SpringMVC03----用形参接受参数

1.新建项目springch202

2.建立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>my spring</title>
</head>
<body>
	index.jsp
	<br> 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.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>springch202</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>
  <!-- //找第二个配置文件 springmvc-servlet.xml-->
  <servlet>
    <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>

//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="/WEB-INF/lx/"></property>
<property name="suffix" value=".jsp"></property>

</bean>
</beans>

4.建立控制类

package controller;



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() {
		//打开登录页
			
	    	return "login";
	}
		@RequestMapping(value="/qingqiuregister")
	   public String register(Model model){
		
		
			//打开注册页
		    	return "register";
		}
	}

package controller;

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

/*
 * /user/register?username=&userpw=&repw=
 */
@Controller
@RequestMapping("/user")
public class UserController {
	@RequestMapping("/register")
	//形参接受:一对一接受，同名
	public String register(String username,String userpw,Model model){
		//业务处理
		if("liuxin".equals(username)&&"123".equals(userpw)){
			return "login";
		}
		else{
			//提交失败，回退
			//存放
			model.addAttribute("username",username);
			model.addAttribute("userpw",userpw);
			model.addAttribute("tap","提交失败");
			//跳转
			return"register";
		}
		
	
	}
}

5.建立login.jsp&register.jsp(在WEB-INF下放入一个包里，比较整齐与安全)

<%@ 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>
登录
</body>
</html>

<%@ 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>
注册<br>
Spring 2.2.2 用形参接受参数
<br>View p26
<br>配置xml
<br>controller
<form action="user/register">
name<input name="username" value="${username }"/><br><!-- 读取Model中临时数据，当填错时值可以保留 -->
password<input name="userpw" value="${userpw }"/><br>
repw<input name="repw"/><br>
<input type="submit"/>
</form>
name:<%=request.getAttribute("username") %>
<%=request.getAttribute("tap") %><br>

View用el读取，p26<br>
提示：${tap }///name:${username }
</body>
</html>

SpringMVC03----用形参接受参数

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