3
似乎我不清楚我以前關於託管bean的問題。所以,我再次以更系統的方式發佈它。關於託管bean之間的通信的JSF問題
我有一個頁面: -
<?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>
這是它的豆: -
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() {
}
}
這是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>
這是它的豆: -
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() {
}
}
請填寫空格在哪裏?在speakHello()中標記。我如何獲得這個bean中其他bean的價值?我想這次我很清楚。請BalusC,Bozho和其他java專家,如果我知道,我仍然不清楚。
感謝提前:) 這次我肯定期待一個答案:)
太棒了! GrzegorzOledzki :)。投票並打勾標記以獲得正確答案。首先,我得到了異常,但幸運的是,它吸引了一個有意義的例外,那就是吸氣和吸氣設備不在那裏。一旦我創建它們,它工作順利和罰款。哇再次感謝:) – TCM 2010-05-06 08:30:37