Spring学习02之登录。注册。传参

1.新建项目hellospring

2.new index.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!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=GB18030">
<title>Insert title here</title>
</head>
<body>
This is my JSP page!
	
	没注册的用户，请<a href="index/qingqiuregister">注册</a>!
	<br> 
	已注册的用户，请<a href="index/qingqiulogin">登录</a>!
</body>
</html>

3.引入jar包

4.配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>hellospring</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
    <!--部署DispatcherServlet-->
  <!-- //servlet  一级，二级 -->
<servlet>
<!-- //找第二个配置文件 springmvc-servlet.xml-->
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    
</servlet> 
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

5.配置springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    	http://www.springframework.org/schema/beans 
    	http://www.springframework.org/schema/beans/spring-beans.xsd
    	    	http://www.springframework.org/schema/context
    	    	http://www.springframework.org/schema/context/spring-context.xsd"> 
<!-- ch2哪个请求交给哪个类的哪个函数 -->
<context:component-scan base-package="controller"/>

<!-- 视图解析 -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>

</bean>
</beans>

6.编写控制类IndexController

package controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping(value="/index")
public class IndexController {
	
	
		//功能点：主注册、登录、增删查改
		@RequestMapping(value="/qingqiulogin")
	    public String login(HttpSession  session,HttpServletRequest request) {
		//打开登录页
			session.setAttribute("key1", "请登录");
			request.setAttribute("key2", "促销活动");
	    	return "login";
	}
		@RequestMapping(value="/qingqiuregister")
	   public String register(Model model){
		
		model.addAttribute("keym","注册的提示信息");
			//打开登录页
		    	return "register";
		}
	}

7.写UserController

package controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping(value="/user")
public class UserController {
//p24
	@RequestMapping(value="/regsubmit")
	  // public String register(User user,Model model){
		//   if("liuxin".equals(user.getUsername()) &&"123456".equals(user.getPassword())) {
			   public String register(String username,String password,Model model) {
					if(username!="" &&password!=""){
						model.addAttribute("username",username);
			   System.out.println("User_Controller.register() success");
			return  "login";//注册成功，登录
			}
		   else {
			  // model.addAttribute("username",user.getUsername());//失败，回退
			   model.addAttribute("username",username);//失败，回退
			   System.out.println("User_Controller.register() fail");
			return "register";
		}
	   }
		
		
	}

8.register.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!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=GB18030">
<title>Insert title here</title>
</head>
<body>
<form action="user/regsubmit" method="post">
这是注册表单页面
<br><br>
<h1>ch1</h1>
    username:<input type="text" name="username"><br><br>
    password:<input type="password" name="password"><br><br>
    passwordAgain:<input type="password" name="password02"><br><br>
    <br>
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
   <input type="submit" value="注册">
</form>
<br>
<h1>ch2</h1>
EL表达式
<%=request.getAttribute("keym") %><br>
-------
name:
<%=request.getAttribute("username") %>
</body>
</html>

运行截图

Spring学习02之登录。注册。传参

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