Struts2初步

1、将Struts2的基本jar包拷到工程的lib目录中

2、配置web.xml，加载Struts2的过滤器

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
        </filter-class>

    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

3、加载Struts的配置文件Struts.xml到src目录

<?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>
    <!-- struts常量 -->
    <constant name="struts.i18n.encoding" value="UTF-8"></constant>
    <constant name="struts.action.extension" value="action,,"></constant>
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="true" />
    <constant name="struts.configuration.xml.reload" value="true"></constant>
    <constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant>

    <package name="default" namespace="/" extends="struts-default">

    </package>

</struts>

4、开发Struts中的Action类，类中必须有execute方法

5、第一个Action

Java代码：

package com.action;

public class FirstAction {
    public String execute(){
        System.out.println("hello Strust2!");
        return null;
    }
}

Struts.xml

    <package name="default" namespace="/" extends="struts-default">
        <action name="FirstAction" class="com.action.FirstAction"></action>
    </package>

jsp页面

<a href="<%=path %>/FirstAction" >hello Struts2</a>