Strust2 引文(Annotation)的使用

Strust2 注解(Annotation)的使用
步骤:
1.导入Struts的jar包,红色标注的为注解必须要用的包
           commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
freemarker-2.3.15.jar
ognl-2.7.3.jar
struts2-codebehind-plugin-2.1.8.1.jar
struts2-core-2.1.8.1.jar
xwork-core-2.1.6.jar


2.配置web.xml过滤器,红色为必须注意的地方.不用注解的过滤器可以忽略此段内容.初始化的名字(actionPackages)固定不变.value(com.meiyoudao)为你写的action类所在的包路径.过滤器会根据此内容去找匹配的action类.多个包用,号分隔.
<init-param>
<param-name>actionPackages</param-name>
<param-value>com.meiyoudao</param-value>
</init-param>

<filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class><init-param><param-name>actionPackages</param-name><param-value>com.meiyoudao</param-value></init-param></filter><filter-mapping><filter-name>struts2</filter-name><url-pattern>/*</url-pattern></filter-mapping>

3.写Action类,继承ActionSupport类.注意两个类的名称和所访问的URL的区别
代码实例,访问的RUL为:http://localhost/站点名称/ok.action

package com.meiyoudao;import org.apache.struts2.config.Namespace;import org.apache.struts2.config.Result;import com.opensymphony.xwork2.ActionSupport;@Namespace("/")@Result(name = "SUCCESS", value = "/index1.jsp")public class OkAction extends ActionSupport {@Overridepublic String execute() throws Exception {System.out.println("================");return "SUCCESS";}}

代码实例,访问的RUL为:http://localhost/站点名称/haha.action

package com.meiyoudao;import org.apache.struts2.config.Result;import com.opensymphony.xwork2.ActionSupport;@Result("/index.jsp")public class Haha extends ActionSupport {@Overridepublic String execute() throws Exception {System.out.println("+++++++++++++");return "success";}}

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