今天在用C3p0連接MySql數據庫 這個時候出現了上面的錯誤，
一般來說這種錯誤有3個方向解決 一般都是db的配置的問題 ，一定要小心DB 的配置
八月 19, 2017 8:30:46 下午 com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask run
警告: com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@2b8dab95 -- 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.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:223)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
1.：（1）很有可能c3p0-config.xml中的配置文件出現問題
這些配置一定要配置正確，像 第一個圖片就忘記了一個“冒號“
2） 將Jar包放入Java lib目錄
在JAVA_HOME目錄下的jre\lib\ext文件下（如E:\jdk8\jre\lib\ext）放置一個連接MySQL數據庫的jar包mysql- connector-java-****-bin.jar
3）Jar 包沒有加入到Buildpath
看jar包是否在Referenced Libraries 里
