Question

我的应用程序是cosist：

index.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://xmlns.jcp.org/jsf/html"
    xmlns:f="http://xmlns.jcp.org/jsf/core"
    xmlns:p="http://primefaces.org/ui">

<h:head>
    <title>Date Input of Users</title>
</h:head>

<body>

    <p:fieldset legend="name of home">

        <!-- form to insert a user data -->
        <h:form>

            <b>name of User:</b>
            <h:inputText value="#{home.name}"/><br/>

            <p:commandButton action="#{home.res}" ajax="false"      
                value="Save" />                                         <!-- button to save --> 
            <p />

        </h:form>


    </p:fieldset>

</body>

</html>

我的bean是 - ＆gt;

package prova;

import javax.annotation.ManagedBean;
import javax.faces.bean.SessionScoped;

@SessionScoped
@ManagedBean

public class Home {

    //fields
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    //change a page
    public String res(){
        return ("results");
    }
}

但是当点击保存按钮时，我的服务器tomcat会返回错误而不是页面错误是：

javax.el.PropertyNotFoundException: Target Unreachable, identifier 'home' resolved to null

感谢所有人，对不起我的英语

Answer 1

将该bean的导入更改为：

javax.faces.bean.ManagedBean;

另见：

Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean

JSF javax.el.PropertyNotFoundException：Target Unreachable，identifier＆＃39; home＆＃39;解析为null

1 个答案: