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spring整合mybatis、springMVC(总结)
1.mybatis配置流程
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实体类pojo类
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编写Dao层(UserMapper接口以及xml文件)
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编写Service接口以及实现类,通过Dao层对象进行访问数据库
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创建mybatis的核心配置文件mybatis-config.xml,并将UserMapper绑定到mybatis-config.xml中
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之前的配置
<?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> <environments default="development"> <environment id="development"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/mybatis? useSSL=true&useUnicode=true&characterEncoding=utf8"/> <property name="username" value="root"/> <property name="password" value="123456"/> </dataSource> </environment> </environments> <mappers> <mapper resource="com/kuang/dao/userMapper.xml"/> </mappers> </configuration>
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引入到spring后的配置
<?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> <!-- 原本是要去配置数据源信息的,但是和spring整合后,此步骤将交给spring去做--> <mappers> <mapper resource="com/kuang/dao/userMapper.xml"/> </mappers> </configuration>
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编写MyBatis工具类
import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import java.io.IOException; import java.io.InputStream; public class MybatisUtils { private static SqlSessionFactory sqlSessionFactory; static { try { String resource = "mybatis-config.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); } catch (IOException e) { e.printStackTrace(); } } //获取SqlSession连接 public static SqlSession getSession(){ return sqlSessionFactory.openSession(); } }
2.spring配置流程
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在xml文件中注册bean对象(没有用注解)
<?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 http://www.springframework.org/schema/beans/spring-beans.xsd"> <!--bean就是java对象 , 由Spring创建和管理--> <bean id="hello" class="com.kuang.pojo.Hello"> <property name="name" value="Spring"/> </bean> </beans>
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或者在xml文件中使用扫描包(配合注解)
<?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 http://www.springframework.org/schema/beans/spring-beans.xsd"> <!--指定注解扫描包--> <context:component-scan base-package="com.kuang.pojo"/> </beans>
3.spring 整合Dao层
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创建数据库配置文件 database.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mytest?useSSL=false&useUnicode=true&characterEncoding=utf8&serverTimezone=UTC jdbc.username=root jdbc.password=root
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创建spring整个Dao层的配置文件spring-dao.xml,主要整合数据库连接文件,连接池信息,sqlsessionFactory(需绑定Mybatis配置文件去读取配置Mapper信息),dao层动态注入到Spring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 http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!--1,关联数据库连接文件--> <context:property-placeholder location="classpath:database.properties"/> <!--2,连接池 c3p0--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false"/> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!-- 3,配置sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 绑定mybatis的配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 4,配置dao层,动态实现了接口可以注入到Spring容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <property name="basePackage" value="com.kuangshen.dao"/> </bean> </beans>
分析:spring-dao.xml文件整合了mybatis的mybatis-config.xml文件中的数据库配置信息以及工具类和dao层的bean信息。
4.spring整合Service层
创建spring整合service层的文件spring-service.xml
,主要配置让spring去扫描service包的位置,配置impl中要注入的mapper信息,声明事务的提交方式,以及AOP事务的支持。
<?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">
<!--扫描service下的包 -->
<context:component-scan base-package="com.swz.service"/>
<!-- 2业务类注入到spring-->
<bean id="UserServiceImpl" class="com.swz.service.UserServiceImpl">
<property name="userMapper" ref="userMapper"/>
</bean>
<!-- 3声明事务提交方式-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 4AOP事务支持-->
</beans>
注意:<context:component-scan base-package=“com.swz.service”/> 在xml配置了这个标签后,spring可以自动去扫描base-pack下面或者子包下面的Java文件,如果扫描到有@Component @Controller@Service等这些注解的类,则把这些类注册为bean。
5.spring整合MVC层
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创建spring整合mvc层的文件spring-mvc.xml,主要配置springMVC静态资源过滤,开启springMVC注解驱动
<?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:mvc="http://www.springframework.org/schema/mvc" 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/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"> <!--1.注解驱动--> <mvc:annotation-driven/> <!--2处理器映射器和处理器适配器--> <mvc:default-servlet-handler/> <!--3扫描包--> <context:component-scan base-package="com.leshangju.controller"/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
6. spring整合dao-service-mvc三层
将以上配置的spring-dao.xml,spring-service.xml,spring-mvc.xml整合到applicationContext.xml中,同一个spring文件中来,实现最终的整合。
注意:此步骤正确的方式是每配置完一个xml都注入整合进来一次,而不是最终才整合。
<?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
http://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="spring-dao.xml"/>
<import resource="spring-sevice.xml"/>
<import resource="spring-mvc.xml"/>
</beans>
学习链接:
https://blog.csdn.net/qq_37534947/article/details/122598685
https://blog.csdn.net/qq_37534947/article/details/122569406
https://blog.csdn.net/qq_37534947/article/details/122628171
参考链接:
https://blog.csdn.net/m0_47637225/article/details/122478644