JSF参数传递方式之二：Backing Bean 与 h:inputHidden标签

JSF参数传递方式之二：Backing Bean 与 h:inputHidden标签

Backing Bean

importjavax.faces.component.UIInput;
 importjavax.faces.component.UIOutput;

 publicclassBackingBean
{

 privateUIOutputidComponent;

 publicUIOutputgetIdComponent()
{
 returnidComponent;
}

 publicvoidsetIdComponent(UIOutputidComponent)
{
 this.idComponent=idComponent;
}


}

import javax.faces.component.UIInput;
import javax.faces.component.UIOutput;

public class BackingBean
{

    private UIOutput idComponent;

    public UIOutput getIdComponent()
    {
        return idComponent;
    }

    public void setIdComponent(UIOutput idComponent)
    {
        this.idComponent = idComponent;
    }


}

页面到Bean的参数传递
页面中设置参数：

<h:form>
 <h:inputHiddenvalue="123456"binding="#{backingBean.idComponent}"></h:inputHidden>
 <h:commandButtonvalue="登录"action="#{paramBean.login}"></h:commandButton>
</h:form>

<h:form>
			<h:inputHidden value="123456" binding="#{backingBean.idComponent}"></h:inputHidden>
			<h:commandButton value="登录" action="#{paramBean.login}"></h:commandButton>
		</h:form>

后台取参数：

FacesContextcontext=FacesContext.getCurrentInstance();
 BackingBeanbackBean=(BackingBean)context.getApplication().getVariableResolver().resolveVariable(context,"backingBean");//该方法已经过时
 BackingBeanbean=(BackingBean)context.getApplication().getELResolver().getValue(context.getELContext(),null,"backingBean");
backBean.getIdComponent().getValue();
bean.getIdComponent().getValue();

FacesContext context = FacesContext.getCurrentInstance();
        BackingBean backBean =(BackingBean)context.getApplication().getVariableResolver().resolveVariable(context,"backingBean");//该方法已经过时
        BackingBean bean =(BackingBean)context.getApplication().getELResolver().getValue(context.getELContext(), null, "backingBean");
        backBean.getIdComponent().getValue();
        bean.getIdComponent().getValue();

2.2页面到页面的参数传递
页面中设置参数：

<h:form>
 <h:inputHiddenvalue="123456"binding="#{backingBean.idComponent}"></h:inputHidden>
 <h:commandButtonvalue="Test5"action="param"></h:commandButton>
 <h:commandLinkvalue="Test6"action="param"></h:commandLink>
</h:form>

<h:form>
		<h:inputHidden value="123456" 			binding="#{backingBean.idComponent}"></h:inputHidden>
		<h:commandButton value="Test5" 	action="param"></h:commandButton>
		<h:commandLink value="Test6" action="param"></h:commandLink>
	</h:form>

注意：h:outputLink 标签不能使用该方式传递参数！
页面中取参数：

<h:outputTextvalue="#{backingBean.idComponent.value}"></h:outputText>