I need to diplay blob type image data in java web page which is use primefaces. but it won't diplay image but display icon of a image. Glassfish server out put get nullpoint exception with some errors
我需要在使用primefaces的java网页中显示blob类型的图像数据。但它不会显示图像,而是显示图像的图标。 Glassfish服务器输出get nullpoint异常,但有一些错误
Server output =
服务器输出=
WARNING: Setting non-serializable attribute value into ViewMap: (key: phonesBean, value class: bean.PhonesBean)
SEVERE: Error in streaming dynamic resource. null
SEVERE: Error in streaming dynamic resource. null
SEVERE: java.lang.NullPointerException
at org.primefaces.application.PrimeResourceHandler.handleResourceRequest(PrimeResourceHandler.java:67)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:591)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
SEVERE: at org.primefaces.application.PrimeResourceHandler.handleResourceRequest(PrimeResourceHandler.java:67)
SEVERE: at javax.faces.webapp.FacesServlet.service(FacesServlet.java:591)
SEVERE: at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
SEVERE: at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
SEVERE: at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
SEVERE: at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
SEVERE: at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
SEVERE: at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
SEVERE: at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
SEVERE: at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
SEVERE: at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
SEVERE: at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
SEVERE: at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
SEVERE: at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
SEVERE: at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
SEVERE: at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
SEVERE: at java.lang.Thread.run(Thread.java:722)
SEVERE: java.lang.NullPointerException
at org.primefaces.application.PrimeResourceHandler.handleResourceRequest(PrimeResourceHandler.java:67)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:591)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
SEVERE: at org.primefaces.application.PrimeResourceHandler.handleResourceRequest(PrimeResourceHandler.java:67)
SEVERE: at javax.faces.webapp.FacesServlet.service(FacesServlet.java:591)
SEVERE: at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
SEVERE: at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
SEVERE: at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
SEVERE: at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
SEVERE: at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
SEVERE: at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
SEVERE: at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
SEVERE: at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
SEVERE: at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
SEVERE: at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
SEVERE: at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
SEVERE: at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
SEVERE: at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
SEVERE: at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
SEVERE: at java.lang.Thread.run(Thread.java:722)
HTML =
<p:dataGrid var="phone" value="#{phonesBean.phoneList}" columns="8"
rows="12" paginator="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="9,12,15" style="text-align: center;">
<p:panel header="#{phone.model}" style="text-align:center;width: 100px">
<h:panelGrid columns="1" style="width:100%">
<p:graphicImage value="#{phone.image}"/>
</h:panelGrid>
java code =
java code =
private void blobToStreamedContentConvertor(){
try{
Blob imageBlob1 = new SerialBlob(imageBlob);
InputStream stream = imageBlob1.getBinaryStream();
image = new DefaultStreamedContent(stream, "image/jpg");
createImageValue();
}
catch(Exception e){
System.err.println("e = "+e);
}
}
private void createImageValue(){
// FacesContext context = FacesContext.getCurrentInstance();
// imageValue = context.getExternalContext().getRequestParameterMap().get("id");
imageValue = String.valueOf(image);
}
Note - After quering the DB for images image take toa blob type variable...
注意 - 查询数据库图像后,获取blob类型变量...
2 个解决方案
#1
0
There seems to be a bug in primefaces, see this and this.
在primefaces中似乎有一个bug,看到这个和这个。
You could try to change the scope of your bean from @ViewScoped to @SessionScoped. If that doesn't help, or is not an option then I suggest you post this on the primefaces forum or google code.
您可以尝试将bean的范围从@ViewScoped更改为@SessionScoped。如果这没有帮助,或者不是一个选项,那么我建议你在primefaces论坛或谷歌代码上发布。
#2
0
The EL used in your JSF page is used to retrieve the image when the browser asks for it. But the El contains the row var of the table. In your case shortcutDetails.imageContent isn't known outside the table. If you try to retrieve an object singularly and display the image it will work perfectly but inside a loop it will not.
您的JSF页面中使用的EL用于在浏览器请求时检索图像。但是El包含表的行var。在您的情况下,在表外不知道shortcutDetails.imageContent。如果你尝试单独检索一个对象并显示图像它将完美地工作但在循环内它不会。
Below you can find a solution for this kind of problem:
您可以在下面找到解决此类问题的方法:
http://jsfcorner.blogspot.be/2012/11/advanced-primefaces-graphic-image.html
Hope it works well for you!
希望它适合你!
#1
0
There seems to be a bug in primefaces, see this and this.
在primefaces中似乎有一个bug,看到这个和这个。
You could try to change the scope of your bean from @ViewScoped to @SessionScoped. If that doesn't help, or is not an option then I suggest you post this on the primefaces forum or google code.
您可以尝试将bean的范围从@ViewScoped更改为@SessionScoped。如果这没有帮助,或者不是一个选项,那么我建议你在primefaces论坛或谷歌代码上发布。
#2
0
The EL used in your JSF page is used to retrieve the image when the browser asks for it. But the El contains the row var of the table. In your case shortcutDetails.imageContent isn't known outside the table. If you try to retrieve an object singularly and display the image it will work perfectly but inside a loop it will not.
您的JSF页面中使用的EL用于在浏览器请求时检索图像。但是El包含表的行var。在您的情况下,在表外不知道shortcutDetails.imageContent。如果你尝试单独检索一个对象并显示图像它将完美地工作但在循环内它不会。
Below you can find a solution for this kind of problem:
您可以在下面找到解决此类问题的方法:
http://jsfcorner.blogspot.be/2012/11/advanced-primefaces-graphic-image.html
Hope it works well for you!
希望它适合你!