MyBatis动态连接数据库，动态传入数据库参数

配置MyBatis时，一般都会将数据库参数放在配置文件中，如jdbc.properties，然后通过载入配置文件的方式获取参数：

<?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>
<!--
<properties resource="mybatis/jdbc.properties"/>
-->

<typeAliases>
<typeAlias alias="userTpm" type="com.test.tool.common.tpm.UserTpm"/>
</typeAliases>

<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>

<mappers>
<mapper resource="com/test/tool/dsm/UserDsm.xml"/>
</mappers>
</configuration>

jdbc.properties文件内容如下：

jdbc.driver=xxxx

jdbc.url=xxxxxx

jdbc.username=xxxx

jdbc.password=xxxx

现在想要
动态修改
数据库连接的参数
，不使用jdbc.properties中的参数，代码如下：

//动态配置数据库参数

Properties properties = new Properties();

properties.setProperty("jdbc.driver", "动态设置");

properties.setProperty("jdbc.url", "动态设置");

properties.setProperty("jdbc.username", "动态设置");

properties.setProperty("jdbc.password", "动态设置");

//加载mybatis配置文件和映射文件

String resource = "mybatis/mybatis-config.xml";

Reader reader = Resources.getResourceAsReader(resource);

SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();

SqlSessionFactory factory = builder.build(reader, properties);

SqlSession session = factory.openSession();

//获取对象

userDsm = session.getMapper(UserDsm.class);

......

userDsm.addUser(...);

......