3
似乎我不清楚我以前关于托管bean的问题。所以,我再次以更系统的方式发布它。关于托管bean之间的通信的JSF问题
我有一个页面: -
<?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:ui="http://java.sun.com/jsf/facelets">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<ui:insert name="head">
</ui:insert>
<br/><br/>
<h:inputText value="#{MasterBean.laala}"/>
<br/><br/>
<ui:insert name="content">
</ui:insert>
</h:body>
</html>
这是它的豆: -
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
@ManagedBean(name="MasterBean")
@ViewScoped
public class MasterBean {
private String laala;
public String getLaala() {
return laala;
}
public void setLaala(String laala) {
this.laala = laala;
}
public MasterBean() {
}
}
这是data.xhtml它使用master.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:ui="http://java.sun.com/jsf/facelets">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<ui:composition template="master.xhtml">
<ui:define name="head">
laala
</ui:define>
<h:outputText value="#{pageBean.content}"/>
<ui:define name="content">
<h:commandButton actionListener="#{pageBean.speakHello}"/>
</ui:define>>
</ui:composition>
</h:body>
</html>
这是它的豆: -
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
@ManagedBean(name="pageBean")
@ViewScoped
public class pageBean {
private String content;
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public void speakHello(){
//how do i get value of laaala here which is in MasterBean???
content = ??? + " Hello friend";
}
public pageBean() {
}
}
请填写空格在哪里?在speakHello()中标记。我如何获得这个bean中其他bean的价值?我想这次我很清楚。请BalusC,Bozho和其他java专家,如果我知道,我仍然不清楚。
感谢提前:) 这次我肯定期待一个答案:)
太棒了! GrzegorzOledzki :)。投票并打勾标记以获得正确答案。首先,我得到了异常,但幸运的是,它吸引了一个有意义的例外,那就是吸气和吸气设备不在那里。一旦我创建它们,它工作顺利和罚款。哇再次感谢:) – TCM 2010-05-06 08:30:37