SpringMVC -- 搭建框架

1. 使用模板创建一个web项目，删除多余的文件

替换web版本 模板创建的版本太旧 需要我们手动更新一下：

web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

web-app>

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2. 新建Java目录 标记为Sources Root目录

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3. 导入相关的依赖 并删除pom文件多余的内容

pom.xml

<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>4.0.0modelVersion>
    <packaging>warpackaging>

    <name>demo2name>
    <groupId>com.tiangroupId>
    <artifactId>demo2artifactId>
    <version>1.0-SNAPSHOTversion>


    <dependencies>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>5.3.1version>
        dependency>

        
        <dependency>
            <groupId>ch.qos.logbackgroupId>
            <artifactId>logback-classicartifactId>
            <version>1.2.3version>
        dependency>

        
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>javax.servlet-apiartifactId>
            <version>3.1.0version>
            
            <scope>providedscope>
        dependency>

        
        <dependency>
            <groupId>org.thymeleafgroupId>
            <artifactId>thymeleaf-spring5artifactId>
            <version>3.0.12.RELEASEversion>
        dependency>
    dependencies>

project>

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4. 注册DispatcherServlet

web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    
    
    <servlet>
        <servlet-name>springMVCservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        
        <init-param>
            
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:springMVC.xmlparam-value>
        init-param>
        
        <load-on-startup>1load-on-startup>
    servlet>


    <servlet-mapping>
        <servlet-name>springMVCservlet-name>
        
        <url-pattern>/url-pattern>
    servlet-mapping>
web-app>

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5. 创建SpringMVC核心配置文件 并配置该文件

springMVC.xml

配置组件扫描 & 视图解析器

<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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

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

    
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
                        
                        <property name="prefix" value="/WEB-INF/templates/"/>
                        
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8"/>
                    bean>
                property>
            bean>
        property>
    bean>
beans>

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6. 编写Controller层

HelloController.java

package com.tian.controller;

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

@Controller
public class HelloController {
     


    /**
     * 通过@RequestMapping注解，可以通过请求路径匹配要处理的具体的请求
     *
     * @RequestMapping注解：处理请求和控制器方法之间的映射关系 注解的value属性可以通过请求地址匹配请求，
     * /表示的当前工程的上下文路径
     */
    @RequestMapping("/")
    public String index() {
     
        return "index";
    }
}

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7. 创建controller对应的视图

index.html

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页title>
head>
<body>
<h1>首页h1>
<h1 style="text-align: center;color:orange;">Spring MVC 框架搭建完毕h1>
body>
html>

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8. 配置Tomcat 启动服务器

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