package com.wy.tool;

import java.io.*;
import java.util.Date;
import org.apache.struts.upload.FormFile;

public class UploadFile {
	public String upload(String dir, FormFile formFile) throws Exception {
		Date date = new Date();
		// 取欲上傳的文件的名字和長度
		String fname = formFile.getFileName();
		// 將上傳時間加入文件名
		int i = fname.indexOf(".");
		String name = String.valueOf(date.getTime());
		String type = fname.substring(i + 1);
		fname = name + "." + type;
		InputStream streamIn = formFile.getInputStream(); // 創建讀取用戶上傳文件的對象
		File uploadFile = new File(dir); // 創建把上傳數據寫到目標文件的對象
		if (!uploadFile.exists() || uploadFile == null) { // 判斷指定路徑是否存在，不存在則創建路徑
			uploadFile.mkdirs();
		}
		String path = uploadFile.getPath() + "/" + fname;
		OutputStream streamOut = new FileOutputStream(path);
		int bytesRead = 0;
		byte[] buffer = new byte[8192];
		while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
			streamOut.write(buffer, 0, bytesRead);
		}
		streamOut.close();
		streamIn.close();
		formFile.destroy();
		return fname;
	}
}