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图像从servlet以jsp显示

[英]images display in jsp from servlet

I have uploaded images to server machine folder like c:images. 我已将图像上传到服务器计算机文件夹,例如c:images。 for this i have written "web.xml" <context-param> <description>Location to display uploaded file</description> <param-name>file-display</param-name> <param-value> C:/images/ </param-value> </context-param> 为此,我编写了“ web.xml”。 <context-param> <description>Location to display uploaded file</description> <param-name>file-display</param-name> <param-value> C:/images/ </param-value> </context-param>

it is uploading perfectly well. 上传非常好。 Now i need to display those images in a jsp with <img src=""/> tag. 现在,我需要使用<img src=""/>标签在jsp中显示这些图像。

i am finding the path using 我正在寻找使用的路径

filepath =  getServletContext().getInitParameter("file-display"); 

in servlet and also attached image name. 在servlet中,并附加了图像名称。 but how to represent in jsp with" <img src=""/> " tag. 但是如何用“ <img src=""/> ”标签在jsp中表示。 is there another way to diplay images in jsp from server location folder. 还有另一种方法可以从服务器位置文件夹中显示jsp中的图像。

You should be able to access the ServletContext in jsp using the predefined application variable: 您应该能够使用预定义的application变量在jsp中访问ServletContext

application.getInitParameter("file-display");

If you are using Servlet API 3.0 (for EL 2.2, which supports calling methods in expressions) you can do: 如果您使用的是Servlet API 3.0(用于EL 2.2,它支持表达式中的调用方法),则可以执行以下操作:

${application.getInitParameter("file-display")}

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