ERROR - maxIdle is deprecated

Question

最初报错：
ERROR - maxIdle is deprecated
[Druid-ConnectionPool-Create-584226706] ERROR - create connection error, url: jdbc:mysql://127.0.0.1:3306/ssmzj16r?useUnicode=true&characterEncoding=UTF-8&tinyInt1isBit=false, errorCode 0, state 08001
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.
修改了pom.xml里对应MySQL的版本后依然报错ERROR - maxIdle is deprecated
看了网上的教程说要删除properties中maxIdle=？,但是我并没有找到相关的配置。
config.properties:
validationQuery=SELECT 1
jdbc_url=jdbc:mysql://127.0.0.1:3306/fyxc?useUnicode=true&characterEncoding=UTF-8&useSSL=true&tinyInt1isBit=false&serverTimezone=UTC
jdbc_username=root
jdbc_password=

pom.xml:
<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>5.0.0.RELEASE</spring.version>
        <junit.version>4.12</junit.version>
        <druid.version>1.1.0</druid.version>
        <fastjson.version>1.2.8</fastjson.version>
        <mybaitsplus.version>2.3</mybaitsplus.version>
        <mysql.version>8.0.22</mysql.version>
        <log4j.version>1.2.17</log4j.version>
        <slf4j.version>1.7.19</slf4j.version>
        <aspectjweaver.version>1.8.8</aspectjweaver.version>
        <fileupload.version>1.3.1</fileupload.version>
        <jstl.version>1.2</jstl.version>
    </properties>

Answer 1

application.properties或者xml或者yml文件配置里看有没有maxIdle=？
没有的话看一下pom.xml里的这个配置对不对

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.22</version>
</dependency>