Teach you to create a Maven+Spring MVC HelloWord project with eclipse

1. Create a new maven project

Click next

This is the directory of the project

We will find that the project is wrong, and then solve the error (if it is correct, please skip it)

Next, I found that the project has no errors

Note: As a Maven project, the following 4 resource folders must be included, if not, you need to create them manually.

We will find that our project has a problem

Next create

The configuration corresponds to this

The next step is to change the pom.xml file (add the jars required by springmvc)

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.hello</groupId>
  <artifactId>HelloSpringMVC</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>HelloSpringMVC Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
    <!-- spring start -->  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-aop</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-aspects</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-beans</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-context</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-context-support</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-core</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-expression</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jdbc</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-orm</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-test</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-tx</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-web</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-webmvc</artifactId>  
        <version>4.3.16.RELEASE</version>  
    </dependency>  
      
    <!-- spring end -->  
    
  </dependencies>
  <build>
    <finalName>HelloSpringMVC</finalName>
  </build>
</project>

Change web.xml file configuration

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  
  
   <!-- Front Controller-->  
    <servlet>    
        <servlet-name>spring-mvc</servlet-name> <!-- name, the real file name needs to add -servlet suffix to this name -->  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--  DispatcherServlet路径，照写 -->  
         
        <!-- Here you can set the path of the front-end controller. If this step is commented out, the default path of the front-end controller is: /WEB-INF/[servlet-name]-servlet.xml  
       <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>/WEB-INF/configs/spring-mvc-servlet.xml</param-value> Here is the path to configure the front controller  
        </init-param>    
        -->  
          
        <load-on-startup>1</load-on-startup>  
    </servlet>    
      
    <!-- Intercept all requests -->  
    <servlet-mapping>    
        <servlet-name>spring-mvc</servlet-name> <!-- The name here should be the same as the servlet-name above -->  
        <url-pattern>/</url-pattern>    
    </servlet-mapping>    
</web-app>

New front controller configuration file

Because the default path is used here, only the front controller file needs to be created in the WEB-INF directory.

And because the name configured in web.xml is spring-mvc, the new file name is spring-mvc-servlet.

Next is the configuration content of spring-mvc-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:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	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-4.3.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
		
 <!-- scan path -->  
    <context:component-scan base-package="com.hp.controller" >  
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>  
    </context:component-scan>  
  
    <!-- Configure root view -->  
    <mvc:view-controller path="/" view-name="index"/>  
  
    <!-- activate annotation-based configuration @RequestMapping, @ExceptionHandler, data binding, @NumberFormat ,  
    @DateTimeFormat ,@Controller ,@Valid ,@RequestBody ,@ResponseBody等  -->  
    <mvc:annotation-driven />  
  
    <!-- Static resource configuration-->  
    <mvc:resources location="/assets/" mapping="/assets/**"></mvc:resources>  
  
    <!-- View Layer Configuration -->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <property name="prefix" value="/WEB-INF/view/"/>  
        <property name="suffix" value=".jsp"/>  
    </bean>  
  


</beans>

The next step is to create the controller class

Among them, it should be noted that

Next is the writing of spring-mvc-servlet.java

package com.hp.controller;

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

@Controller
@RequestMapping("hello")
public class SpringController {
	@RequestMapping("one")
	public String Hello(Model model){
		model.addAttribute("msg", "This is my first springMVC project");
		return "text";
	}

}

Next, write the returned jsp page

New text.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>This is a jsp</title>
</head>
<body>
<h1>${msg }</h1>
</body>
</html>