我使用 Primefaces 手册示例作为向导，并用一个简单的文件上传表单替换其中一个选项卡。我拥有所有必要的库并在 web-inf 中进行过滤，以使文件上传正常工作。使用 Netbeans 运行项目不会显示任何错误（显示向导并且 UI 响应），但是文件没有上传，并且我的 fileBean 类没有收到系统消息。任何线索我在哪里犯了错误？我在 index.html 中的嵌套表单有问题吗？谢谢！
索引.xhtml：
<?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:p="http://primefaces.org/ui">
<h:head>
<title>The rings of scholarship</title>
</h:head>
<h:body>
<h:form>
<p:growl id="growl" sticky="true" showDetail="true"/>
<p:wizard widgetVar="wiz"
flowListener="#{userWizard.onFlowProcess}">
<p:tab id="personal" title="Personal">
<p:panel header="Personal Details">
<h:messages errorClass="error"/>
<h:panelGrid columns="2" columnClasses="label, value" styleClass="grid">
<h:outputText value="Firstname: *" />
<p:inputText required="true" label="Firstname"
value="#{userWizard.user.firstname}" />
<h:outputText value="Lastname: *" />
<p:inputText required="true" label="Lastname"
value="#{userWizard.user.lastname}" />
<h:outputText value="Age: " />
<p:inputText value="#{userWizard.user.age}" />
<h:outputText value="Skip to last: " />
<h:selectBooleanCheckbox value="#{userWizard.skip}" />
</h:panelGrid>
</p:panel>
</p:tab>
<p:tab id="upload" title="File upload">
<p:panel header="File upload">
<h:messages errorClass="error"/>
<h:panelGrid columns="2" columnClasses="label, value">
<h:form enctype="multipart/form-data">
<p:fileUpload value="#{fileBean.file}" mode="simple" />
<p:commandButton value="Submit" action="#{fileBean.save}" ajax="false"/>
</h:form>
</h:panelGrid>
<h:outputText value="Skip to last: " />
<h:selectBooleanCheckbox value="#{userWizard.skip}" />
</p:panel>
</p:tab>
<p:tab id="contact" title="Contact">
<p:panel header="Contact Information">
<h:messages errorClass="error"/>
<h:panelGrid columns="2" columnClasses="label, value">
<h:outputText value="Email: *" />
<p:inputText required="true" label="Email"
value="#{userWizard.user.email}" />
<h:outputText value="Phone: " />
<p:inputText value="#{userWizard.user.phone}"/>
<h:outputText value="Additional Info: " />
<p:inputText value="#{userWizard.user.info}"/>
</h:panelGrid>
</p:panel>
</p:tab>
<p:tab id="confirm" title="Confirmation">
<p:panel header="Confirmation">
<h:panelGrid id="confirmation" columns="6">
<h:outputText value="Firstname: " />
<h:outputText styleClass="outputLabel"
value="#{userWizard.user.firstname}" />
<h:outputText value="Lastname: " />
<h:outputText styleClass="outputLabel"
value="#{userWizard.user.lastname}"/>
<h:outputText value="Age: " />
<h:outputText styleClass="outputLabel"
value="#{userWizard.user.age}" />>
<h:outputText value="Email: " />
<h:outputText styleClass="outputLabel"
value="#{userWizard.user.email}" />
<h:outputText value="Phone " />
<h:outputText styleClass="outputLabel"
value="#{userWizard.user.phone}"/>
<h:outputText value="Info: " />
<h:outputText styleClass="outputLabel"
value="#{userWizard.user.info}" />
<h:outputText />
<h:outputText />
</h:panelGrid>
<p:commandButton value="Submit" update="growl"
actionListener="#{userWizard.save}"/>
</p:panel>
</p:tab>
</p:wizard>
</h:form>
</h:body>
</html>
文件豆：
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.bean.ViewScoped;
import org.apache.commons.io.IOUtils;
import org.primefaces.model.UploadedFile;
@ManagedBean
@ViewScoped
public class FileBean implements Serializable{
private UploadedFile file;
/**
* Creates a new instance of FileBean
*/
public FileBean() {
}
public UploadedFile getFile() {
System.out.println("we get file");
return file;
}
public void setFile(UploadedFile file) throws FileNotFoundException, IOException {
System.out.println("we set file");
this.file = file;
}
public void save() throws IOException {
System.out.println("we save file");
IOUtils.copy(file.getInputstream(), new FileOutputStream("D:\\" + file.getFileName()));
BufferedReader br = new BufferedReader(new InputStreamReader(file.getInputstream()));
String currLine = br.readLine();
Integer counterLines = 0;
while (currLine != null && counterLines < 5) {
System.out.println("currLine is: " + currLine);
counterLines++;
}
}
}
用户向导：
import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import org.primefaces.event.FlowEvent;
@ManagedBean
@ViewScoped
public class UserWizard implements Serializable{
private User user = new User();
private boolean skip;
private static final Logger logger = Logger.getLogger(UserWizard.class.getName());
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public void save(ActionEvent actionEvent) {
//Persist user
FacesMessage msg = new FacesMessage("Successful", "Welcome :" + user.getFirstname());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public boolean isSkip() {
return skip;
}
public void setSkip(boolean skip) {
this.skip = skip;
}
public String onFlowProcess(FlowEvent event) {
logger.log(Level.INFO, "Current wizard step:{0}", event.getOldStep());
logger.log(Level.INFO, "Next step:{0}", event.getNewStep());
if (skip) {
skip = false; //reset in case user goes back
return "confirm";
} else {
return event.getNewStep();
}
}
}