Jsf 流式传输动态资源时出错。使用带素数面的p:graphicImage
我尝试使用p:graphicImage标记在primefaces中动态显示图像,如下所示:Jsf 流式传输动态资源时出错。使用带素数面的p:graphicImage,jsf,primefaces,Jsf,Primefaces,我尝试使用p:graphicImage标记在primefaces中动态显示图像,如下所示: <p:graphicImage value="#{submissionBean.contestImage}"> <f:param name="imageName" value="#{contestBean.createContest.submissions[0].fileName}" /> </p:graphicImage>` @Managed
<p:graphicImage value="#{submissionBean.contestImage}">
<f:param name="imageName"
value="#{contestBean.createContest.submissions[0].fileName}" />
</p:graphicImage>`
@ManagedProperty("#{param.imageName}")
private String imageName;
public String getImageName()
{
return imageName;
}
public void setImageName(String imageName)
{
this.imageName = imageName;
}
private StreamedContent contestImage;
public StreamedContent getContestImage()
{
FacesContext context = FacesContext.getCurrentInstance();
if (imageName == null)
imageName = Constants.SUBMISSION_FILE_DIR + "/" + "sacxzx_asdsdaas_icon.png";
if (context.getRenderResponse())
{
// So, we're rendering the view. Return a stub StreamedContent so
// that it will generate right URL.
return new DefaultStreamedContent();
}
else
{
return new DefaultStreamedContent(this.getClass().getResourceAsStream(Constants.SUBMISSION_FILE_DIR + "/" + imageName));
}
}
我总是收到“严重:流式动态资源错误”的错误
检查图像的URL似乎很好:
http://localhost:8080/mashup/javax.faces.resource/dynamiccontent.xhtml?ln=primefaces&pfdrid=pfdrid_4290aa0c-8eef-45ea-a281-638e460e33bf&imageName=sacxzx_asdsdaas_icon.png
知道为什么吗
谢谢 应该是
会话范围
。由于在页面处理过程中多次调用方法getContesticImage()
,因此最好只创建一次流。托管bean的作用域是什么?