PrimeFaces p：fileUpload不调用方法 [英] PrimeFaces p:fileUpload does not invoke method
本文介绍了PrimeFaces p：fileUpload不调用方法的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图使用PrimeFaces < p：fileUpload> 。我已经安装了，与展示示例非常相似，但它确实不行。我从来没有得到成功的消息。我没有任何错误或任何东西。
这是我的 web.xml ：
<？xml version =1.0encoding =UTF-8？>
< web-app version =3.0xmlns =http://java.sun.com/xml/ns/javaeexmlns：xsi =http://www.w3.org/2001/ XMLSchema-instancexsi：schemaLocation =http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd\">
< context-param>
< param-name> javax.faces.PROJECT_STAGE< / param-name>
<参数值>开发< /参数值>
< / context-param>
< servlet>
< servlet-name> Faces Servlet< / servlet-name>
< servlet-class> javax.faces.webapp.FacesServlet< / servlet-class>
<加载启动> 1< /加载启动>
< / servlet>
< servlet-mapping>
< servlet-name> Faces Servlet< / servlet-name>
< url-pattern> / faces / *< / url-pattern>
< / servlet-mapping>
< filter>
< filter-name> PrimeFaces FileUpload Filter< / filter-name>
< filter-class> org.primefaces.webapp.filter.FileUploadFilter< / filter-class>
< init-param>
< param-name> thresholdSize< / param-name>
<参数值> 51200< /参数值>
< / init-param>
< init-param>
< param-name> uploadDirectory< / param-name>
< param-value> C：\ etc< / param-value>
< / init-param>
< / filter>
< filter-mapping>
< filter-name> PrimeFaces FileUpload Filter< / filter-name>
< servlet-name> Faces Servlet< / servlet-name>
< / filter-mapping>
< session-config>
< session-timeout>
30
< / session-timeout>
< / session-config>
< welcome-file-list>
< welcome-file> faces / index.xhtml< / welcome-file>
< / welcome-file-list>
< / web-app>
以下是视图：
<？xml version ='1.0'encoding ='UTF-8'？>
<！DOCTYPE html PUBLIC - // W3C // DTD XHTML 1.0 Transitional // ENhttp://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
xmlns：h =http://java.sun.com/jsf/html
xmlns：f =http://java.sun.com/jsf/core
xmlns：p =http://primefaces.org/ui>
< h：head>< / h：head>
< h：form enctype =multipart / form-data>
< p：fileUpload fileUploadListener =＃{fileUploadController.handleFileUpload}
mode =advanced
update =messages
sizeLimit =100000
allowTypes = /（\ | \ /。）（GIF | JPE G | PNG？）$ //>
< p：growl id =messagesshowDetail =true/>
< / h：表格>
< / html>
< / h：表格>
< / h：body>
以下是bean：
package fileUpload;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import org.primefaces.event.FileUploadEvent;
$ b @ManagedBean（name =fileUploadController）
public class fileUploadController {
$ b $ private String destination =c：\ test;
$ b $ public void upload（FileUploadEvent event）{
FacesMessage msg = new FacesMessage（Success！，event.getFile（）。getFileName（）+is uploaded。）;
FacesContext.getCurrentInstance（）。addMessage（null，msg）;
//用文件
来做你想做的事$ {b $ b copyFile（event.getFile（）。getFileName（），event.getFile（）。getInputstream（））;
} catch（IOException e）{
e.printStackTrace（）;
$ b public void copyFile（String fileName，InputStream in）{
try {
//将inputStream写入FileOutputStream
OutputStream out = new FileOutputStream（new File（destination + fileName））;
int read = 0;
byte [] bytes = new byte [1024]; （（read = in.read（bytes））！= -1）{
out.write（bytes，0，read）;
while
}
in.close（）;
out.flush（）;
out.close（）;
System.out.println（New file created！）;
catch（IOException e）{
System.out.println（e.getMessage（））;
我错过了什么？
警告：PWC4011：无法将上下文/ FileUpload中的请求字符编码设置为UTF-8，因为请求参数已被读取，或ServletRequest.getReader（）已被称为
警告：/index.xhtml @ 15,63 fileUploadListener =＃{fileUploadController.handleFileUpload（event）}：方法handleFileUpload未找到
javax.el .MethodNotFoundException：/index.xhtml @ 15,63 fileUploadListener =＃{fileUploadController.handleFileUpload（event）}：方法handleFileUpload未找到
at com.sun.faces.facelets.el.TagMethodExpression.invoke（TagMethodExpression。 java：109）
at org.primefaces.component.fileupload.FileUpload.broadcast（FileUpload.java:279）
at javax.faces.component.UIViewRoot.broadcastEvents（UIViewRoot.java:759）
at javax.faces.component.UIViewRoot.processDecodes（UIViewRoot.java:935）
at com.sun.faces.lifecycl e.ApplyRequestValuesPhase.execute（ApplyRequestValuesPhase.java:78）
at com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）
at com.sun.faces.lifecycle.LifecycleImpl。执行（LifecycleImpl.java:118）
在javax.faces.webapp.FacesServlet.service（FacesServlet.java:593）
在org.apache.catalina.core.StandardWrapper.service（StandardWrapper.java： 1550）
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:343）
at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:217）
org.primefaces.webapp.filter.FileUploadFilter.doFilter（FileUploadFilter.java:77）
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:256）
at org .apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:217）
at org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:279）
在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:175）
在org.apache.catalina.core.StandardPipeline.doInvoke（StandardPipeline.java:655）
在org.apache .catalina.core.StandardPipeline.invoke（StandardPipeline.java:595）
在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:161）
在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）$ b $在java.lang.Thread.run（Thread.java:722）。
解决方案例外是自我解释。
$ b
javax.el.MethodNotFoundException：/index.xhtml @ 15,63 fileUploadListener =＃{fileUploadController.handleFileUpload（event）}：方法handleFileUpload not found
这个方法确实不存在。它是这个：
$ b $ pre $ public void upload（FileUploadEvent event）{
$ b 使用＃{fileUploadController.upload} 或将方法重命名为 handleFileUpload 。
I'm trying to use PrimeFaces <p:fileUpload>. I have it setup, very much the same as the showcase example, but it does not work. I never get the successful message. I get no errors or anything.
Here's my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<filter>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
<init-param>
<param-name>thresholdSize</param-name>
<param-value>51200</param-value>
</init-param>
<init-param>
<param-name>uploadDirectory</param-name>
<param-value>C:\etc</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>faces/index.xhtml</welcome-file>
</welcome-file-list>
</web-app>
Here's the view:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head></h:head>
<h:form enctype="multipart/form-data">
<p:fileUpload fileUploadListener="#{fileUploadController.handleFileUpload}"
mode="advanced"
update="messages"
sizeLimit="100000"
allowTypes="/(\.|\/)(gif|jpe?g|png)$/"/>
<p:growl id="messages" showDetail="true"/>
</h:form>
</html>
</h:form>
</h:body>
Here's the bean:
package fileUpload;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import org.primefaces.event.FileUploadEvent;
@ManagedBean(name = "fileUploadController")
public class fileUploadController {
private String destination = "c:\test";
public void upload(FileUploadEvent event) {
FacesMessage msg = new FacesMessage("Success! ", event.getFile().getFileName() + " is uploaded.");
FacesContext.getCurrentInstance().addMessage(null, msg);
// Do what you want with the file
try {
copyFile(event.getFile().getFileName(), event.getFile().getInputstream());
} catch (IOException e) {
e.printStackTrace();
}
}
public void copyFile(String fileName, InputStream in) {
try {
// write the inputStream to a FileOutputStream
OutputStream out = new FileOutputStream(new File(destination + fileName));
int read = 0;
byte[] bytes = new byte[1024];
while ((read = in.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
in.close();
out.flush();
out.close();
System.out.println("New file created!");
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
}
What have I missed out?
WARNING: PWC4011: Unable to set request character encoding to UTF-8 from context /FileUpload, because request parameters have already been read, or ServletRequest.getReader() has already been called
WARNING: /index.xhtml @15,63 fileUploadListener="#{fileUploadController.handleFileUpload(event)}": Method handleFileUpload not found
javax.el.MethodNotFoundException: /index.xhtml @15,63 fileUploadListener="#{fileUploadController.handleFileUpload(event)}": Method handleFileUpload not found
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:109)
at org.primefaces.component.fileupload.FileUpload.broadcast(FileUpload.java:279)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:759)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:935)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
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).
解决方案
The exception is self-explaining.
javax.el.MethodNotFoundException: /index.xhtml @15,63 fileUploadListener="#{fileUploadController.handleFileUpload(event)}": Method handleFileUpload not found
This method does indeed not exist. It's instead this one:
public void upload(FileUploadEvent event) {
Use either #{fileUploadController.upload} or rename the method to handleFileUpload.
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