Construction of SSM (Spring+Spring+Mybatis) framework
1. Create a new Maven project , click to learn how to build a maven project
The directory structure is as follows:
2. Introduce relevant dependencies into the pom.xml file
spring 核心依赖： spring-core、spring-beans、spring-context
spring dao依赖：（提供JDBCTemplate） spring-jdbc、spring-tx
spring web依赖：spring-web、spring-webmvc
spring test依赖：spring-test
pom.xml:
<!-- Spring依赖 -->
<!-- 1.Spring核心依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- 2.Spring dao依赖 -->
<!-- spring-jdbc包括了一些如jdbcTemplate的工具类 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- 3.Spring web依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- 4.Spring test依赖：方便做单元测试和集成测试 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
3. Add the spring configuration file (ApplicationContext.xml) and
create a new spring folder under the src/main/resource file.
Create a new ApplicationContext.xml under the spring file.
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:cache="http://www.springframework.org/schema/cache"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.2.xsd"
xmlns:tx="http://www.springframework.org/schema/tx">
<!-- 启用注解 -->
<context:annotation-config />
<!-- 启动组件扫描，排除@Controller组件 -->
<context:component-scan base-package="com.webchat" >
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
</context:component-scan>
<context:property-placeholder location="classpath:resource/*.properties" ignore-unresolvable="true"/>
</bean>
4. Add the springMVC configuration file (spring-mvc-servlet.xml) and
create a new spring-mvc-servlet.xml under the spring file.
<?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/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 哪些包需要扫描 -->
<context:component-scan base-package="com.webchat" >
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service"/>
</context:component-scan>
<!-- 启用注解 -->
<context:annotation-config />
<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/page/" />
<property name="suffix" value=".jsp" />
<property name="order" value="1" />
</bean>
</beans>
5. Configure and start the spring and springMVC containers in the web.xml file.
<!-- 启动spring容器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/ApplicationContext.xml</param-value>
</context-param>
<!-- 启动SpringMVC -->
<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:/spring/spring-mvc-servlet.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>
6. Configure the database connection pool and configure the Bean in ApplicationContext.xml.
Here, Alibaba’s druid connection pool is used.
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<!-- 数据库基本信息配置 -->
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="driverClassName" value="${jdbc.driver}" />
<property name="filters" value="${filters}" />
<property name="maxActive" value="${maxActive}" />
<!-- 初始化连接数量 -->
<property name="initialSize" value="${initialSize}" />
<!-- 配置获取连接等待超时的时间 -->
<property name="maxWait" value="${maxWait}" />
<!-- 最小空闲连接数 -->
<property name="minIdle" value="${minIdle}" />
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis}" />
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis}" />
<property name="validationQuery" value="${validationQuery}" />
<property name="testWhileIdle" value="${testWhileIdle}" />
<property name="testOnBorrow" value="${testOnBorrow}" />
<property name="testOnReturn" value="${testOnReturn}" />
<property name="maxOpenPreparedStatements" value="${maxOpenPreparedStatements}" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="${removeAbandoned}" />
<!-- 1800秒，也就是30分钟 -->
<property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="${logAbandoned}" />
</bean>
Add the database connection pool configuration file druid.propertise
Mysql uses the driver starting from 8: com.mysql.cj.jdbc.Driver
Mysql uses the driver before 8: com.mysql.jdbc.Driver
jdbc.url=jdbc\:mysql\://localhost\:3306/webchat?useUnicode\=true&characterEncoding\=utf8&characterSetResults\=utf8&serverTimezone\=UTC&useSSL=false
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.username=root
jdbc.password=root
filters=stat
maxActive=20
initialSize=1
maxWait=60000
minIdle=10
maxIdle=15
timeBetweenEvictionRunsMillis=60000
minEvictableIdleTimeMillis=300000
validationQuery=SELECT 'x'
testWhileIdle=true
testOnBorrow=false
testOnReturn=false
maxOpenPreparedStatements=20
removeAbandoned=true
removeAbandonedTimeout=1800
logAbandoned=true
7. Introduce mybatis
and add configuration in ApplicationContext.xml:
<!--创建 sqlSessionFactory，给了数据源和配置路径 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="mapperLocations" value="classpath:com/promote/entityMapper/*Mapper.xml"/>
</bean>
<!-- 配置Mapper扫描 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.promote" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
At this point, the ssm framework is basically completed, and functions can be added as needed.
There may be garbled code problems in the project. Click here to view the solution.