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:
<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>
     <default-config>
         <property name="driverClass">com.mysql.jdbc.Driver</property>
         <property name="jdbcUrl">jdbc:mysql://localhost:3306/Estore</property>
         <property name="user">estore</property>
         <property name="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!







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