struts-Result- Configuration

When an action class method completes, it returns a String. The value of the String is used to select a result element. An action mapping will often have a set of results representing different possible outcomes. A standard set of result tokens are defined by the ActionSupport base class.

action执行完，会返回一个string类型的数据，这个数据用于选择result element。

result：标准的配置集合已在action接口中定义：

String SUCCESS = "success";
String NONE    = "none";
String ERROR   = "error";
String INPUT   = "input";
String LOGIN   = "login";

A special 'other' result can be configured by adding a result with name="*". This result will only be selected if no result is found with a matching name.

<action name="Hello">
    <result>/hello/Result.jsp</result>
    <result name="error">/hello/Error.jsp</result>
    <result name="input">/hello/Input.jsp</result>
    <result name="*">/hello/Other.jsp</result>
</action>

注：（1）“*”并不是通配模式，而是如果找不到相应的name，就会选择name=*

（2）在大部分情况下，如果找不到相应的name，就会抛出错误