フォームの送信に基づいてボタンを有効または無効にする簡単な例を試しています。プレーンなhtml5とjsfを混在させているので、誰かがjsf:idの概念を教えてくれる場合もあります。
以下は関連するコードです。
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:jsf="http://java.sun.com/jsf"
xmlns:f="http://java.sun.com/jsf/core">
<head jsf:id="head">
<title>Putting it all together </title>
<!-- script jsf:target="body" jsf:name="js.js"/>
<link jsf:name="css.css" rel="stylesheet" type="text/css" /-->
</head>
<body jsf:id="body">
<form jsf:id="form" jsf:prependId="false">
<label jsf:for="name">Name </label>
<input jsf:id="name" type="text" jsf:value="#{complex.name}">
<f:ajax execute="@this" render="progress"/>
</input>
<label jsf:for="tel">Tel </label>
<input jsf:id="tel" type="tel" jsf:value="#{complex.tel}">
<f:ajax execute="@this" render="progress"/>
</input>
<label jsf:for="email">Email </label>
<input jsf:id="email" type="email" jsf:value="#{complex.email}">
<f:ajax execute="@this" render="progress"/>
</input>
<label for="progress">Progress </label>
<progress jsf:id="progress" max="3">#{complex.progress} of 3 </progress>
<input jsf:id="submit" type="submit" value="submit">
<f:ajax execute="@this" render="login" event="click" listener="#{complex.process}" />
</input>
<!-- label jsf:id="status"></label-->
<button jsf:id="login" disabled="#{complex.status}">Login</button>
</form>
</body>
</html>
マネージド Bean は次のとおりです。
package mypackage.bean;
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.event.AjaxBehaviorEvent;
@ManagedBean
@SessionScoped
public class Complex implements Serializable {
public Complex() {}
private String name;
private String tel;
private String email;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
private boolean status;
public void process(AjaxBehaviorEvent event) {
status = !status;
}
public boolean isStatus() {
return status;
}
public boolean getStatus() {
return status;
}
public void setStatus(boolean status) {
this.status = status;
}
public String getProgress() {
int progress = 0;
if(name != null) {
progress++;
}
if(tel != null) {
progress++;
}
if(email != null) {
progress++;
}
return progress + "";
}
}
Web ページに出力されたエラーは次のとおりです。
HTTP Status 500 - java.lang.Boolean cannot be cast to java.lang.String
type Exception report
message java.lang.Boolean cannot be cast to java.lang.String
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: java.lang.Boolean cannot be cast to java.lang.String
javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
root cause
java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
com.sun.faces.renderkit.html_basic.HtmlResponseWriter.getAttributeValue(HtmlResponseWriter.java:1210)
com.sun.faces.renderkit.html_basic.HtmlResponseWriter.flushAttributes(HtmlResponseWriter.java:1170)
com.sun.faces.renderkit.html_basic.HtmlResponseWriter.closeStartIfNecessary(HtmlResponseWriter.java:1112)
com.sun.faces.renderkit.html_basic.HtmlResponseWriter.writeText(HtmlResponseWriter.java:935)
com.sun.faces.facelets.compiler.LiteralTextInstruction.write(LiteralTextInstruction.java:76)
com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82)
com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:183)
javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:900)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1847)
javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:900)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1847)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1850)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1850)
com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:443)
com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:202)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.35 logs.
Apache Tomcat/7.0.35