 更改上传文件名
* @param file 文件对象
* @return 更名后的文件对象
*/
public static File rename(File file) {
String fileName = "";// 文件名
String extName = "";// 文件扩展名
Calendar cal = Calendar.getInstance();
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");
fileName = formatter.format(cal.getTime()) + (int) (Math.random() * 10);
extName = getExt(file.getName());
String newName = fileName + "." + extName;
file = new File(file.getParent(), newName);
return file;
}
}