简单的Maven+SpringMVC

一、SpringMVC非注解编程

1：修改pom.xml文件（相当于非Maven项目的导入jar包）

　　 <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->

    <dependency>

        <groupId>org.springframework</groupId>

        <artifactId>spring-webmvc</artifactId>

        <version>4.2.5.RELEASE</version>

    </dependency>

2：修改配置文件web.xml为以下代码

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

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <display-name></display-name>

<servlet>

      <servlet-name>springmvc</servlet-name>

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

      <init-param>

          <param-name>contextConfigLocation</param-name>

          <param-value>classpath:springmvc-config.xml</param-value>

      </init-param>

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

  </servlet>

   <servlet-mapping>

      <servlet-name>springmvc</servlet-name>

      <url-pattern>/</url-pattern>

  </servlet-mapping>

</web-app>

3：在src/main/resources下面创建springmvc-config.xml文件

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

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

        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

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

        http://www.springframework.org/schema/context/spring-context-3.2.xsd

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

        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

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

        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

       <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />

       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" />

       <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />

       <bean name="/hello" class="com.gx.controller.HelloController"/>

</beans>

4：在src/main/java里面创建com.gx.controller.HelloController

package com.gx.controller;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.Controller;

public class HelloController implements Controller{

    @Override

    public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response)throws Exception{

        System.out.println("handleRequest is working ......");

        String myGetMess = request.getParameter("mess");

        System.out.println("what I get is "+myGetMess);

        ModelAndView mv = new ModelAndView();

        mv.addObject("message" , "hello , this is my springmvc");

        mv.setViewName("/index.jsp");

        return mv;

    }

}

5：在webapp下面创建跳转页面index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"

    pageEncoding="ISO-8859-1"%>

<!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=ISO-8859-1">

<title>Insert title here</title>

</head>

<body>

${requestScope.message}

</body>

</html>

6：在页面输入网址

http://localhost:8888/testSystem/hello?mess="123"

7：页面信息

8：控制台信息

二、SpringMVC注解编程

1：修改pom.xml文件（相当于非Maven项目的导入jar包）

<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->

    <dependency>

        <groupId>org.springframework</groupId>

        <artifactId>spring-webmvc</artifactId>

        <version>4.2.5.RELEASE</version>

    </dependency>

2：修改配置文件web.xml为以下代码

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

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <display-name></display-name>

<servlet>

      <servlet-name>springmvc</servlet-name>

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

      <init-param>

          <param-name>contextConfigLocation</param-name>

          <param-value>classpath:springmvc-config.xml</param-value>

      </init-param>

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

  </servlet>

   <servlet-mapping>

      <servlet-name>springmvc</servlet-name>

      <url-pattern>/</url-pattern>

  </servlet-mapping>

</web-app>

3：在src/main/resources下面创建springmvc-config.xml文件

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

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

        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

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

        http://www.springframework.org/schema/context/spring-context-3.2.xsd

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

        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

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

        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

       <!--

       非注解编程的配置文件

       <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />

       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" />

       <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />

       <bean name="/hello" class="com.gx.controller.HelloController"/>

        -->

       <!-- spring会自动扫描 base-package 下面的包或者java文件 -->

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

       <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />

       <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" />

       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" />    

</beans>

4：在src/main/java里面创建com.gx.controller.HelloController

package com.gx.controller;

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

import org.springframework.web.servlet.ModelAndView;

import org.springframework.stereotype.Controller;

//public class HelloController implements Controller{

@Controller

public class HelloController{

    //public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response)throws Exception{

    @RequestMapping(value="/hello")

    public ModelAndView useNote(){

        System.out.println("method useNote in controller HelloController is working ......");

        ModelAndView mv = new ModelAndView();

        mv.addObject("message" , "hello , this is my springmvc");

        mv.setViewName("/index.jsp");

        return mv;

    }

}

5：在webapp下面创建跳转页面index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"

    pageEncoding="ISO-8859-1"%>

<!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=ISO-8859-1">

<title>Insert title here</title>

</head>

<body>

${requestScope.message}

</body>

</html>

6：在页面输入网址

http://localhost:8888/testSystem/hello

7：页面信息

8：控制台信息

三、注册编程获取页面值并跳转

（3.1）ModelAndView

1：在“二”的基础上添加com.gx.model.User

package com.gx.model;

public class User {

    String username;

    String password;

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

    @Override

    public String toString() {

        return "User [username=" + username + ", password=" + password + "]";

    }

}

2：创建com.gx.controller.Controller1

package com.gx.controller;

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

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

import org.springframework.web.servlet.ModelAndView;

import com.gx.model.User;

import org.springframework.stereotype.Controller;

@Controller

public class Controller1{

    @ModelAttribute

    public void useModelAndView(String name,String password,ModelAndView mv){

        System.out.println("useModelAndView in Controller1 is working......");

        User user = new User();

        user.setPassword(password);

        user.setUsername(name);

        mv.addObject("user",user);

    }

    @RequestMapping(value="/login1")

    public ModelAndView login(ModelAndView mv){

        System.out.println("login in Controller1 is working......");

        User user = (User)mv.getModel().get("user");

        System.out.println(user);

        //跳转到welcome.jsp

        mv.setViewName("/welcomePage.jsp");

        return mv;

    }

}

3：创建index.jsp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>Insert title here</title>

</head>

<body>

<form action="login1" method="post">

请输入用户名

<input type="text" name="name" />

请输入密码

<input type="password" name="password" />

<input type="submit" value="登录" />

</form>

</body>

</html>

4：创建welcomPage.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>

${requestScope.user.username}，欢迎！！

</body>

</html>

5：在页面输入网址

6：点击登录之后的页面信息

7：控制台信息

（3.2）ModelMap

1：在（3.1）的基础上创建com.gx.controller.Controller2

package com.gx.controller;

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

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

import com.gx.model.User;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

@Controller

public class Controller2{

    @ModelAttribute

    public void useModelMap(String name,String password,ModelMap modelMap){

        System.out.println("useModelMap in Controller2 is working......");

        User user = new User();

        user.setPassword(password);

        user.setUsername(name);

        modelMap.addAttribute("user",user);

    }

    @RequestMapping(value="/login2")

    public String login(ModelMap modelMap){

        System.out.println("login in Controller2 is working......");

        /*

         * 在Controller1里面

         * User user = (User)mv.getModel().get("user");

         */

        User user = (User)modelMap.get("user");

        System.out.println(user);

        /*

         * 在Controller1里面跳转到welcome.jsp

         * mv.setViewName("/welcomePage.jsp");

         * return mv;

         */

        //跳转到welcome.jsp

        return "welcomePage.jsp";

    }

}

2：修改index.jsp里面form表单action为login2

3：在页面输入网址

4：点击确定之后页面信息

5：控制台信息

（3.3）Model

1：在（3.1）的基础上创建com.gx.controller.Controller3

package com.gx.controller;

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

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

import com.gx.model.User;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

@Controller

public class Controller3{

    @ModelAttribute

    public void useModel(String name,String password,Model model){

        System.out.println("useModel in Controller3 is working......");

        User user = new User();

        user.setPassword(password);

        user.setUsername(name);

        model.addAttribute("user",user);

    }

    @RequestMapping(value="/login3")

    public String login(Model model){

        System.out.println("login in Controller3 is working......");

        /*

         * 在UseModelController1里面

         * User user = (User)mv.getModel().get("user");

         * 在UseModelController2里面

         * User user = (User)modelMap.get("user");

         */

        User user = (User)model.asMap().get("user");

        System.out.println(user);

        //跳转到welcome.jsp

        return "welcomePage.jsp";

    }

}

2：修改index.jsp里面form表单action为login3

3：在页面输入网址

4：网页信息

5：控制台信息

（3.4）@RequestParam

1：在（3.1）的基础上创建com.gx.controller.Controller4

package com.gx.controller;

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

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

import com.gx.model.User;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

@Controller

public class Controller4{

    @RequestMapping(value="/login4")

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

                        @RequestParam("password")String password,

                        Model model){

        System.out.println("login in Controller4 is working......");

        User user = new User();

        user.setPassword(password);

        user.setUsername(username);

        System.out.println(user);

        model.addAttribute("user",user);

        //跳转到welcome.jsp

        return "welcomePage.jsp";

    }

}

2：修改index.jsp里面form表单action为login4

3：在页面输入网址

4：页面信息

5：控制台信息

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