【SSM】Spring + SpringMVC +MyBatis 框架整合

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一、导入相关依赖

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pom.xml配置文件：

• 打包方式：war

<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>com.haojin.ssmgroupId>
    <artifactId>ssmartifactId>
    <version>1.0-SNAPSHOTversion>
    <packaging>warpackaging>

    <properties>
        <maven.compiler.source>8maven.compiler.source>
        <maven.compiler.target>8maven.compiler.target>
        <spring.version>5.3.1spring.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-contextartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-beansartifactId>
            <version>${spring.version}version>
        dependency>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-aspectsartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-testartifactId>
            <version>${spring.version}version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.5.7version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>2.0.6version>
        dependency>
        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>1.0.9version>
        dependency>
        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>4.12version>
            <scope>testscope>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>8.0.31version>
        dependency>
        
        <dependency>
            <groupId>log4jgroupId>
            <artifactId>log4jartifactId>
            <version>1.2.17version>
        dependency>
        
        <dependency>
            <groupId>com.github.pagehelpergroupId>
            <artifactId>pagehelperartifactId>
            <version>5.2.0version>
        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>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-databindartifactId>
            <version>2.12.1version>
        dependency>
        <dependency>
            <groupId>commons-fileuploadgroupId>
            <artifactId>commons-fileuploadartifactId>
            <version>1.3.1version>
        dependency>
        
        <dependency>
            <groupId>org.thymeleafgroupId>
            <artifactId>thymeleaf-spring5artifactId>
            <version>3.0.12.RELEASEversion>
        dependency>
    dependencies>

project>

二、配置web.xml文件

---

• web.xml文件所在目录：*\src\main\webapp\WEB-INF\web.xml

配置目录：
1.spring的编码过滤器；
2.处理请求方式的过滤器；
3.SpringMVC的前端控制器DispatcherServlet；
4.自定义springmvc配置文件的名称与位置；
5.将DispatcherServlet的初始化时间提前到服务器启动前；
6.spring监听器，在服务器启动时加载spring的配置文件；
7.自定义spring配置文件的名称与位置；

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">

    
    <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>forceEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <filter>
        <filter-name>HiddenHttpMethodFilterfilter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <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>

    
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>

    
    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:spring.xmlparam-value>
    context-param>
web-app>

三、SpringMVC配置文件

---

• SpringMVC配置文件的位置：Maven工程下的resources目录

SpringMVC配置文件：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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    
    <context:component-scan base-package="com.haojin.ssm.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>

    
    <mvc:default-servlet-handler />

    
    <mvc:annotation-driven />

    
    <mvc:view-controller path="/" view-name="index">mvc:view-controller>

    
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
beans>

• 配置文件中配置了扫描的包：com.haojin.ssm.controller

• 配置文件中视图控制器所配置的视图：index.html

四、搭建MyBatis环境

---

⚪属性文件jdbc.properties

属性文件jdbc.properties中存放的是用于连接数据库的相关属性：

jdbc.username=root
jdbc.password=abc123
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
jdbc.driver=com.mysql.cj.jdbc.Driver

---

⚪MyBatis核心配置文件

• MyBatis的核心配置文件通常命名为：mybatis-config.xml:

DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    
    <properties resource="jdbc.properties"/>


    
    <settings>
        
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        
        <setting name="lazyLoadingEnabled" value="true"/>
        
    settings>

    
    
    <typeAliases>
        <package name="com.haojin.mybatis.pojo"/>
    typeAliases>

    <plugins>
        
        <plugin interceptor="com.github.pagehelper.PageInterceptor" >plugin>
    plugins>

    
    
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            dataSource>
        environment>
    environments>
    

    
    <mappers>
        <package name="com.haojin.mybatis.mapper"/>
    mappers>
    
configuration>

---

⚪创建Mapper接口 + Mapper映射文件

注意：

1. 映射文件的属性 namespace 要和mapper接口的 全类名 保持一致
2. 映射文件中，SQL语句的 id 与mapper接口中的 方法名 保持一致

Mapper接口 EmployeeMapper:

/**
 * @author .29.
 * @create 2023-03-15 15:49
 */
public interface EmployeeMapper {
    List<Employee> getEmployeeList();
}

Mapper映射文件 EmployeeMapper.xml：

DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.haojin.ssm.mapper.EmployeeMapper">

    

    

    
    <select id="getEmployeeList" resultType="Employee">
        select * from t_emp;
    select>


mapper>

---

⚪日志文件log4j.xml

在导入依赖时，我们导入了Log4j日志框架，所以需要配置其核心配置文件：log4j.xml。

DOCTYPE log4j:configuration SYSTEM "log4j.dtd">


<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

    <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
        <param name="Encoding" value="UTF-8"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%-5p %d{MM-dd HH:mm:ss,SSS}
%m (%F:%L) \n"/>
        layout>
    appender>
    <logger name="java.sql">
        <level value="debug"/>
    logger>
    <logger name="org.apache.ibatis">
        <level value="info"/>
    logger>
    <root>
        <level value="debug"/>
        <appender-ref ref="STDOUT"/>
    root>
log4j:configuration>

五、Spring配置文件

---

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

    
    <context:component-scan base-package="com.haojin.ssm">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    context:component-scan>

    
    <context:property-placeholder location="classpath:jdbc.properties"/>
    
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="url" value="${jdbc.url}">property>
        <property name="username" value="${jdbc.username}">property>
        <property name="password" value="${jdbc.password}">property>
        <property name="driverClassName" value="${jdbc.driver}">property>
    bean>


    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        
        <property name="dataSource" ref="dataSource">property>
    bean>
    
    <tx:annotation-driven transaction-manager="transactionManager"/>


    
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="configLocation" value="classpath:mybatis-config.xml">property>
        
        <property name="dataSource" ref="dataSource">property>
        
        <property name="typeAliasesPackage" value="com.haojin.ssm.pojo">property>
        
        
    bean>

    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="basePackage" value="com.haojin.ssm.mapper">property>
    bean>

    
beans>

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