框架之Stucts2篇----day3.1

因爲涉及到畢設問題，所以提前進入框架部分。

Struts2

1.1入門demo

1.配置struts2環境

2.web.xml
`

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name></display-name> 
  <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>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>`

3.具體業務邏輯

4.struts2.xml

`<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">

<struts>
    <package name="hello" extends="struts-default">
        <action name="hello" class="com.it.hello.HelloWorld">
            <result name="success">index.jsp</result>
        </action>
    </package>
</struts>`

首先，配置struts2的核心過濾器web.xml，過濾URL請求，接着配置struts.xml文件,讓具體的操作映射到具體類中。

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