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SSM框架整合

一、导入相关依赖
二、配置web.xml文件
三、SpringMVC配置文件
四、搭建MyBatis环境
五、Spring配置文件

一、导入相关依赖

pom.xml配置文件：

打包方式：war

<?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>com.haojin.ssm</groupId>
    <artifactId>ssm</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--springmvc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</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-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Mybatis核心 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
        <!--mybatis和spring的整合包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
        <!-- junit测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <!-- MySQL驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.31</version>
        </dependency>
        <!-- log4j日志 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.2.0</version>
        </dependency>
        <!-- 日志 -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!-- ServletAPI -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.1</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- Spring5和Thymeleaf整合包 -->
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.12.RELEASE</version>
        </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:

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

    <!--配置spring的编码过滤器-->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>  <!--配置encoding，设置请求的编码为utf-8-->
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
        <init-param> <!--forceEncoding设置为true，使得响应的编码也能配置-->
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--配置处理请求方式的过滤器-->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--配置SpringMVC的前端控制器DispatcherServlet-->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--设置springmvc配置文件自定义的位置和名称-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!--将DispatcherServlet的初始化时间提前到服务器启动前-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--配置spring监听器，在服务器启动时加载spring的配置文件-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!--配置spring配置文件自定义的位置和名称-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml</param-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：

<?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">

    <!--配置扫描控制层的组件-->
    <context:component-scan base-package="com.haojin.ssm.controller"/>

    <!--配置Thymeleaf的视图解析器-->
    <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">

                        <!-- 视图前缀 -->
                        <property name="prefix" value="/WEB-INF/templates/"/>

                        <!-- 视图后缀 -->
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    </bean>
                </property>
            </bean>
        </property>
    </bean>

    <!--配置默认的servlet处理静态资源-->
    <mvc:default-servlet-handler />

    <!--开启mvc框架的注解驱动-->
    <mvc:annotation-driven />

    <!--配置视图控制器-->
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>

    <!--配置文件上传解析器-->
    <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:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    <!--引入外部文件：jdbc.properties-->
    <properties resource="jdbc.properties"/>


    <!--设置mybatis全局配置-->
    <settings>
        <!-- mapUnderscoreToCamelCase(默认为false) 下划线自动映射为驼峰 —— t_emp映射为tEmp -->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <!--lazyLoadingEnabled：开启延迟加载-->
        <setting name="lazyLoadingEnabled" value="true"/>
        <!---->
    </settings>

    
    <!--设置类型别名-->
    <typeAliases>
        <package name="com.haojin.mybatis.pojo"/>
    </typeAliases>

    <plugins>
        <!--配置分页插件-->
        <plugin interceptor="com.github.pagehelper.PageInterceptor" ></plugin>
    </plugins>

    
    <!--配置连接数据库的相关环境-->
    <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>
    

    <!--配置映射文件-->
    <mappers>
        <package name="com.haojin.mybatis.mapper"/>
    </mappers>
    
</configuration>

⚪创建Mapper接口 + Mapper映射文件

注意：

映射文件的属性 namespace 要和mapper接口的全类名保持一致
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：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--namespace属性与mapper接口全类名保持一致-->
<mapper namespace="com.haojin.ssm.mapper.EmployeeMapper">

    <!--SQL语句的id与mapper接口中的方法名保持一致-->

    <!--查询功能的标签，必须设置 resultType 或 resultMap
        - resultType： 设置默认的映射关系
        - resultMap： 设置自定义的映射关系-->

    <!--List<Employee> getEmployeeList();-->
    <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。

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

<!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

<?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: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">

    <!--扫描组件（除去控制层）-->
    <context:component-scan base-package="com.haojin.ssm">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--引入外部配置文件jdbc.properties-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置数据源-->
    <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>


    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--引用数据源-->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--开启事务注解驱动:将使用@Transactional表示的方法或类中的所有方法进行事务管理-->
    <tx:annotation-driven transaction-manager="transactionManager"/>


    <!--配置SqlSessionFactoryBean,可以直接从Spring的IOC容器中获取SqlSessionFactory对象-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--配置MyBatis核心配置文件的路径-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!--设置数据源，这里通过spring设置，mybatis-config.xml中的相关配置可删除-->
        <property name="dataSource" ref="dataSource"></property>
        <!--设置类型别名类似的包-->
        <property name="typeAliasesPackage" value="com.haojin.ssm.pojo"></property>
        <!--设置映射文件路径，只有映射文件的包和mapper接口的包不一致时需要设置-->
        <!--<property name="mapperLocations" value="classpath:mappers/*.xml"></property>-->
    </bean>

    <!--配置mapper接口扫描，通过SqlSession创建基础包中所有mapper接口的代理实现类对象并交给IOC管理-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--设置基础包-->
        <property name="basePackage" value="com.haojin.ssm.mapper"></property>
    </bean>

    
</beans>

【SSM】Spring + SpringMVC +MyBatis 框架整合