spring的配置十分复杂,很难记忆。
这篇博客用于记录springmvc整合创建过程,虽然步骤有点多,但是每一步都很容易理解,便于以后忘记后参考和记忆。
这一步没有难点
junit:用于测试
mysql驱动:无论使用什么连接数据库,数据库驱动都是必须的需要的
jstl:用于书写el表达式,注意导入的时候别导错了,可能出现与其他包不兼容问题
数据源:用不同的数据源需要导入不同的依赖
<dependencies> <!--导入依赖 junit mysql驱动 servlet jsp jstl mybatis mybatis-spring spring-jdbc spring-webmvc 数据源c3p0 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.27</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2.1-b02</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.7</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.3.13</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.3.13</version> </dependency> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.5</version> </dependency> </dependencies>
这个里面一般写mapper和别名,这个可以完全用spring配置,在这里写为了便于分开管理。
<?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> <mappers> <mapper class=""/> </mappers> </configuration>
这个里面并没有写什么东西,只是最后所有关于的spring的东西,都导入到applicationContext.xml这一个里面,便于最后在web.xml中使用和管理
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd"> <!--在这里也可以看出用到spring的共三层,dao(mapper) service controller(servlet)--> <import resource="spring-service.xml"/> <import resource="spring-dao.xml"/> <import resource="spring-mvc.xml"/> </beans>
用于连接数据库设置
这里url使用8.0以上需要写时区,不写时区可能会出现一些问题
driver=com.mysql.cj.jdbc.Driver url=jdbc:mysql://localhost:3306/ssmbuild?characterEncoding=utf8&useSSL=false&serverTimezone=Hongkong username=root password=123456
可以看出前六步并没有什么复杂操作
这一步用于整合mybatis
mybatis是dao的操作,负责增删改查,创建spring-dao.xml文件整合mybatis
<?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 https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!--配置整合mybatis--> <!--一、关联数据库文件database.properties,spring一般不能读取properties文件,但是使用这个之后可以用spring读取--> <context:property-placeholder location="classpath:database.properties"/> <!--二、数据库连接池--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${driver}"/> <property name="jdbcUrl" value="${url}"/> <property name="user" value="${url}"/> <property name="password" value="${password}"/> </bean> <!--三、配置SqlSessionFactory对象--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!--这个用于连接mybatis的xml文件,理论上来说完全不需要mybatis的xml了,这个完全可以代替--> <property name="configLocation" value="classpath:mybatis-context.xml"/> <!-- <property name="typeAliases" value=""/>--> <!-- <property name="mapperLocations" value=""/>--> </bean> <!--配置dao接口扫描包注入spring容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!--包名--> <property name="basePackage" value="com.hjk.dao"/> </bean> </beans>
把service的类注入到spring-service.xml中
<?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 https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 扫描service相关的bean --> <context:component-scan base-package="com.hjk.service"/> <!--Service实体类注入到IOC容器中--> </beans>
<?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 https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!--注解驱动--> <mvc:annotation-driven/> <!-- 静态资源过滤 --> <mvc:default-servlet-handler/> <!-- 视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <!-- 4.扫描web相关的bean --> <context:component-scan base-package="com.hjk.servlet" /> </beans>
<?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"> <!--DispatcherServlet分发器--> <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:applicationContext.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> <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> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>