在IntelliJ IDEA中集成SSM项目

SSM项目：springMVC为控制器、spring 为事务层、 MyBatis 负责持久

首先看下集成后项目结构：

1、打开IntelliJ IDEA，点击 "File" -> "New" -> "Project"。

点击Finish，此时我们就已经创建了一个maven-web项目；

2、在src/main 下，创建 java和resources文件夹；

在java文件夹下：创建controller，service，dao，entity等文件夹。

在resources文件夹下创建mappers（存放实体类映射.xml文件）文件夹和配置文件。

applicationContext.xml --spring 容器相关配置；

dispatcherServlet.xml --springMvc 相关配置；

mybatis-config.xml --mybatis 相关配置；

generatorConfig.xml --自动生成Dao、Model层相关代码；

jdbc.properties --jdbc常量配置；

log4j.properties --集成log4j

3、在webapp/WEB-INF 下，创建views文件夹，存放静态资源；

web.xml --web-servlet相关配置；

4、pom文件相关依赖

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

<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>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>web-ssm</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>web-ssm Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <!-- spring版本号 -->
    <spring.version>4.2.5.RELEASE</spring.version>
    <!-- mybatis版本号 -->
    <mybatis.version>3.2.4</mybatis.version>
    <!-- log4j日志文件管理包版本 -->
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <!-- log4j日志文件管理包版本 -->
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
  </properties>



  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- spring核心包 -->
    <!-- springframe start -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- springframe end -->

    <!-- mybatis核心包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!-- mybatis/spring包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>
    <!-- mysql驱动包 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.19</version>
    </dependency>
    <!-- c3p0 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.5</version>
    </dependency>
    <!-- junit测试包 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- jstl -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2.1-b03</version>
      <scope>provided</scope>
    </dependency>

    <!-- servlet -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>
    <!-- json数据 -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.7.1</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.7.1</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.7.1</version>
    </dependency>
    <dependency>
      <groupId>net.sf.json-lib</groupId>
      <artifactId>json-lib</artifactId>
      <version>2.4</version>
      <classifier>jdk15</classifier>
    </dependency>
    <!-- commons -->
    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.4</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1</version>
    </dependency>
    <dependency>
      <groupId>commons-pool</groupId>
      <artifactId>commons-pool</artifactId>
      <version>1.5.6</version>
    </dependency>
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
    <dependency>
      <groupId>commons-beanutils</groupId>
      <artifactId>commons-beanutils</artifactId>
      <version>1.8.3</version>
    </dependency>
    <dependency>
      <groupId>commons-httpclient</groupId>
      <artifactId>commons-httpclient</artifactId>
      <version>3.1</version>
    </dependency>
    <dependency>
      <groupId>commons-collections</groupId>
      <artifactId>commons-collections</artifactId>
      <version>3.1</version>
    </dependency>
    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.9</version>
    </dependency>
    <dependency>
      <groupId>javax.annotation</groupId>
      <artifactId>jsr250-api</artifactId>
      <version>1.0</version>
    </dependency>

    <dependency>
      <groupId>net.sf.ezmorph</groupId>
      <artifactId>ezmorph</artifactId>
      <version>1.0.6</version>
    </dependency>
    <dependency>
      <groupId>javax.activation</groupId>
      <artifactId>activation</artifactId>
      <version>1.1</version>
    </dependency>
    <!--<dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>-->
    <!-- 日志文件管理包 -->
    <!-- log start -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <!--上传-->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>1.3.5</version>
    </dependency>
    <dependency>
      <groupId>cglib</groupId>
      <artifactId>cglib</artifactId>
      <version>3.2.5</version>
    </dependency>

    <!-- log end -->
  </dependencies>

  <build>
    <finalName>web-ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>


    <plugins>
      <plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.2</version>
        <configuration>
          <!--允许移动生成的文件-->
          <verbose>true</verbose>
          <!--允许覆盖生成的文件-->
          <overwrite>true</overwrite>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

注*：

1*、本例MySQL Server 8.0

2*、使用?mybatis-generator-maven-plugin，在pom.xml中<pluginManagement>和<plugins>要同级，如下：

<build>
    <finalName>web-ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
    </pluginManagement>

    <plugins>
      <plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.2</version>
        <configuration>
          <!--允许移动生成的文件-->
          <verbose>true</verbose>
          <!--允许覆盖生成的文件-->
          <overwrite>true</overwrite>
        </configuration>
      </plugin>
    </plugins>
</build>

5、applicationContext.xml 相关配置：

<?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"
       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/tx
       http://www.springframework.org/schema/tx/springtx.xsd">

    <!--配合MyBatis-->
    <!--配置数据库参数-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--数据库连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--配置连接池属性-->
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--c3p0连接池私有属性-->
        <property name="maxPoolSize" value="${maxPoolSize}"/>
        <property name="minPoolSize" value="${minPoolSize}"/>
        <property name="autoCommitOnClose" value="false"/>
        <property name="checkoutTimeout" value="${checkoutTimeout}"/>
        <property name="acquireRetryAttempts" value="${acquireRetryAttempts}"/>
        <property name="initialPoolSize" value="${initialPoolSize}"/>
    </bean>

    <!-- 配置 SqlSessionFactory 对象，spring和MyBatis完美整合，不需要mybatis的配置映射文件-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置 MyBaties 全局配置?件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!-- 扫描 model 包 使?别名 -->
        <property name="typeAliasesPackage" value="org.example.entity"/>
        <!-- 扫描 sql 配置?件:mapper 需要的 xml ?件 -->
        <property name="mapperLocations" value="classpath:mappers/*.xml"/>
    </bean>
    <!-- 配置扫描 dao 接?包， 动态实现 dao 接?， 注?到 Spring 容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注? sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描 dao 接?包 -->
        <property name="basePackage" value="org.example.dao"/>
    </bean>
    <!--spring-service-->
    <!-- 扫描 service 包下所有使?注解的类型 -->
    <context:component-scan base-package="org.example.service"/>

    <!-- 配置事务管理器 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注?数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

6、dispatcherServlet.xml 相关配置：

<?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:p="http://www.springframework.org/schema/p"
       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/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- controller扫描器 -->
    <context:component-scan base-package="org.example.controller"/>


    <!-- 配置注解驱动 -->
    <mvc:annotation-driven/>
    <!-- 视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/views/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--静态资源默认servlet配置
        (1)加?对静态资源的处理： js,gif,png
        (2)允许使?"/"做整体映射
    -->
    <mvc:default-servlet-handler/>
</beans>

7、mybatis-config.xml 相关配置：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="jdbcTypeForNull" value="NULL"/>

        <!--显式的指定每个我们需要更改的配置的值，即使他是默认的。防止版本更新带来的问题  -->
        <setting name="cacheEnabled" value="true"/>
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="aggressiveLazyLoading" value="false"/>

        <!-- 使?jdbc的getGeneratedKeys获取数据库?增主键值 -->
        <setting name="useGeneratedKeys" value="true" />
        <!-- 使?列别名替换列名 默认:true -->
        <setting name="useColumnLabel" value="true" />
        <setting name="cacheEnabled" value="true"/>
    </settings>
</configuration>

8、generatorConfig.xml 相关配置：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!--导入属性配置 jdbc配置文件-->
    <properties resource="jdbc.properties"></properties>

    <!--指定特定数据库的jdbc驱动jar包的位置  此处需要指明mysql-connector-java-5.1.30.jar的绝对路径，否则会报错！-->
    <!--    <classPathEntry location="D:\database\mysql\jar\mysql-connector-java-5.1.37-bin.jar"/>-->
    <classPathEntry location="E:\MyRepository\mysql\mysql-connector-java\8.0.19\mysql-connector-java-8.0.19.jar"/>
    <context id="default" targetRuntime="MyBatis3">

        <!-- optional，旨在创建class时，对注释进行控制 -->
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!--jdbc的数据库连接 -->
        <jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}"
                        userId="${jdbc.username}" password="${jdbc.password}">
        </jdbcConnection>

        <!-- 非必需，类型处理器，在数据库类型和java类型之间的转换控制-->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 生成模型model的包名和位置 此处需要根据自己项目做调整-->
        <!-- Model模型生成器,用来生成含有主键key的类，记录类 以及查询Example类
      targetPackage     指定生成的model生成所在的包名
        targetProject     指定在该项目下所在的路径
    -->
        <!--<javaModelGenerator targetPackage="com.mmall.pojo" targetProject=".\src\main\java">-->
        <javaModelGenerator targetPackage="org.example.entity" targetProject="./src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否对model添加 构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否对类CHAR类型的列的数据进行trim操作 （去空）-->
            <property name="trimStrings" value="true"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        <!--mapper映射文件生成所在的目录 为每一个数据库的表生成对应的SqlMap文件 -->
        <!--<sqlMapGenerator targetPackage="mappers" targetProject=".\src\main\resources">-->
        <sqlMapGenerator targetPackage="mappers" targetProject="./src/main/resources">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- 客户端代码，生成易于使用的针对Model对象和XML配置文件 的代码
            type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象
            type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象
            type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口
   -->

        <!-- targetPackage：mapper接口dao生成的位置 -->
        <!--<javaClientGenerator type="XMLMAPPER" targetPackage="com.mmall.dao" targetProject=".\src\main\java">-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="org.example.dao" targetProject="./src/main/java">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名 -->
        <table tableName="student" domainObjectName="Student" enableCountByExample="false"
               enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
        <!-- 数据库中该字段的类型是 txt ,不同版本生成对应字体类的属性类型可能不同，因此指定转换类型 -->


        <!-- mybatis插件的搭建 -->
    </context>
</generatorConfiguration>

9、jdbc.properties 相关配置：

#jdbc.driver=com.mysql.jdbc.Driver
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/testdata?useSSL=false&serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=yhuan
#最大连接数
maxPoolSize=20
#最小连接数
minPoolSize=10
#连接超时时间
checkoutTimeout=60000
#失败重连次数
acquireRetryAttempts=3
#初始化连接数量
initialPoolSize=10

10、log4j.properties 相关配置：

### set log levels ###
log4j.rootLogger = INFO,D

###输出到控制台###
log4j.logger.toConsole=debug,stdout
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout


log4j.appender.stdout.layout.ConversionPattern =%d{yyyy-MM-dd HH\:mm\:ss} [%5p] - %c -%F(%L) -%m%n

### 输出到日志文件 ###
##  其中File 可以采用绝对路径 亦可以采用相对路径 catalina.home 是tomcat目录  如果没有logs文件夹 将会报错  ##
##  更加倾向于将日志文件放在  D:/database/log4j/log4jTest/logtest.log ##
##  绝对路径如：e:/logtest.log ##
log4j.logger.daily=INFO,D
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = E:/log4j/log4jTest/logtest.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = INFO
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern =%d{yyyy-MM-dd HH\:mm\:ss} [%5p] - %c -%F(%L) -%m%n


##log4j.logger.org.apache.ibatis=debug,stdout
##log4j.logger.java.sql=debug,stdout

11、web.xml 相关配置：

<!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>
  <!--Spring MVC 配置 并添加监听-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!-- 字符过滤器 传值乱码-->
  <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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--配置前端控制器 进行请求分发 DispatcherServlet本质也是一个Servlet -->
  <servlet>
    <!--名字可以自定义-->
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:dispatcherServlet.xml</param-value>
    </init-param>
    <!--标记容器启动的时候就启动这个servlet-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <!--拦截所有-->
    <url-pattern>/</url-pattern>
  </servlet-mapping>
<!--  <absolute-ordering />-->
</web-app>

12、使用mybatis-generator-maven-plugin：

右键→Run Maven Build，即可在generatorConfig.xml配置的路径下生成Dao，Model层代码。

13、项目添加tomcat启动：

14、新建TestController.java，启动tomcat，测试---

package org.example.controller;

import org.example.entity.Student;
import org.example.entity.User;
import org.example.service.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.List;

@Controller
@RequestMapping(value = "/test")
public class TestController {

    @Autowired
    private TestService testService;

    @RequestMapping(value = "/testQuery",produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String testQuery(){

        System.out.println("TestController--------------------------------------------");
        List<User> userList = testService.query();
        return userList.get(0).getName();
    }

    @RequestMapping(value = "/student/{id}",produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String student(@PathVariable("id") Integer id){

        System.out.println("student-id:"+ id + "------------------------");
        Student student = testService.student(id);
        return student.getName();
    }

    @RequestMapping(value = "/hello")
    public String hello(){
        return "hello";
    }

    public static void main(String[] args) {
        try{
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/testdata?useSSL=false&serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8","root","yhuan");
            Statement myStmt = conn.createStatement();
            ResultSet rs = myStmt.executeQuery("SELECT * FROM user");
            while(rs.next()) {
                System.out.println(rs.getString("name"));
            }
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }
}

注*：内附main方法，自测数据库连通性。

新建/webapp/WEB-INF/views/hello.jsp

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2024/1/16
  Time: 16:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>this is helloPage</title>
</head>
<body>
<h3>这是SSM框架的 hello页面</h3>
</body>
</html>

http://localhost:8080/web-ssm/test/testQuery

http://localhost:8080/web-ssm/test/hello

参考文章：IDEA 详细SSM框架的搭建_ssm 文件夹结构-CSDN博客

end！！！