出现java.sql.SQLException: No suitable driver的几种解决办法

com.mchange.v2.resourcepool.BasicResourcePool

警告: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@5df68463 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:

java.sql.SQLException: No suitable driver

    at java.sql.DriverManager.getDriver(Unknown Source)

    at

com.mchange.v2.resourcepool.BasicResourcePool

警告: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@45637a33 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.

java.sql.SQLException:Connections could not be acquired from the underlying database!

    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)

c3p0-config.xml代码：

<?xmlversion="1.0"encoding="UTF-8"?>

<c3p0-config>

    <default-config>

        <propertyname="driverClass">com.mysql.jdbc.Driver</property>

        <propertyname="jdbcUrl">jdbc:mysql://localhost:3306/Estore</property>

        <propertyname="user">estore</property>

        <propertyname="password">estore</property>

    </default-config>

</c3p0-config>

 原因：（1）很有可能c3p0-config.xml中的配置文件出现问题，比如我是因为把“driverClass”不小心写成了“driver”，

             所以在书写c3p0-config.xml要特别小心，可能多一个空格或者格式稍有问题，都会报以上错误。

             如：驱动类写错、jdbcUrl格式错误等等。

            解决之策：仔细检查书写是否正确！！！

            （2）没有将mysql-connector-java-****-bin.jar包加入到Java运行环境的外部jar包的存放的位置。

              解决之策：在JAVA_HOME目录下的jre\lib\ext文件下（如E:\jdk8\jre\lib\ext）放置一个连接MySQL数据库的jar包mysql- 

                               connector-java-****-bin.jar

             （3）还有一个也就是字面意思：你没有适用的驱动。

                解决之策：检查是否在WebRoot\WEB-INF\lib目录下是否导入了合适的mysql-connector-java-****-bin.jar包，没有则导入再重启服务器即可。

如有错误，欢迎指正！谢谢！