struts 一与struts 2对比

struts 1与struts 2对比

1.配置文件名称与目录位置

(1)struts1配置文件在/web-inf/*-config.xml

对应的web.xml配置方式为

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app id="WebApp_1260152591189">

<servlet>
        <servlet-name>action</servlet-name>
        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>2</param-value>
        </init-param>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml,/WEB-INF/yohey-config.xml</param-value>
        </init-param>
<init-param>
            <param-name>detail</param-name>
            <param-value>2</param-value>
        </init-param>
        <init-param>
            <param-name>locale</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>validate</param-name>
            <param-value>true</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>


    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
         <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

</web-app>

(2)struts2配置文件在/src/struts.xml

对应的web.xml配置方式为

<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

2.action编写的规范不同

（1）struts1需要为页面form指定对应的ActionForm,并在*-config.xml中的 <form-beans>与<action-mapping>中匹配；

<action-mappings type="org.apache.struts.action.ActionMapping">

(2)struts2摒弃了ActionForm与Action处理方法分开的特点，以及可以为action处理方法命多个名，这样在struts.xml文件中<action name="a" class="com.test.action.LoginAction" method="a">可以直接指定到“LoginAction类”的“a”方法为动作

<struts>
<constant name="struts.i18n.encoding" value="UTF-8" />
<constant name="struts.multipart.parser" value="jakarta" />
<constant name="struts.multipart.maxSize" value="10485760" />

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


<package name="struts2" extends="struts-default">

  <action name="login" class="com.test.action.LoginAction">
   <result name="input">/login2.jsp</result>
   <result name="success">/result.jsp</result>
   <result name="failer">/login2.jsp</result>

  </action>

  <action name="a" class="com.test.action.LoginAction" method="a">
   <result name="success">/input.jsp</result>
   <result name="input">/login2.jsp</result>
  </action>

  <action name="pointConverter" class="com.test.action.PointAction">
   <result name="success">/output.jsp</result>
  </action>
</package>
</struts>

3.页面的调用URL地址

(1)都可以为test.do?doing=login&name=aaa这样的形式；但现在知道的struts2中支持自定义名称的action servlet类处理方法，所以可以采用这样的调用方式test!login.do&name=aaa(提交到test名对应的class处理方法login)

(2)在Action类中

struts1必须继承org.apache.struts.action.Action，处理的方法只有一个public ActionForward perform(ActionMapping actionMapping, ActionForm form, HttpServletRequest request, HttpServletResponse response){return actionMapping.findForward("errorPage");}

而struts2完全提供轻量级框架思想，可以不继承任何struts框架的基类，处理的方法可以自定义名称；

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