Initializing c3p0 pool...报错

项目启动停在Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource ...后报错

　　今天在IDEA启动Spring测试项目时，在com.machabge.v2......缓冲了一段时间，缓冲后报错

解决方案：

　　1、打开cmd查看maven是否配置成功 命令：mvn -v

　　

 

 　　2、找到maven安装时(文件)的目录

　　　　a、找到文件目录的conf文件夹

　　　　b、找到settings.xml

　　　　c、修改

  <mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
     |
    <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
    </mirror>
     -->
     <mirror>
    <id>aliyun-public</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun public</name>
    <url>https://maven.aliyun.com/repository/public</url>
</mirror>

<mirror>
    <id>aliyun-central</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun central</name>
    <url>https://maven.aliyun.com/repository/central</url>
</mirror>

<mirror>
    <id>aliyun-spring</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun spring</name>
    <url>https://maven.aliyun.com/repository/spring</url>
</mirror>

<mirror>
    <id>aliyun-spring-plugin</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun spring-plugin</name>
    <url>https://maven.aliyun.com/repository/spring-plugin</url>
</mirror>

<mirror>
    <id>aliyun-apache-snapshots</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun apache-snapshots</name>
    <url>https://maven.aliyun.com/repository/apache-snapshots</url>
</mirror>

<mirror>
    <id>aliyun-google</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun google</name>
    <url>https://maven.aliyun.com/repository/google</url>
</mirror>

<mirror>
    <id>aliyun-gradle-plugin</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun gradle-plugin</name>
    <url>https://maven.aliyun.com/repository/gradle-plugin</url>
</mirror>

<mirror>
    <id>aliyun-jcenter</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun jcenter</name>
    <url>https://maven.aliyun.com/repository/jcenter</url>
</mirror>

<mirror>
    <id>aliyun-releases</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun releases</name>
    <url>https://maven.aliyun.com/repository/releases</url>
</mirror>

<mirror>
    <id>aliyun-snapshots</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun snapshots</name>
    <url>https://maven.aliyun.com/repository/snapshots</url>
</mirror>  

<mirror>
    <id>aliyun-grails-core</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun grails-core</name>
    <url>https://maven.aliyun.com/repository/grails-core</url>
</mirror>

<mirror>
    <id>aliyun-mapr-public</id>
    <mirrorOf>*</mirrorOf>
    <name>aliyun mapr-public</name>
    <url>https://maven.aliyun.com/repository/mapr-public</url>
</mirror>
  </mirrors>

　　3、查看Mysql版本

　　

 

 　　4、修改项目pom.xml配置文件,修改为和mysql同一版本的

　　　　<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.12</version>
    　　</dependency>

　　5、再次运行测试项目即可

　　

 

 注意：

　　还可以试下修改数据库驱动

　　

　　<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--连接数据库必备信息-->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/db?serverTimezone=GMT%2B8"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
    </bean>