JSF参数传递方式说明

先说明一种：

 

-----------------------------------------
 <h:commandLink value="整理材料 " action="#{documentPressBackingBean.cleanDatum}" target="HideFrame">
                                                      <f:param name="documentArchiveId" value="#{pre.documentArchiveId}"></f:param>
                                                </h:commandLink>
                                                <h:outputLabel styleClass="icoArrange" id="show"></h:outputLabel>
                                                 <h:commandButton value="整理材料" action="#{documentPressBackingBean.cleanDatum}"

onclick="this.form.target='HideFrame';" style="display:none">
             <x:updateActionListener property="#

{documentPressBackingBean.documentArchiveId}" value="#{pre.documentArchiveId}" />
            </h:commandButton>

------------------------------------------------

 

以下是其他方式：

 

JSF参数传递方式之一：f:param标签

页面到Bean的参数传递
页面中设置参数：

Java代码

<h:form>   
            <h:commandLink value="Test2" action="#{paramBean.test}">   
                <f:param name="name" value="zhang"></f:param>   
                <f:param name="id" value="123456"></f:param>   
            </h:commandLink>   
</h:form>  
<h:form>

     <h:commandLink value="Test2" action="#{paramBean.test}">

      <f:param name="name" value="zhang"></f:param>

      <f:param name="id" value="123456"></f:param>

     </h:commandLink>

</h:form>

 

注意:这里只能使用h:commandLink标签，而不能使用h:commandButton标签!
后台取参数：
(1) 通过Request对象取值

Java代码

HttpServletRequest request = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();   
        request.getParameter("name");  
HttpServletRequest request = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();

        request.getParameter("name");

        (2)通过RequestParameterMap取值

Java代码

Map varMap = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();   
        varMap.get("id");  
Map varMap = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();

        varMap.get("id");

        (3)通过配置文件进行Bean的属性值注入，在Bean的方法中直接使用属性

Java代码

<managed-bean>   
  <managed-bean-name>paramBean</managed-bean-name>   
  <managed-bean-class>com.spg.bean.ParamBean</managed-bean-class>   
  <managed-bean-scope>request</managed-bean-scope>   
  <managed-property>   
   <property-name>id</property-name>   
   <property-class>java.lang.String</property-class>   
   <value>#{param.id} </value>   
  </managed-property>   
</managed-bean>  
<managed-bean>

  <managed-bean-name>paramBean</managed-bean-name>

  <managed-bean-class>com.spg.bean.ParamBean</managed-bean-class>

  <managed-bean-scope>request</managed-bean-scope>

  <managed-property>

   <property-name>id</property-name>

   <property-class>java.lang.String</property-class>

   <value>#{param.id} </value>

  </managed-property>

</managed-bean>

页面到页面的参数传递
页面中设置参数：
(1)

Java代码

<h:outputLink value="param2.jsf">   
                <h:outputText value="Test4"></h:outputText>   
                <f:param name="name" value="chen"></f:param>   
                <f:param name="id" value="123456"></f:param>   
    </h:outputLink>  
<h:outputLink value="param2.jsf">

      <h:outputText value="Test4"></h:outputText>

      <f:param name="name" value="chen"></f:param>

      <f:param name="id" value="123456"></f:param>

  </h:outputLink>

(2)

Java代码

<h:outputLink value="param2.jsf?name=chen&id=123456">   
                <h:outputText value="Test4"></h:outputText>   
    </h:outputLink>  
<h:outputLink value="param2.jsf?name=chen&id=123456">

      <h:outputText value="Test4"></h:outputText>

  </h:outputLink>

注意：以上两种方法，不能同时使用!
页面中取参数：
(1) 使用JSF的值表达式

Java代码

<h:outputText value="#{param.name}"></h:outputText>    
    <h:outputText value="#{param.id}"></h:outputText>  
<h:outputText value="#{param.name}"></h:outputText>

  <h:outputText value="#{param.id}"></h:outputText>

(2) 使用JSP的表达式

Java代码

<%=request.getParameter("name")%>   
    <%=request.getParameter("id")%>  
 

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

Backing Bean

Java代码

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;   
    }   
  
  
}  
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：

Java代码

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

Java代码

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();  
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：

Java代码

<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>  
<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：

Java代码

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

JSF参数传递方式之三：通过session(application)对象传递

页面到Bean的参数传递
页面中设置参数：

Java代码

<h:form>   
            <%session.setAttribute("name","hujilie"); %>   
            <%application.setAttribute("id","123456"); %>   
            <h:commandButton value="Test8" action="#{paramBean.test2}"></h:commandButton>   
            <h:commandLink  value="Test8" action="#{paramBean.test2}"></h:commandLink>   
    </h:form>  
<h:form>

      <%session.setAttribute("name","hujilie"); %>

      <%application.setAttribute("id","123456"); %>

      <h:commandButton value="Test8" action="#{paramBean.test2}"></h:commandButton>

      <h:commandLink  value="Test8" action="#{paramBean.test2}"></h:commandLink>

  </h:form>

后台取参数：

Java代码

FacesContext context = FacesContext.getCurrentInstance();   
        Map sessionMap =context.getExternalContext().getSessionMap();   
        Map applicationMap = context.getExternalContext().getApplicationMap();   
HttpSession session =(HttpSession) context.getExternalContext().getSession(true);   
ServletContext application = (ServletContext)context.getExternalContext().getContext();   
        sessionMap.get("name");   
        applicationMap.get("id");   
        session.getAttribute("name");   
        application.getAttribute("id");  
FacesContext context = FacesContext.getCurrentInstance();

        Map sessionMap =context.getExternalContext().getSessionMap();

        Map applicationMap = context.getExternalContext().getApplicationMap();

HttpSession session =(HttpSession) context.getExternalContext().getSession(true);

ServletContext application = (ServletContext)context.getExternalContext().getContext();

        sessionMap.get("name");

   applicationMap.get("id");

   session.getAttribute("name");

        application.getAttribute("id");

页面到页面的参数传递
页面中设置参数：

Java代码

<h:form>   
            <%session.setAttribute("name","hujilie"); %>   
            <%application.setAttribute("id","123456"); %>   
            <h:outputLink value="param2.jsf">Test10</h:outputLink>   
    </h:form>  
<h:form>

      <%session.setAttribute("name","hujilie"); %>

      <%application.setAttribute("id","123456"); %>

      <h:outputLink value="param2.jsf">Test10</h:outputLink>

  </h:form>

页面中取参数：

Java代码

<h:outputText value="#{sessionScope.name}"></h:outputText><br>   
    <h:outputText value="#{applicationScope.id}"></h:outputText>  
 

JSF参数传递方式之四：f:attribute标签传递

页面到Bean的参数传递
页面中设置参数：

Java代码

<h:form>   
            <h:commandButton action="#{paramBean.test3}" value="Test11" actionListener="#{paramBean.changeName}">   
                <f:attribute name="name" value="hujilie"/>   
            </h:commandButton>   
            <h:commandLink action="#{paramBean.test3}" value="Test12" actionListener="#{paramBean.changeName}">   
                <f:attribute name="name" value="hujilie"/>   
            </h:commandLink>   
    </h:form>  
<h:form>

      <h:commandButton action="#{paramBean.test3}" value="Test11" actionListener="#{paramBean.changeName}">

        <f:attribute name="name" value="hujilie"/>

      </h:commandButton>

      <h:commandLink action="#{paramBean.test3}" value="Test12" actionListener="#{paramBean.changeName}">

        <f:attribute name="name" value="hujilie"/>

      </h:commandLink>

  </h:form>

后台取参数：

Java代码

public void changeName(ActionEvent e)   
    {   
        UIComponent component = e.getComponent();   
        Map<String, Object> map = component.getAttributes();   
        setName((String)map.get("name"));   
    }  
 

JSF参数传递方式之五：f:setPropertyActionListener 标签传递

页面到Bean的参数传递
页面中设置参数：

Java代码

<h:form>   
            <h:commandButton action="#{paramBean.test3}" value="Test14">  
                <f:setPropertyActionListener value="hujilie" target="#{paramBean.name}"/>   
            </h:commandButton>   
            <h:commandLink action="#{paramBean.test3}" value="Test15">   
                <f:setPropertyActionListener value="hujilie" target="#{paramBean.name}"/>   
            </h:commandLink>   
    </h:form>  
<h:form>

      <h:commandButton action="#{paramBean.test3}" value="Test14">

        <f:setPropertyActionListener value="hujilie" target="#{paramBean.name}"/>

      </h:commandButton>

      <h:commandLink action="#{paramBean.test3}" value="Test15">

        <f:setPropertyActionListener value="hujilie" target="#{paramBean.name}"/>

      </h:commandLink>

  </h:form>

后台取参数：直接使用属性的值。