01.创建登录界面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form action="user/login" method="post"> <table> <tr> <td>用户名：</td> <td><input type="text" name="name"/></td> </tr> <tr> <td>密码：</td> <td><input type="password" name="password"/></td> </tr> <tr> <td></td> <td><input type="submit" value="登录"/></td> </tr> </table> </form> </body> </html>
02.配置struts.xml文件
<?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> <constant name="struts.devMode" value="true"/> <package name="default" namespace="/user" extends="struts-default"> <action name="login" class="cn.bdqn.action.UserAction" method="login"> <result>/success.jsp</result> </action> </package> </struts>
03.创建对应的UserAction
package cn.bdqn.action; import java.util.Map; import javax.servlet.ServletContext; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 用户登录的action * jsp九大内置对象 * * out * page * pageContext * request * response * session * application * config * exception */ public class UserAction extends ActionSupport{ /** public String login(){ 获取前台的值 01.耦合方式 不推荐使用 String name = ServletActionContext.getRequest().getParameter("name"); String password = ServletActionContext.getRequest().getParameter("password"); System.out.println(name); System.out.println(password); //放入作用域 ServletActionContext.getRequest().setAttribute("name",name); ServletActionContext.getRequest().setAttribute("password",password); return SUCCESS; }*/ /** * 登录的方法 02. 解耦两种方法 001. 使用ActionContext! sturts2在底层把我们的request,session,application用Map集合保存起来了！ */ private String name; private String password; public String login(){ Map<String, Object> request=(Map<String, Object>) ActionContext.getContext().get("request"); //让success.jsp获取数据 request.put("name",name);// 等同于setAttribute("name",name); request.put("password",password); return SUCCESS; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
04.使用第二种解耦的方式 ，就是实现对应的Aware接口
import org.apache.struts2.interceptor.RequestAware; import com.opensymphony.xwork2.ActionSupport; /** * 实现对应的Aware接口 */ public class UserAction2 extends ActionSupport implements RequestAware{ private String name; private String password; private Map<String, Object> request; //并不用写 set和get //登录的方法 public String login(){ request.put("name",name); request.put("password",password); return SUCCESS; } //重写方法 给请求request赋值 @Override public void setRequest(Map<String, Object> request) { this.request=request; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
05.success.jsp
===============el表达式获取数据=============<br/> ${name} ${password} <br/> ===============struts2标签获取数据=============<br/> <s:property value="password"/> <%--值栈中获取的 --%> <s:property value="#request.password"/> <%--栈的上下文中获取的 --%> <s:property value="#attr.password"/>