EL Expression解析整数，只要长 [英] EL Expression parsing integer as long

问题描述

我在JBoss 7上使用的JSF 2.0具有质数.在代码的某些部分，我具有以下内容:

I'm using JSF 2.0 with primefaces over JBoss 7. In some part of the code, I have the following:

public void setItemValue(int value) {
    this.value = value;
}

以及在xhtml中:

<p:commandButton ajax="true" value="Button" update="@form" 
action="#{bean.setItemValue(1)}"/>

问题是，当我单击按钮时，我得到一个javax.el.MethodNotFoundException，说setItemValue(java.lang.Long)不存在.当然不是，它应该是int或Integer值！有人看到过这个问题吗?除了改变我的接收方法，还有其他选择吗?谢谢！

The problem is, when I click the button, I get an javax.el.MethodNotFoundException, saying that setItemValue(java.lang.Long) doesn't exists. Off course it doesn't, it should be a int or Integer value! Anyone has seen this problem? there is any alternative other than changing my method to receive a long? Thanks!

编辑:刚刚下载了JBoss 7.2的SNAPSHOT，它可以正常运行.看起来像是JBoss 7.1.1的错误:(

EDIT: Just downloaded the SNAPSHOT of JBoss 7.2, and it works fine on it. Looks like its a bug of JBoss 7.1.1 :(

推荐答案

操作的方法表达式类型为

The method expression type for action is

字符串action()

String action()

所以使用

 public String setItemValue(Integer value) {
    this.value = value;
    return null;
}

另请参阅:

• 将参数传递给JSF操作

更新 您需要将Servlet版本声明为3.0，以充分利用EL 2.2，例如传递参数.为此，将web.xml中的web-app元素更改为此:

UPDATE You need to declare the Servlet version as 3.0 to take full advantage of the EL 2.2 such as passing the parameter. For that change your web-app element in your web.xml to this:

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       
 xmlns="http://java.sun.com/xml/ns/javaee" 
 xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee    
 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID"  
 version="3.0">

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