Jsf 向ArrayList添加的字符串未显示/未更新
…所以我有了@ApplicationScoped Bean“应用程序”: Facelet如下所示:Jsf 向ArrayList添加的字符串未显示/未更新,jsf,arraylist,Jsf,Arraylist,…所以我有了@ApplicationScoped Bean“应用程序”: Facelet如下所示: <!-- EMAILS --> <h3>Configured Emails</h3> <h:form> <h:inputText value="Email" var="email"/> <h:commandButton value="Add Email" action="#{Appl
<!-- EMAILS -->
<h3>Configured Emails</h3>
<h:form>
<h:inputText value="Email" var="email"/>
<h:commandButton value="Add Email" action="#{Application.addEmail(email)}"/>
</h:form>
<h:form>
<ui:repeat var="email" value="#{Application.emails}">
<tr>
<td>#{email}</td>
<td>
<f:facet name="header">Action</f:facet>
<h:commandLink value="Delete" action="#{Application.rmEmail(email)}"/>
</td>
</tr>
<br></br>
</ui:repeat>
</h:form>
配置电子邮件
#{email}
行动
…所以当我尝试添加“blabla@bla.com“,这是结果:
- 有一个删除按钮显示,但不是字符串本身李>
- 是否正确添加了字符串-并且JSF不会重新呈现视图
- ..或者字符串添加不正确
public List<Feed> sentNotifications = new ArrayList<>();
public List<String> emails = new ArrayList<>();
public List<String> words = new LinkedList<>(Arrays.asList("vuln", "banana", "pizza", "bonanza"));
public List<String> feeds = new LinkedList<>(
Arrays.asList("http://www.kb.cert.org/vulfeed",
"https://ics-cert.us-cert.gov/advisories/advisories.xml",
"https://ics-cert.us-cert.gov/alerts/alerts.xml")
);
private String currentEmail;
private String currentFeed;
private String currentWord;
..和gui.xhtml:
<!-- EMAILS -->
<h3>Configured Emails</h3>
<h:form>
<h:inputText value="#{Application.currentEmail}" var="email"/>
<h:commandButton value="Add Email" action="#{Application.addEmail}"/>
</h:form>
<h:form>
<ui:repeat var="email" value="#{Application.emails}">
<tr>
<td>#{email}</td>
<td>
<f:facet name="header">Action</f:facet>
<h:commandLink value="Delete" action="#{Application.rmEmail(email)}"/>
</td>
</tr>
<br></br>
</ui:repeat>
</h:form>
配置电子邮件
#{email}
行动
请注意action=“#{Application.addEmail}”
如何不使用参数,而是通过value=“#{Application.currentmail}”
将参数传递给方法
如果你,读者,有同样的问题,请考虑以下几点:
- bean中每个字段的getter/setter
- 原始字段李>
- “委托”基本字段的无参数方法,例如my addEmail方法
Gewure@Kukeltje我正在使用JSF2和Primefaces来做这件事,你为什么要把它编辑掉?因为你的问题中没有JSF-2或Primefaces的具体内容。它是简单的JSF。仅仅是你正在(某处)使用PrimeFaces这一事实并没有理由将其用作tag@Kukeltje好的,好的。。。你知道答案吗?:)我将为您提供一个链接,但请阅读一些好的教程。代码中非常基本的错误:谢谢@Kukeltje,。。。我现在明白了。我已经阅读了很多教程,但您可能会发现它并不总是很简单,尤其是如果JSF出于某种奇怪的原因不喜欢来自xhtml的参数化方法调用。不过,我学到了很多!
public List<Feed> sentNotifications = new ArrayList<>();
public List<String> emails = new ArrayList<>();
public List<String> words = new LinkedList<>(Arrays.asList("vuln", "banana", "pizza", "bonanza"));
public List<String> feeds = new LinkedList<>(
Arrays.asList("http://www.kb.cert.org/vulfeed",
"https://ics-cert.us-cert.gov/advisories/advisories.xml",
"https://ics-cert.us-cert.gov/alerts/alerts.xml")
);
private String currentEmail;
private String currentFeed;
private String currentWord;
public void addEmail() {
emails.add(currentEmail);
}
<!-- EMAILS -->
<h3>Configured Emails</h3>
<h:form>
<h:inputText value="#{Application.currentEmail}" var="email"/>
<h:commandButton value="Add Email" action="#{Application.addEmail}"/>
</h:form>
<h:form>
<ui:repeat var="email" value="#{Application.emails}">
<tr>
<td>#{email}</td>
<td>
<f:facet name="header">Action</f:facet>
<h:commandLink value="Delete" action="#{Application.rmEmail(email)}"/>
</td>
</tr>
<br></br>
</ui:repeat>
</h:form>