java中mybatis怎么连接mysql数据库

import java.sql.Connection

import java.sql.DriverManager

import java.sql.SQLException

public class ConnectionDemo{

// 定义MySQL的数据库驱动程序

public static final String DBDRIVER = "org.gjt.mm.mysql.Driver"

// 定义MySQL数据库的连接地址

public static final String DBURL = "jdbc:mysql://localhost:3306/mldn"

// MySQL数据库的连接用户名

public static final String DBUSER = "root"

// MySQL数据库的连接密码

public static final String DBPASS = "mysqladmin"

public static void main(String args[]){

Connection conn = null // 数据库连接

try{

Class.forName(DBDRIVER) // 加载驱动程序

}catch(ClassNotFoundException e){

e.printStackTrace()

}

try{

conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS)

}catch(SQLException e){

e.printStackTrace()

}

System.out.println(conn) // 如果此时可以打印表示连接正常

try{

conn.close() // 数据库关闭

}catch(SQLException e){

e.printStackTrace()

}

}

}

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>

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