我正在尝试创建一个paginator复合组件。该组件应为每个可用页面呈现commandLink。它看起来像这样:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:ui="http://java.sun.com/jsf/facelets">
<cc:interface>
<cc:attribute name="action" targets="jumpButton" required="true"/>
<cc:attribute name="bean" type="java.lang.Object" required="true"/>
</cc:interface>
<cc:implementation>
<ui:repeat value="#{cc.attrs.bean.pages}" var="page">
<h:commandLink id="jumpButton"
actionListener="#{cc.attrs.bean.jumpToPage(page)}">
<h:outputText value="#{page}"/>
</h:commandLink>
</ui:repeat>
</cc:implementation>
</html>
该组件用于各种页面:
<ccc:paginator bean="#{myBean}"
action="/index?faces-redirect=true&includeViewParams=true"/>
或者:
<ccc:paginator bean="#{myOtherBean}"
action="/dir/index?faces-redirect=true&includeViewParams=true"/>
注意使用faces-redirect = true和includeViewParams = true,据我所知,复合组件中的commandLinks不能直接使用它。
问题是jumpButton不能成为目标因为它在ui:repeat里面。我收到了消息:
javax.servlet.ServletException: /index?faces-redirect=true&includeViewParams=true : Unable to re-target MethodExpression as inner component referenced by target id 'jumpButton' cannot be found.
如果我在ui:repeat之外创建一个id =“jumpButton”的命令链接,则复合组件和按钮工作正常。如何使用ui:repeat?
中的命令链接使我的复合组件工作托管bean的jumpToPage操作:
public String jumpToPage(String path, Integer page) {
...
setCurrentPage(page);
return path;
}
复合组件:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:ui="http://java.sun.com/jsf/facelets">
<cc:interface>
<cc:attribute name="bean" type="java.lang.Object" required="true"/>
<cc:attribute name="path" type="java.lang.String" required="true"/>
</cc:interface>
<cc:implementation>
<ui:repeat value="#{cc.attrs.bean.pages}" var="page">
<h:commandLink id="jumpButton"
action="#{cc.attrs.bean.jumpToPage(cc.attrs.path, page)}">
<h:outputText value="#{page}"/>
</h:commandLink>
</ui:repeat>
</cc:implementation>
</html>
组件使用示例:
<ccc:paginator bean="#{myBean}"
path="/index?faces-redirect=true&includeViewParams=true"/>
<ccc:paginator bean="#{myOtherBean}"
path="/dir/index?faces-redirect=true&includeViewParams=true"/>
答案 0 :(得分:2)
您应该删除<cc:interface>
中的操作属性。因为您通过bean属性调用操作,所以不需要它。
更新1
您还可以将操作的结果定义为bean的返回值。像这样:
public class MyBean {
public String jumpToPage(int page){
// ...
return "/index?faces-redirect=true&includeViewParams=true";
}
}
然后使用action
代替actionListener
:
<h:commandLink id="jumpButton" action="#{cc.attrs.bean.jumpToPage(page)}">
<h:outputText value="#{page}"/>
</h:commandLink>