2023-01-22
一、SSM整合
1、Spring + SpringMVC
（1）容器管理对象，由DispatcherServlet管理
（2）Spring容器对象，由ContextLoaderListener管理
2、解决组件扫描的冲突问题
（1）SpringMVC只扫描Controller层
（2）Spring扫描排除Controller层
2、Spring+Mybatis
（1）关于数据源、事务管理的代码冲突问题
同意交给Spring管理
（2）Spring管理Mybatis核心对象
①SqlSessionFactory
②Mapper代理对象
二、SSM整合步骤
1、Spring + SpringMVC
（1）导入jar包
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.3.1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf-spring5 --> <dependency> <groupId>org.thymeleaf</groupId> <artifactId>thymeleaf-spring5</artifactId> <version>3.0.12.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency>
（2）配置文件
①web.xml
a.注册CharacterEncodingFilter，解决请求乱码问题
b.注册HiddenHttpMethodFilter，支持PUT&DELETE提交【REST风格】
c.注册DispatcherServlet（前端控制器），管理springMVC容器对象
d.注册一个上下文参数（contextConfigLocation），设置spring.xml配置文件路径
e.注册ContextLoaderListener，管理spring容器对象（目的是为了加载spring的配置文件，帮我们初始化IOC容器）
<?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"> <!-- d.注册一个上下文参数（contextConfigLocation），设置spring.xml配置文件路径--> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml</param-value> </context-param> <!-- e.注册ContextLoaderListener，管理spring容器对象--> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- a.注册CharacterEncodingFilter，解决请求乱码问题--> <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>forceRequestEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- b.注册HiddenHttpMethodFilter，支持PUT&DELETE提交【REST风格】--> <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> <!-- c.注册DispatcherServlet（前端控制器），管理springMVC容器对象--> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <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> </web-app>
②springMVC.xml
a.开启组件扫描（只扫描Controller）
b.装配视图解析器
c.装配视图控制器（view-controller）
d.装配"default-servlet-handler"，解决静态资源加载问题
e.装配"annotation-driven"，解决后续问题
解决view-controller问题、解决default-servlet-handler问题、解决Jackon配置消息转换器问题
<?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"> <!-- a.开启组件扫描（只扫描Controller）--> <context:component-scan base-package="com.hh" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- b.装配视图解析器--> <bean class="org.thymeleaf.spring5.view.ThymeleafViewResolver"> <property name="characterEncoding" value="UTF-8"></property> <property name="templateEngine"> <bean class="org.thymeleaf.spring5.SpringTemplateEngine"> <property name="templateResolver"> <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver"> <property name="characterEncoding" value="UTF-8"></property> <property name="prefix" value="WEB-INF/pages/"></property> <property name="suffix" value=".html"></property> </bean> </property> </bean> </property> </bean> <!-- c.装配视图控制器（view-controller）--> <mvc:view-controller path="/" view-name="index"></mvc:view-controller> <!-- d.装配"default-servlet-handler"，解决静态资源加载问题--> <mvc:default-servlet-handler></mvc:default-servlet-handler> <!-- e.装配"annotation-driven"，解决后续问题--> <mvc:annotation-driven></mvc:annotation-driven> </beans>
③spring.xml
开启组件扫描（排除Controller层）
<?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 https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 开启组件扫描--> <context:component-scan base-package="com.hh"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>
2、Spring+Mybatis
（1）导入jar包
①spring的jar包
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.3.10</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-orm --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>5.3.10</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-context --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>5.3.10</version> </dependency>
②mybatis的jar包
<!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.26</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.6</version> </dependency> <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.0.0</version> </dependency>
③spring与mybatis整合jar包
<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency>
（2）配置文件
①spring.xml
a.开启组件扫描（排除Controller层）
b.加载外部属性文件
c.装配数据源（DruidDataSource）
d.装配事务管理器（DataSourceTransactionManager）
e.开启声明式事务管理注解支持
f.装配SqlSessionFactoryBean，管理SqlSessionFactory
g.装配MapperScannerConfigurer，管理Mapper代理对象
<?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" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" 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 http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd"> <!-- a.开启组件扫描（排除Controller层）--> <context:component-scan base-package="com.hh"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- b.加载外部属性文件--> <context:property-placeholder location="classpath:db.properties"></context:property-placeholder> <!-- c.装配数据源（DruidDataSource）--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${db.driverClassName}"></property> <property name="url" value="${db.url}"></property> <property name="username" value="${db.username}"></property> <property name="password" value="${db.password}"></property> </bean> <!-- d.装配事务管理器（DataSourceTransactionManager）--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- e.开启声明式事务管理注解支持--> <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven> <!-- f.装配SqlSessionFactoryBean，管理SqlSessionFactory--> <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 设置数据源--> <property name="dataSource" ref="dataSource"></property> <!-- 设置mybatis-config.xml核心配置文件路径--> <property name="configLocation" value="classpath:mybatis-config.xml"></property> <!-- 设置类型别名--> <property name="typeAliasesPackage" value="com.hh.pojo"></property> <!-- 设置映射文件路径--> <property name="mapperLocations" value="classpath:/mapper/*.xml"></property> </bean> <!-- g.装配MapperScannerConfigurer，管理Mapper代理对象--> <mybatis-spring:scan base-package="com.hh.mapper"></mybatis-spring:scan> </beans>
②springmvc.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"> <!-- a.开启组件扫描（只扫描Controller）--> <context:component-scan base-package="com.hh" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- b.装配视图解析器--> <bean class="org.thymeleaf.spring5.view.ThymeleafViewResolver"> <property name="characterEncoding" value="UTF-8"></property> <property name="templateEngine"> <bean class="org.thymeleaf.spring5.SpringTemplateEngine"> <property name="templateResolver"> <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver"> <property name="characterEncoding" value="UTF-8"></property> <property name="prefix" value="WEB-INF/pages/"></property> <property name="suffix" value=".html"></property> </bean> </property> </bean> </property> </bean> <!-- c.装配视图控制器（view-controller）--> <mvc:view-controller path="/" view-name="index"></mvc:view-controller> <!-- d.装配"default-servlet-handler"，解决静态资源加载问题--> <mvc:default-servlet-handler></mvc:default-servlet-handler> <!-- e.装配"annotation-driven"，解决后续问题--> <mvc:annotation-driven></mvc:annotation-driven> </beans>
③mybatis-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> <settings> <!-- 开启自动驼峰式命名映射--> <setting name="mapUnderscoreToCamelCase" value="true"/> <!-- 开启延迟加载--> <setting name="lazyLoadingEnabled" value="true"/> <!-- 延迟加载的属性--> <setting name="aggressiveLazyLoading" value="false"/> <!-- 开启二级缓存--> <setting name="cacheEnabled" value="true"/> </settings> <!-- 添加分页插件--> <plugins> <plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin> </plugins> </configuration>