問題：java.io.FileNotFoundException: D:\tempfile (拒絕訪問。)at java.io.FileOutputStream.open(Native Method)at java.io.FileOutputStream.(FileOutputStream.java:221)at java.io.FileOutputStream.(FileOutputStream.java:171)at com.sh.xy.servlet.UploadServlet.doPost(UploadServlet.java:55)at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)...

解決辦法：在填寫檔案的路徑時一定要具體到檔案

原始碼：

public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		System.out.println("已經接收到請求");
		
		//從request當中獲取流資訊
		InputStream fileSource = request.getInputStream();
		String tempFileName = "D:/tempfile.png";
		
		//tempFile指向臨時檔案
		File tempFile = new File(tempFileName);

		//outputStream檔案輸出流指向這個臨時檔案
		FileOutputStream outputStream = new FileOutputStream(tempFile);
		byte  b[] = new byte[1024];
		int n;
		while((n=fileSource.read(b)) != -1){
			outputStream.write(b, 0, n);
		}
		
		//關閉輸入輸出流
		outputStream.close();
		fileSource.close();
	}

}