Question

MyBatis如何连接数据库

Answer 1

通过配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.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-4.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 开启注解扫描 -->
<context:component-scan base-package="com.ijava.springmvc.dao"/>
<!-- 加载配置文件 --> <!-- placeholder 占位符 -->
<context:property-placeholder location="classpath:resources/db.properties"/>

<!-- 数据库连接池 -->
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>

<!-- 创建对象 -->
<bean id="userDao" class="com.ijava.springmvc.dao.UserDaoImpl"></bean>
<bean id="userService" class="com.ijava.springmvc.service.UserServiceImpl"></bean>
<bean class="org.springframework.jdbc.core.JdbcTemplate">

<property name="dataSource" ref="datasource"></property>
</bean>
</beans>