**1.依賴管理** ~~~ <!-- https://mvnrepository.com/artifact/com.mchange/c3p0 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.5</version> </dependency> ~~~ **2.創建數據源工廠** ~~~ package com.nobb.datasource; import com.mchange.v2.c3p0.ComboPooledDataSource; import org.apache.ibatis.datasource.unpooled.UnpooledDataSourceFactory; public class C3p0DataSourceFactory extends UnpooledDataSourceFactory { public C3p0DataSourceFactory() { //使用c3p0數據源 this.dataSource = new ComboPooledDataSource(); } } ~~~ **3.配置連接信息** ~~~ <!-- 環境配置的父元素,可以配置多套環境 default屬性: 指定某一套配置為默認配置 --> <environments default="development"> <!-- 一個environment元素就是一套環境配置,可以配置多套 id:為當前環境配置起一個名字 --> <environment id="development"> <!-- 事務管理方式 --> <transactionManager type="JDBC"/> <!-- 數據源配置,使用連接池 --> <dataSource type="com.nobb.datasource.C3p0DataSourceFactory"> <!-- 四大連接信息配置 --> <property name="driverClass" value="${driverClass}"/> <property name="jdbcUrl" value="${jdbcUrl}"/> <property name="user" value="${user}"/> <property name="password" value="${password}"/> </dataSource> </environment> </environments> ~~~