为什么我的Naicat初始化连接不是10个

<?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>
    <!--开发驼峰命名转化-->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <environments default="dev">
        <!--开发环境配置-->
        <environment id="dev">
            <!--事务管理器采用JDBC连接方式-->
            <transactionManager type="jdbc"></transactionManager>
            <!--利用mybatis自带连接池管理连接-->
            <dataSource type="com.oa.datasource.DruidDataSourceFactory">
                <!--jdbc连接属性-->
                <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/oa?serverTimezone=Asia/Shanghai&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
                <property name="username" value="root"/>
                <property name="password" value="12358"/>
                <property name="initialSize" value="10"/>
                <property name="maxActive" value="20"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="mappers/test.xml"/>
    </mappers>
</configuration>