2.Struts采用EL保持表单数据:ActionForm

package com.bjpowernode.struts;import org.apache.struts.action.ActionForm;/** * 登录ActionForm，负责表单收集数据 * 表单的属性必须和ActionForm中的get和set的属性一致 * @author Administrator * */@SuppressWarnings("serial")public class LoginActionForm extends ActionForm {private String username;private String password;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}