1. 准备jar包及目录结构
2. 配置db.properties
driver = com.mysql.jdbc.Driver
url = jdbc:mysql://127.0.0.1:3306/Howl
name = root
password =
3. 配置applicationContext.xml
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:db.properties" />
<!--spring自带数据源,没有连接池功能 -->
<!-- <bean id="DataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driver}"></property>
<property name="url" value="${url}"></property>
<property name="username" value="${name}"></property>
<property name="password" value="${password}"></property>
</bean> -->
<!-- c3p0数据源，推荐 -->
<bean id="DataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${driver}"/>
<property name="jdbcUrl" value="${url}"/>
<property name="user" value="${name}"/>
<property name="password" value="${password}"/>
</bean>
<!-- 配置SqlSessionFactory,加载mybaits配置文件和映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis.xml"/>
<property name="dataSource" ref="DataSource"/>
</bean>
4. 创建Bean对象
package bean;
public class User {
private int id;
private String name;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", password=" + password + "]";
}
}
5. 配置Mapper.xml文件（Mapper代理方式）
<mapper namespace="com.howl.UserMapper">
<!-- 通过id查询用户 -->
<select id="findUserById" parameterType="Integer" resultType="bean.User">
select * from user where id = #{id}
</select>
</mapper>
6. 代理接口
package com.howl;
public interface UserMapper {
public User findUserById(int id);
}
7. 配置Mybatis.xml
<!-- 根标签 -->
<configuration>
<!-- 引入mapper文件的位置 -->
<mappers>
<mapper resource="Mapper/UserMapper.xml"/>
</mappers>
</configuration>
8. 测试
//获取sqlSession
ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
SqlSessionFactory sqlSessionFactory = (SqlSessionFactory ) ac.getBean("sqlSessionFactory");
SqlSession sqlSession = sqlSessionFactory.openSession();
//获取代理对象
UserMapper userMapper = sqlSession.getMapper(com.howl.UserMapper.class);
User user = userMapper.findUserById(46);
//打印Bean对象
System.out.println(user);
9. 打印
<!-- 整合成功 -->
<!-- 十二月 04, 2019 8:30:35 下午 com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource -->
User [id=46, name=123123, password=123123]
