ValidationMessage (Java EE 5)

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javax.servlet.jsp.tagext Class ValidationMessage

java.lang.Object
  javax.servlet.jsp.tagext.ValidationMessage

public class ValidationMessage
extends Object

来自 TagLibraryValidator 或 TagExtraInfo 的验证消息。

从 JSP 2.0 起，JSP 容器必须支持 jsp:id 属性，以提供更高质量的验证错误。容器将跟踪传递给容器的 JSP 页面，将给每个元素分配唯一的 "id"，该 id 作为 jsp:id 属性的值传递。XML 视图中每个可用的 XML 元素都将使用此属性扩展。然后，TagLibraryValidator 可以在一个或多个 ValidationMessage 对象中使用该属性。然后，容器可以依次使用这些值提供有关错误位置的更准确信息。

id 属性的实际前缀不一定是 jsp，但它总是映射到名称空间 http://java.sun.com/JSP/Page。TagLibraryValidator 实现必须依赖 id 属性的 uri 而不是前缀。

英文文档：

A validation message from either TagLibraryValidator or TagExtraInfo.

As of JSP 2.0, a JSP container must support a jsp:id attribute to provide higher quality validation errors. The container will track the JSP pages as passed to the container, and will assign to each element a unique "id", which is passed as the value of the jsp:id attribute. Each XML element in the XML view available will be extended with this attribute. The TagLibraryValidator can then use the attribute in one or more ValidationMessage objects. The container then, in turn, can use these values to provide more precise information on the location of an error.

The actual prefix of the id attribute may or may not be jsp but it will always map to the namespace http://java.sun.com/JSP/Page. A TagLibraryValidator implementation must rely on the uri, not the prefix, of the id attribute.

Constructor Summary
`ValidationMessage(String id, String message)` Create a ValidationMessage.

Method Summary
`String`	`getId()` Get the jsp:id.
`String`	`getMessage()` Get the localized validation message.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

public ValidationMessage(String id, String message)
创建 ValidationMessage。消息 String 应该是非 null 的。如果消息不是特定于任何 XML 元素的，或者没有传递 jsp:id 属性，则 id 值可以为 null。如果 id 值是非 null 的，则 id 值必须是传入 validate() 方法的 PageData 的 jsp:id 属性值。

id 该参数为 null 或者 jsp:id 属性的值。

message 本地化验证消息。

英文文档：
ValidationMessage

public ValidationMessage(String id,
                         String message)

Create a ValidationMessage. The message String should be non-null. The value of id may be null, if the message is not specific to any XML element, or if no jsp:id attributes were passed on. If non-null, the value of id must be the value of a jsp:id attribute for the PageData passed into the validate() method.