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我在尝试使用 jsf 2.0 渲染.png 图像时遇到问题，因为 JPG 可以正常工作

h:graphicImage library="img" name="logo.png" --> 不行，空指针如下图

h:graphicImage library="img" name="logo.jpg --> 没问题

更新 我从 Chrome 开发人员工具控制台资源中看到以下内容解释为 Image 但使用 MIME 类型 text/html 传输

不确定是否需要在 web.xml 中设置内容类型

资源结构

网页内容/资源/img/logo.png

ErrorPageWrit E   An exception occurred
                                 java.lang.NullPointerException
        at com.ibm.ws.webcontainer.srt.SRTServletResponse.setContentType(SRTServletResponse.java:1345)
        at org.apache.myfaces.application.ResourceHandlerImpl.handleResourceRequest(ResourceHandlerImpl.java:333)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:183)
        at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1657)
        at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:939)
        at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:502)
        at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:179)
        at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3935)
        at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276)
        at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:931)
        at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1583)
        at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:186)
        at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:452)
        at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:511)
        at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:305)
        at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:276)
        at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
        at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
        at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
        at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
        at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
        at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
        at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
        at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
        at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
        at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1604)
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1 回答 1

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解决。

似乎是 mime 映射的问题。由于某种原因，服务器无法识别 png。在 web.xml 中为 png 添加了 mime 映射

使用 MyFaces 实现，WAS7。

相关帖子： http: //forum.primefaces.org/viewtopic.php?f=9 &t=19880 。

于 2013-03-07T22:03:06.097 回答