5.Struts采用EL保持表单数据:struts-config.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts-config PUBLIC          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd"><struts-config><form-beans><form-bean name="loginForm" type="com.bjpowernode.struts.LoginActionForm"/></form-beans><action-mappings><action path="/login" type="com.bjpowernode.struts.LoginAction"name="loginForm" scope="request" input="/login.jsp"><forward name="success" path="/login_success.jsp" /></action><action path="/login_input"forward="/login.jsp"></action></action-mappings></struts-config>