struts2-拦截器（一）

struts2-拦截器（一）

1、这里介绍的action拦截器，后续还会介绍方法拦截器。对于action拦截器，需要继承AbstractInterceptor类，并且重写intercept方法。下面是拦截器的代码：
SimpleInterceptor.java

package com.xueyoucto.random;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

import java.util.Date;

/**
* Created by Administrator on 2016/6/19.
*/
public class SimpleInterceptor extends AbstractInterceptor{
private String name;

public void setName(String name) {
this.name = name;
}

@Override
public String intercept(ActionInvocation actionInvocation) throws Exception {
ttAction t = (ttAction)actionInvocation.getAction();
System.out.println(name+"拦截器执行开始" + new Date());
String result= actionInvocation.invoke();
System.out.println(name+"拦截器执行完毕"+ new Date());
return result;
}
}

ttAction.java

package com.xueyoucto.random;

import com.opensymphony.xwork2.ActionSupport;

/**
* Created by Administrator on 2016/6/19.
*/
public class ttAction extends ActionSupport {
private String name;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String execute(){
System.out.println(name);
return ActionSupport.SUCCESS;
}

}

Strut2.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

<constant name="struts.enable.DynamicMethodInvocation" value="false"/>
<constant name="struts.devMode" value="true"/>

<package name="xueyoupackage" namespace="/" extends="struts-default">
<interceptors>
<interceptor name="mySimple" class="com.xueyoucto.random.SimpleInterceptor">
<param name="name">简单拦截器</param>
</interceptor>
</interceptors>
<action name="aa">
<result>/WEB-INF/content/aa.jsp</result>
</action>
<action name="bb" class="com.xueyoucto.random.ttAction">
<interceptor-ref name="defaultStack"></interceptor-ref>
<interceptor-ref name="mySimple">
<param name="name">修改简单拦截器名字1</param>
</interceptor-ref>
<result>/WEB-INF/content/bb.jsp</result>
<interceptor-ref name="mySimple">
<param name="name">修改简单拦截器名字2</param>
</interceptor-ref>
<result>/WEB-INF/content/bb.jsp</result>
</action>
</package>
</struts>

运行结果：