struts注解@Result是否应该只在class级别？

Question

我正在阅读 Struts2 文档，发现其文档中存在某种矛盾。在这个linkhttps://struts.apache.org/docs/convention-plugin.html

The Convention plugin allows action classes to define different results for an action. Results fall into two categories, global and local. Global results are shared across all actions defined within the action class. These results are defined as annotations on the action class. Local results apply only to the action method they are defined on

然而，在另一个link、https://struts.apache.org/docs/result-annotation.html中建议：

The @Result annotation lives at the Action class level and not the method level. This matches what is found in an XML-based Action configuration. Do not be tempted to annotate your Action's methods; it will not work.

那么哪个是正确的？ @Result可以在方法级别定义吗？

Answer 1

使用 @Action 属性将本地结果配置为操作配置。换句话说，本地结果是在允许的地方配置的。使用 @Action 注释指定属性 results 列表。您可以在此处添加 @Result 注释。

Dave Newton 的书有一段摘录"Apache Struts 2 Web Application Development":

We can also configure results with Convention's annotations. We don't have to rely on the Convention plug-in's idea of what our result JSP files should be named. We can define results manually using the @Result annotation, and the @Results annotation if we need multiple results. (We can use the @Results annotation only at the class level, while the @Action and @Actions annotations are available at the method level. We can define multiple results at the action level via the @Action annotation's results property.)

wiki 定义也正确

Global results are shared across all actions defined within the action class. These results are defined as annotations on the action class. Local results apply only to the action method they are defined on. Here is an example of the different types of result annotations:

com.example.actions.HelloWorld
package com.example.actions;

import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Actions;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;

@Results({
  @Result(name="failure", location="fail.jsp")
})
public class HelloWorld extends ActionSupport {
  @Action(value="/different/url",
    results={@Result(name="success", location="http://struts.apache.org", type="redirect")}
  )
  public String execute() {
    return SUCCESS;
  }

  @Action("/another/url")

  public String doSomething() {
    return SUCCESS;
  }
}

struts注解@Result是否应该只在class级别？

Should struts annotation @Result only be in class level or not?

java

configuration

struts2

struts2-convention-plugin

struts-action

com.example.actions.HelloWorld