SSM整合

1 ContextLoaderListener

Spring提供了监听器ContextLoaderListener，实现ServletContextListener接口，可监听ServletContext状态，在web服务器启动时，读取Spring配置文件，创建IOC容器。Web应用程序必须在web.xml中配置。

<listener><!--配置Spring的监听器，在服务器启动时加载Spring的配置文件Spring配置文件默认位置和名称：/WEB-INF/applicationContext.xml可通过上下文参数自定义Spring配置文件的位置和名称--><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--自定义Spring配置文件的位置和名称-->
<context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring.xml</param-value>
</context-param>

2 整合SSM相关依赖

<packaging>war</packaging>
<properties><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>8.0.16</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>

3 配置web.xml

<!-- 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><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>CharacterEncodingFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置处理请求方式PUT和DELETE的过滤器 -->
<filter><filter-name>HiddenHttpMethodFilter</filter-name><filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filterclass>
</filter>
<filter-mapping><filter-name>HiddenHttpMethodFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置SpringMVC的前端控制器 -->
<servlet><servlet-name>DispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 设置SpringMVC的配置文件的位置和名称 --><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:SpringMVC.xml</param-value></init-param><load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 设置Spring的配置文件的位置和名称 -->
<context-param><param-name>contextConfigLocation</param-name><param-value>classpath:Spring.xml</param-value>
</context-param>
<!-- 配置Spring的监听器 -->
<listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

4 SpringMVC配置

SpringMVC配置可以融合进Spring配置文件中，但为了区别，可以单独简历SpringMVC配置文件

<!--扫描组件-->
<context:component-scan base-package="com.atguigu.ssm.controller">
</context:component-scan>
<!--配置视图解析器-->
<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>
<!-- 配置访问首页的视图控制 -->
<mvc:view-controller path="/" view-name="index"></mvc:view-controller>
<!-- 配置默认的servlet处理静态资源 -->
<mvc:default-servlet-handler />
<!-- 开启MVC的注解驱动 -->
<mvc:annotation-driven />

5 MyBatis配置

MyBatis配置可以融合进Spring配置中，但为了区别，可以单独简历MyBatis配置文件

<?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><!--将下划线映射为驼峰--><setting name="mapUnderscoreToCamelCase" value="true"/></settings><plugins><!--配置分页插件--><plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin></plugins>
</configuration>

创建log4j配置文件

<?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>

6 Spring配置

创建JDBC配置文件

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

创建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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsd"><!--扫描组件--><context:component-scan base-package="com.atguigu.ssm"><context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/></context:component-scan><!-- 引入jdbc.properties --><context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder><!-- 配置Druid数据源 --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="${jdbc.driver}"></property><property name="url" value="${jdbc.url}"></property><property name="username" value="${jdbc.username}"></property><property name="password" value="${jdbc.password}"></property></bean><!-- 配置用于创建SqlSessionFactory的工厂bean --><bean class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 设置MyBatis配置文件的路径（可以不设置） --><property name="configLocation" value="classpath:mybatis-config.xml"></property><!-- 设置数据源 --><property name="dataSource" ref="dataSource"></property><!-- 设置类型别名所对应的包 --><property name="typeAliasesPackage" value="com.atguigu.ssm.pojo"></property><!--设置映射文件的路径若映射文件所在路径和mapper接口所在路径一致，则不需要设置--><!--<property name="mapperLocations" value="classpath:mapper/*.xml"></property>--></bean><!--配置mapper接口的扫描配置由mybatis-spring提供，可以将指定包下所有的mapper接口创建动态代理并将这些动态代理作为IOC容器的bean管理--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.atguigu.ssm.mapper"></property></bean>
</beans>