将属性设置为 jsf 托管 bean
首先有以下 .jsf：
<ui:repeat var="prod" value="#{showProducts.decoys}">
<h:form>
{prod.price}
{prod.weight}
{prod.size} >
<h:commandButton value="Buy" action="shoppingCart"/>
</h:form>
</ui:repeat>
有以下 shoppingCart.jsf：
<h:form>
<h:dataTable value="#{prod}">
<h:column>
#{prod.name}<br/>
</h:column>
<h:column>
#{prod.price}<br/>
</h:column>
<h:column>
<h:inputText value="#{prod.count}" size="3"/>
</h:column>
</h:dataTable>
<h:inputText value="#{order.phone}"/><br/>
<h:inputText value="#{order.mail}"><br/>
<h:inputText value="#{order.city}"/><br/>
<h:commandButton value="Order" action="#{showProducts.persistOrder}">
</h:form>
Faces-config：
<managed-bean>
<managed-bean-name>showProducts</managed-bean-name>
<managed-bean-class>main.ShowProducts</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
...
<managed-property>
<property-name>product</property-name>
<value>#{product}</value>
</managed-property>
</managed-bean>
<managed-bean>
<managed-bean-name>product</managed-bean-name>
<managed-bean-class>main.Product</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
...
问题：
托管 Bean 名称定义为 product
迭代是这样的（shoppingCart.jsf）：h:dataTable value="#{prod}">
因此，这意味着此迭代无论如何都不会与名为 product 的 bean 连接
如何将属性 prod.price,prod.weight,prod.count 设置为真正的托管 bean 属性：< br>
product.price,product.weight,product.size
Have following first .jsf:
<ui:repeat var="prod" value="#{showProducts.decoys}">
<h:form>
{prod.price}
{prod.weight}
{prod.size} >
<h:commandButton value="Buy" action="shoppingCart"/>
</h:form>
</ui:repeat>
Have following shoppingCart.jsf:
<h:form>
<h:dataTable value="#{prod}">
<h:column>
#{prod.name}<br/>
</h:column>
<h:column>
#{prod.price}<br/>
</h:column>
<h:column>
<h:inputText value="#{prod.count}" size="3"/>
</h:column>
</h:dataTable>
<h:inputText value="#{order.phone}"/><br/>
<h:inputText value="#{order.mail}"><br/>
<h:inputText value="#{order.city}"/><br/>
<h:commandButton value="Order" action="#{showProducts.persistOrder}">
</h:form>
Faces-config:
<managed-bean>
<managed-bean-name>showProducts</managed-bean-name>
<managed-bean-class>main.ShowProducts</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
...
<managed-property>
<property-name>product</property-name>
<value>#{product}</value>
</managed-property>
</managed-bean>
<managed-bean>
<managed-bean-name>product</managed-bean-name>
<managed-bean-class>main.Product</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
...
The problem:
managed bean name defined as product
iteration goes this way(shoppingCart.jsf):h:dataTable value="#{prod}">
so it means that this iteration is not connected with bean named product anyhow
How to set properties prod.price,prod.weight,prod.count to real managed bean properties:
product.price,product.weight,product.size
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评论（1）
有两个问题：
您没有在会话作用域 bean 中设置特定的
prod。你应该这样做。顺便说一句，
托管属性声明仅在父 bean 的创建期间将新/空 bean 设置为属性。这不一定与ui:repeat中的 相同prod实例相同。您只需从faces-config.xml中删除#{product}bean 即可。h:dataTable在这里没有任何意义。此处需要h:panelGrid。There are two problems:
You aren't setting a specific
prodin the session scoped bean. You should do this.By the way, the
managed-propertydeclaration only sets an new/empty bean as property during parent bean's ceration. This is not necessarily the sameprodinstance as you have in theui:repeat. You can just remove the#{product}bean from yourfaces-config.xml.The
h:dataTabledoesn't make any sense here. You needh:panelGridhere.