无法显示来自本地主机的图像 [英] Can't display images from localhost

问题描述

我不明白为什么在我的 webAPP 中，当我尝试通过执行此操作加载图标时:

I dont understand why in my webAPP When I try to load an Icon by doing this for exemple :

ImageIcon rtfIcon = new ImageIcon("http://localhost:8080/app/images/rtf.gif"); 

rtfIcon.getImageLoadStatus() 返回错误值.

the rtfIcon.getImageLoadStatus() returns an ERRORED value .

但在我的网络浏览器中它正确显示 http://localhost:8080/app/images/rtf.gif .我不明白.我使用 apache tomcat .是否有任何选项配置要做或者是简单的编码错误?

But in my web browser it displays properly http://localhost:8080/app/images/rtf.gif . I dont get it . I use apache tomcat . Is there any option configuration to do or it's simple coding mistake ?

提前致谢.

推荐答案

ImageIcon rtfIcon = new ImageIcon("http://localhost:8080/app/images/rtf.gif"); 

假定 String 指的是 File. 改为使用..

Presumes the String refers to a File. Use instead..

ImageIcon rtfIcon = new ImageIcon(
    new URL("http://localhost:8080/app/images/rtf.gif"));

..或者，考虑到 BalusC 的建议..

..or, taking into account the advice from BalusC..

只要网络服务器在物理上不同的机器上运行(在生产中)，小程序就会无法工作.而是使用 getCodeBase() 来获取到提供小程序的主机的 URL然后在此基础上进一步发展."

"The applet will fail to work whenever the webserver runs at a physically different machine (in production). Rather use getCodeBase() to get the URL to the host where the applet is been served from and then build further on that."

ImageIcon rtfIcon = new ImageIcon(
    new URL(getCodeBase(), "/app/images/rtf.gif"));

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