Question

我再次遇到一个无法找到解决方案的问题。

托管bean

@Named(value="changeInfoBean")
@RequestScoped
public class ChangeInfoBean {

    private String email;
    private String firstName;
    private String lastName;

    /** Creates a new instance of ChangeInfoBean */
    public ChangeInfoBean() {
            FacesContext context = FacesContext.getCurrentInstance();
            // Gets the user which is currently logged in
            LoginBean bean = (LoginBean) context.getExternalContext().getSessionMap().get("loginBean");
            BasicUser user = bean.getUser();
            this.email = user.getEmail();
            this.firstName = user.getFirstName();
            this.lastName = user.getLastName();

    }

    public String changeName() {
        Session session = HibernateUtil.getSessionFactory().openSession();
        try {
            Transaction tx = session.beginTransaction();
            BasicUser updateUser = (BasicUser) session.load(BasicUser.class, this.email);
            updateUser.setFirstName(firstName);
            updateUser.setLastName(lastName);
            tx.commit();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
        finally {
            session.close();
            return "succes";
        }
    }

回归“成功”就是回归。使用bean的页面的一部分

<h:panelGroup rendered="#{param.change == 'name'}">
            <h:form id="changeNameForm">
                <h:messages/>
                <h:panelGrid id="panel1" columns="2">
                    First Name:
                    <h:inputText id="firstName" value="#{changeInfoBean.firstName}"/>
                    Last Name:
                    <h:inputText id="lastName" value="#{changeInfoBean.lastName}"/>
                    <f:facet name="footer">
                        <h:panelGroup style="display:block; text-align:center">
                            <h:commandButton value="Submit Name" action="#{changeInfoBean.changeName}"/>
                        </h:panelGroup>
                    </f:facet>
                </h:panelGrid>
            </h:form>
        </h:panelGroup>

我已经检查过所有它在每个生命周期阶段运行，尝试使bean会话作用域并尝试设置immediate =“true”。我试图删除inputText字段，只剩下commandButton。在每种情况下，都不会调用方法changeName（）。可以做些什么？

Answer 1

显然，#{param.change}在表单提交请求期间不等于"name"导致h:panelGroup不呈现，这反过来导致不调用按钮的操作。

将以下内容添加到表单中：

<input type="hidden" name="change" value="#{param.change}" />

这将保留后续请求的#{param.change}。将bean放在会话范围内只有在#{sessionBean.change}时才有效。

另见：

When an UICommand component won't be invoked

不调用JSF Action

1 个答案:

另见：