springMVC传值方式

一、概述。

在很多企业的开法中常常用到SpringMVC+Spring+Hibernate（mybatis）这样的架构，SpringMVC相当于Struts是页面到Contorller直接的交互的框架也是界面把信息传输到Contorller层的一种架构，通过这个架构可以让我们把页面和Contorller层解耦，使得开发人员的分工更加明确。

二、代码演示。

1、首先配置SpringMVC环境。

1.1导入jar。

springMVC传值方式

值得注意的是红色标记的commons-logging这个jar包一定得引入进去不然会报错。

1.2、xml配置文件。
web.xml

[html] view plain copy print ?

springMVC传值方式

springMVC传值方式

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

<servlet>

        <servlet-name>springMVC</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>springMVC</servlet-name>

        <url-pattern>*.spring</url-pattern>

    </servlet-mapping>

    <welcome-file-list>

        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>

</web-app>
<?xml version="1.0" encoding="UTF-8"?>
		<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
		<servlet>
				<servlet-name>springMVC</servlet-name>
				<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
				<load-on-startup>1</load-on-startup>
			</servlet>
			<servlet-mapping>
				<servlet-name>springMVC</servlet-name>
				<url-pattern>*.spring</url-pattern>
			</servlet-mapping>
			<welcome-file-list>
				<welcome-file>index.jsp</welcome-file>
			</welcome-file-list>
		</web-app>
           
springMVC-servlet.xml

[html] view plain copy print ?

springMVC传值方式

springMVC传值方式

<?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-3.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <context:component-scan base-package="com.gaowei.controller" />

</beans>
<?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-3.0.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<context:component-scan base-package="com.gaowei.controller" />
</beans>
           

2、前台界面代码。

login.jsp

[plain] view plain copy print ?

springMVC传值方式

springMVC传值方式

<%@ 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>

<form action="login.spring" method="post">

    username:<input type="text" name="username">

    <br/>

    password:<input type="text" name="password">

    <br/>

    <input type="submit" value="登录">

</form>

</body>

</html>
<%@ 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>
<form action="login.spring" method="post">
	username:<input type="text" name="username">
	<br/>
	password:<input type="text" name="password">
	<br/>
	<input type="submit" value="登录">
</form>
</body>
</html>
           
No.jsp

[html] view plain copy print ?

springMVC传值方式

springMVC传值方式

<%@ 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>

No!

</body>

</html>
<%@ 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>
No!
</body>
</html>
           
Ok.jsp

[html] view plain copy print ?

springMVC传值方式

springMVC传值方式

<%@ 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>

OK！ welcome:${username}

</body>

</html>
<%@ 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>
 OK！ welcome:${username}
</body>
</html>
           

3、Contorller层接收前台的两种方式。

方式一：
利用@RequestParam这个注解

[java] view plain copy print ?

springMVC传值方式

springMVC传值方式

package com.gaowei.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

@Controller

public class Login {

    //方式一

    @RequestMapping("/login")

    public String login(@RequestParam("username") String username,

                        @RequestParam("password") String password,Model model){

        if (username.equals(password))

        {

            model.addAttribute("username", username);

            return "ok.jsp";

        } else {

            return "no.jsp";

        }

    }

}
package com.gaowei.controller;
	
	import org.springframework.stereotype.Controller;
	import org.springframework.ui.Model;
	import org.springframework.web.bind.annotation.RequestMapping;
	import org.springframework.web.bind.annotation.RequestParam;
	
	@Controller
	public class Login {
	
		//方式一
		@RequestMapping("/login")
		public String login(@RequestParam("username") String username,
							@RequestParam("password") String password,Model model){
			if (username.equals(password)) 
			{
				model.addAttribute("username", username);
				return "ok.jsp";
			} else {
				return "no.jsp";
			}
		}
	}
           
方式二：

[java] view plain copy print ?

springMVC传值方式

springMVC传值方式

package com.gaowei.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

@Controller

public class Login {

@RequestMapping("/login")

    public String login(String username,String password,Model model){

        if (username.equals(password))

        {

            model.addAttribute("username", username);

            return "ok.jsp";

        } else {

            return "no.jsp";

        }

    }

}
package com.gaowei.controller;
	
	import org.springframework.stereotype.Controller;
	import org.springframework.ui.Model;
	import org.springframework.web.bind.annotation.RequestMapping;
	import org.springframework.web.bind.annotation.RequestParam;
	
	@Controller
	public class Login {
	@RequestMapping("/login")
		public String login(String username,String password,Model model){
			if (username.equals(password)) 
			{
				model.addAttribute("username", username);
				return "ok.jsp";
			} else {
				return "no.jsp";
			}
		}
	
	}
           

4、界面结果。

第一种传值方式：

springMVC传值方式

springMVC传值方式
第二种传值方式：

springMVC传值方式

三、总结。

这里体现出了SpringMVC传值方式的多样性满足了开发人员的不同需求。第一种用来表单的提交。第二种用来界面间相互传值，也为了方便开发人员利用AJAX。

springMVC传值方式

继续阅读

【Spring】解决SpringTask定时执行两次问题

springMVC实现JSON交互

配置springmvc返回json格式数据

springmvc返回json数据（零配置方式）

jquery,ajax,jsonp例子+springmvc后台

SpringMVC(六) | 前后端交互之ajax与jsonjsonajax

SpringMVC之ajax异步交互

Spring MVC 自学杂记（五） -- SpringMVC与前台的json数据交互

SpringMVC ----Json的简单交互处理Json的介绍JSON 和 JavaScript 对象互转Controller返回JSON数据

SpringMvc与前端交互的数据转递（ajax）一、text类型数据二、json类型数据

springMvc如何和前端页面交互，传输json数据springMvc和前端传输数据

spingmvc 文件上传一、单文件上传二、多文件上传

spingmvc实现附件单个和打包下载

SpringMVC返回json数据的三种方式

SpringMVC常见注释的简述

SSM框架（二）------------表现层的SpringMVC