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025.MyBatis整合C3P0连接池

非衣所思 2022-11-26 阅读 82

1. pom.xml

<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.4</version>
</dependency>

2.  在com.imooc.mybatis.datasource下新增一个数据源C3P0DataSourceFactory.java

<?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>

<settings>
<!-- goods_id ==> goodsId 驼峰命名转换 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>

<!--启用Pagehelper分页插件-->
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!--设置数据库类型-->
<property name="helperDialect" value="mysql"/>
<!--分页合理化-->
<property name="reasonable" value="true"/>
</plugin>
</plugins>

<!-- 环境,可以配置多个,default:指定采用哪个环境 -->
<environments default="dev">
<!-- id:唯一标识 -->
<environment id="dev">
<!--采用JDBC进行事务的管理commit/rollback-->
<transactionManager type="JDBC"/>
<!-- 数据源,连接池类型的数据源 -->
<!--<dataSource type="POOLED">-->
<dataSource type="com.imooc.mybatis.datasource.C3P0DataSourceFactory">
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
<property name="jdbcUrl"
value="jdbc:mysql://localhost:3306/babytun?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"/>
<property name="user" value="root"/>
<property name="password" value="root"/>

           <property name="initialPoolSize" value="5"/>
           <property name="maxPoolSize" value="20"/>
                  <property name="minPoolSize" value="5"/>

</dataSource>
</environment>

</environments>

<!--声明mapper的配置文件-->
<mappers>
<mapper resource="mappers/goods.xml"/>
<mapper resource="mappers/goods_detail.xml"/>
</mappers>
</configuration>



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