Question

我正在关注jsf的一些基本教程，并在bean名称userData

中包含以下代码

@ManagedBean(name="userData", eager=true)
@SessionScoped
public class userData implements Serializable
{
    private static final long serialVersionUID = 1L;


    private String name;
    private String password;
    private String welcomeMessage;

    private String selectedCountry = "United Kingdom";
    private static Map<String, String> countries;

    static
    {
        countries = new LinkedHashMap<String, String>();
        countries.put("en", "United Kingdom");
        countries.put("fr","French");
        countries.put("de","Germany");
    }

    public void localeChanged(ValueChangeEvent e)
    {
        selectedCountry = e.getNewValue().toString();
    }

    public void setSelectedCountry(String selectedCountry)
    {
        this.selectedCountry = selectedCountry;
    }

    public String getSelectedCountry()
    {
        return selectedCountry;
    }

    public Map<String, String> getCountries()
    {
        return countries;
    }

    public void userData()
    {
        this.name = "Mario";
    }

    public String getName()
    {
        return name;
    }

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

    public void setPassword(String password)
    {
        this.password = password;
    }

    public String getPassword()
    {
        return this.password;
    }

    public String login()
    {
        return "result";
    }

    public String getWelcomeMessage()
    {
        return "hello" + name;
    }
}

在.xhtml页面的另一边我有一部分html代码如下：

<h:form>
        <h1>
            #{userData.selectedCountry}
        </h1>
        <h:selectOneMenu value="#{userData.selectedCountry}" 
                         onchange="submit()"
                        valueChangeListener="#{userData.localeChanged}">
            <f:selectItems value="#{userData.countries}"/> 
        </h:selectOneMenu>
        <br/>
        <h1>
            Country Name : 
            <h:outputText id="country" value="#{userData.selectedCountry}"/>
        </h1>
    </h:form>

但是当我在服务器上执行页面时，会产生以下错误： useBeans.xhtml：在类型userData上找不到属性'selectedCountry'。有谁可以请突出我做错了什么？

Answer 1

在我的情况下，原因是因为我复制了一个包含serialVersionUID字段的类：

private static final long serialVersionUID = 5443351151396868724L;

所以我有两个不同的类和对象具有相同的serialVersionUID，这就是问题的线索。

JSF错误：找不到属性

1 个答案: