IDEA从0搭建SSM项目【图文】（一）——本地运行Hello World

记得初学SSM时，跟着网上的教程走，一步一坑，为了让更多的初学者体验一次搭建好SSM的快感，本人利用工作之余撰写此篇教程。

一，环境准备

1.IDEA工具

2.maven

① 配置到环境变量

② 将maven添加到IDEA

图中Local repository本地仓库使用默认m2就好【我这里是在配置文件里修改过了】
3.tomcat
这个应该都会，配置到IDEA

4.mysql
记得登录名和密码即可，将写入项目配置文件db.properties
本文用的5.7（注意5.7以后的mysql驱动不一样，是com.mysql.cj.jdbc.Driver）

5.jdk
本文用的1.8

二，搭建空项目

1.新建空项目

2.选择maven，点击next

3.随便填写GroupId和ArtifactId，点击next

4.填写项目名称，击next

5.finish，项目结构如图

6.新增webapp文件夹【因为是J2EE项目】
① 点击project structure

② 添加web模块

③ 如图，点击铅笔，替换路径【上面，下面都替换】中的\web为\src\main\webapp

④ 修改完如图

⑤ 点击ok，即自动生成如下目录

三，配置pom.xml，web.xml，新建spring mvc配置文件

1. pom.xml添加spring相关依赖
粘贴即可，有注释
主要就是spring相关包，servlet包，mysql连接包
本地运行暂时用不着

<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>

    <groupId>TestgroupId>
    <artifactId>TestartifactId>
    <version>1.0-SNAPSHOTversion>

    <properties>
        <spring.version>4.3.18.RELEASEspring.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>${spring.version}version>
        dependency>

        
        
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>javax.servlet-apiartifactId>
            <version>3.1.0version>
            <scope>providedscope>
        dependency>
        
        <dependency>
            <groupId>javax.servlet.jspgroupId>
            <artifactId>javax.servlet.jsp-apiartifactId>
            <version>2.2.1version>
            <scope>providedscope>
        dependency>
        
        <dependency>
            <groupId>org.apache.tomcatgroupId>
            <artifactId>tomcat-servlet-apiartifactId>
            <version>8.5.33version>
        dependency>

        
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.4.1version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>1.3.2version>
        dependency>


        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.43version>
        dependency>

        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-txartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
            <version>${spring.version}version>
        dependency>

        
        
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-dbcp2artifactId>
            <version>2.5.0version>
        dependency>
    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                
                <version>3.5.1version>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                configuration>
            plugin>

            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-war-pluginartifactId>
                <version>3.2.0version>
                <configuration>
                    <webXml>src\main\webapp\WEB-INF\web.xmlwebXml>
                configuration>
            plugin>
        plugins>
    build>
project>

2.web.xml配置spring mvc

<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">

    
    <filter>
        <filter-name>CharacterEncodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>utf-8param-value>
        init-param>
        <init-param>
            <param-name>forceRequestEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
        <init-param>
            <param-name>forceResponseEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:applicationContext.xmlparam-value>
    context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>

    
    <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>
    servlet>
    <servlet-mapping>
        <servlet-name>springmvcservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>

web-app>

3.springmvc.xml

<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.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
">

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

    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".html"/>
    bean>

    
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven/>
    
beans>

applicationContext.xml无任何配置

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

4.新建controller和WEB-INF/views/hello.html【要在WEB-INF/views下，因为前面mvc配置文件里配的该路径，你也可以修改】

5.poject structure新建web应用，并添加到tomcat

点OK

部署到本地tomcat服务器


OK，运行，访问浏览器

这篇其实只是准备工作，主要是搭建+spring+spring mvc，下一篇在此基础上完善，进行真正的SSM增删改查~