帮助从Servlet到JSP页面获取图像 [英] Help getting image from Servlet to JSP page

问题描述

我目前必须生成一个显示字符串文本的图像，我需要在Servlet上创建这个图像，然后以某种方式将图像传递给JSP页面，以便它可以显示它。我试图避免保存图像，而是以某种方式将图像流式传输到JSP。

I currently have to generate an image that displays the text of a string, i need to make this image on a Servlet and then somehow pass the image to a JSP page so that it can display it. I'm trying to avoid saving the image, and instead somehow stream the image to the JSP.

自从我开始以来，我还没有找到生成图像的方法找到如何将图像从Servlet传递到JSP adn卡住了。

I haven't found a way of generating the image since i started with finding how to pass an image from the Servlet to the JSP adn got stuck.

编辑：
jsp页面已经制作完成并且不是由servlet，我必须将图像传递给已经存在的jsp

The jsp page is already made and isn't created by the servlet, i have to pass the image into an already existing jsp

任何帮助都表示赞赏。

推荐答案

您需要将图像作为字节数组写入响应的输出流。这样的事情：

You need to write the image as a byte array to the response's output stream. Something like this:

byte[] imageBytes = getImageAsBytes();

response.setContentType("image/jpeg");
response.setContentLength(imageBytes.length);

response.getOutputStream().write(imageBytes);

然后在JSP中你只需使用标准的 img 元素：

Then in you JSP you just use a standard img element:

<img src="url to your servlet">

这篇关于帮助从Servlet到JSP页面获取图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！