我有一个联系表单,并且有一些通过 Bean 验证进行验证的字段,提交后如何返回 Bean 验证错误消息?
例如:
<h:form>
<h:inputText id="name" value="#{contact.client.name}"></h:inputText>Name (Required)
<h:inputText id="email" value="#{contact.client.email}"></h:inputText>E-Mail (Required)
<h:inputText id="website" value="#{contact.client.website}"></h:inputText>Website (Optional)
<h:inputText id="text" value="#{contact.client.text}"></h:inputText>Message (Required):
<h:commandButton value="Send" action="#{contact.sendMessage}" >
<f:ajax execute="@form" render="@form"/>
</h:commandButton>
</h:form>
这就是我验证字段的方式:
// Client.java (model)
@NotNull(message="Please provide your name")
private String name;
@NotNull(message="Please provide your email")
@Pattern(regexp = "([^.@]+)(\\.[^.@]+)*@([^.@]+\\.)+([^.@]+)", message = "Invalid e-mail")
private String email;
@Pattern(regexp = "(http[s]?://|ftp://)?(www\\.)?[a-zA-Z0-9-\\.]+\\.([a-zA-Z]{2,5})$", message = "Not valid URL")
private String website;
@NotNull(message="Please provide your message")
private String text;
要么使用<h:message> http://download.oracle.com/javaee/6/javaserverfaces/2.1/docs/vdldocs/facelets/h/message.html您可以通过以下方式将其附加到特定组件for
应该引用的属性id
输入组件的:
<h:inputText id="name" value="#{contact.client.name}"></h:inputText>Name (Required)
<h:message for="name" />
<h:inputText id="email" value="#{contact.client.email}"></h:inputText>E-Mail (Required)
<h:message for="email" />
<h:inputText id="website" value="#{contact.client.website}"></h:inputText>Website (Optional)
<h:message for="website" />
<h:inputText id="text" value="#{contact.client.text}"></h:inputText>Message (Required):
<h:message for="text" />
or use <h:messages/> http://download.oracle.com/javaee/6/javaserverfaces/2.1/docs/vdldocs/facelets/h/messages.html将它们全部显示在一个地方:
<h:messages />
是的,bean 验证消息也在那里结束。
不要忘记确保按钮的render
属性也涵盖了它们。
也可以看看:
- 使用 Glassfish 和 Eclipse 的 JSF 2.0 教程 - Hello World - 视图 http://balusc.blogspot.com/2011/01/jsf-20-tutorial-with-eclipse-and.html#CreateJSFHelloWorldInEclipseTheView
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