SpringMVC

新建项目：SpringmvcDemoLiuJie

导包：MySQL驱动包、框架基础包、添加MyBatis核心配置文件

添加web

右键SpringmvcDemoLiuJie项目名——Add Framework Support——Versions4.0——Create web.xml（自动创建web.xml）——ok

配置SpringMVC

引入依赖

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13.2</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.2.13.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

刷新Maven自动下载

配置静态资源导出

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

Spring核心配置文件

main——resources——applicationContext.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
           https://www.springframework.org/schema/context/spring-context.xsd
           http://www.springframework.org/schema/mvc
           https://www.springframework.org/schema/mvc/spring-mvc.xsd
       ">

    <!-- bean definitions here -->

</beans>

添加SpringMVC配置内容

1.加载注解驱动

注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter实例，

可以用annotation-driven配置自动完成注入

<mvc:annotation-driven/>

2.静态资源过滤

<mvc:default-servlet-handler/>

3.视图解析器——自动添加前后缀

<!-- 3视图解析器 -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <property name="suffix" value=".jsp"/>
</bean>

controller包：HelloController

配置Spring容器自动扫描包

applicationContext.xml

<!-- 自动扫描包，让指定包下的注解生效,由IOC容器统一管理 -->
<context:component-scan base-package="controller"/>

编写jsp

WEB—INF包：

新建jsp包—hello.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${msg}
</body>
</html>

编写web.xml

1.配置前端控制器

<!-- 配置前端控制器 -->
<servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>

2.配置初始化参数

<!-- 配置初始化参数 -->
<init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</init-param>

3.设置启动级别

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

4.设置SpringMVC拦截请求

<!-- 设置SpringMVC拦截请求 -->
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

5.配置中文乱码过滤器

<!--  乱码过滤 -->
<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>utf-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>