七 Struts2访问Servlet的API方式二：原生方式

前端jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

<h1>Struts2访问Servlet的PAI</h1>
<h3>方式二：使用原生方式访问</h3>
<form action="${pageContext.request.contextPath }/requestDemo2.action" method="post">
   姓名：<input type="text" name="name" /><br/>
   密码：<input type="password" name="password"/><br/>
      <input type="submit" value="提交" >
</form>
</body>
</html>

Action类：

package com.itheima.struts2.demo1;

import java.util.Arrays;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
/**
 * 访问Setvlet方式2：原生方式（推荐）
 * 
 */
public class RequestDemo2 extends ActionSupport {
    //一、接受数据  
    public String execute() throws Exception{
        //直接获取request对象：ServletActionContext
        HttpServletRequest request = ServletActionContext.getRequest();
        Map<String,String[]> map = request.getParameterMap();
        for (String key : map.keySet()) {
            String[] values = map.get(key);
            System.out.println(key+"  "+Arrays.toString(values));
        }
        //向域对象保存数据，向request,session,application保存数据
        request.setAttribute("reqName", "reqValue");
        request.getSession().setAttribute("sessName", "sessValue");
        ServletActionContext.getServletContext().setAttribute("appName", "appValue");
        return SUCCESS;
      }
}

配置文件：

<?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>
         <package name="demo1" extends="struts-default" namespace="/">
         <action name="requestDemo2" class="com.itheima.struts2.demo1.RequestDemo2" method="">
         <result name="success">/demo1/demo2.jsp</result>
         </action>
         
         </package> 
          
</struts>

成功跳转页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>显示数据</title>
</head>
<body>
<h1>显示数据</h1>
${reqName }
${sessName }
${appName }
</body>
</html>

七 Struts2访问Servlet的API方式二：原生方式

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