配置Spring数据源遇到的那些坑。。。

Mon Nov 27 21:42:01 CST 2017 WARN: Establishing SSL connection without server‘s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn‘t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false‘. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Mon Nov 27 21:42:02 CST 2017 WARN: Establishing SSL connection without server‘s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn‘t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false‘. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Mon Nov 27 21:42:02 CST 2017 WARN: Establishing SSL connection without server‘s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn‘t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false‘. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Mon Nov 27 21:42:02 CST 2017 WARN: Establishing SSL connection without server‘s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn‘t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false‘. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

Loading class `com.mysql.jdbc.Driver‘. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver‘. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

 1 27-Nov-2017 21:58:49.667 警告 [C3P0PooledConnectionPoolManager[identityToken->1hgefi99r1yeux661are7zk|12876430]-HelperThread-#0] com.mchange.v2.resourcepool.BasicResourcePool. com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@74bb9e1f -- 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 (10). Last acquisition attempt exception: 
 2  java.sql.SQLException: The server time zone value ‘???ú±ê×??±??‘ is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
 3     at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:121)
 4     at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
 5     at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:81)
 6     at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:55)
 7     at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:65)
 8     at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:70)
 9     at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:853)
10     at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:440)
11     at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:241)
12     at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:221)
13     at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
14     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
15     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
16     at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
17     at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
18     at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
19     at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
20     at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
21     at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
22 Caused by: com.mysql.cj.core.exceptions.InvalidConnectionAttributeException: The server time zone value ‘???ú±ê×??±??‘ is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
23     at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown Source)
24     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
25     at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
26     at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54)
27     at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)
28     at com.mysql.cj.core.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:118)
29     at com.mysql.cj.mysqla.MysqlaSession.configureTimezone(MysqlaSession.java:360)
30     at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1434)
31     at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:986)
32     at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:843)
33     ... 12 more
34 
35 27-Nov-2017 21:58:49.669 严重 [C3P0PooledConnectionPoolManager[identityToken->1hgefi99r1yeux661are7zk|12876430]-HelperThread-#0] com.mchange.v2.resourcepool.BasicResourcePool. A RESOURCE POOL IS PERMANENTLY BROKEN! [com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@74bb9e1f] (because a series of 10 acquisition attempts failed.)
36 27-Nov-2017 21:58:49.671 严重 [C3P0PooledConnectionPoolManager[identityToken->1hgefi99r1yeux661are7zk|12876430]-HelperThread-#0] com.mchange.v2.resourcepool.BasicResourcePool. com.mchange.v2.resourcepool.BasicResourcePool@7f3d74fe -- Unexpectedly broken!!!
37  com.mchange.v2.resourcepool.ResourcePoolException: Unexpected Break Stack Trace!
38     at com.mchange.v2.resourcepool.BasicResourcePool.unexpectedBreak(BasicResourcePool.java:974)
39     at com.mchange.v2.resourcepool.BasicResourcePool.access$1000(BasicResourcePool.java:44)
40     at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1927)
41     at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
42 
43 27-Nov-2017 21:58:49.678 信息 [http-nio-8080-exec-4] com.mchange.v2.resourcepool.BasicResourcePool. com.mchange.v2.resourcepool.BasicResourcePool@7f3d74fe -- an attempt to checkout a resource was interrupted, because the pool is now closed. [Thread: http-nio-8080-exec-4]

 1 ###### C3P0 MySQL CONFIG #######
 2 jdbc.driverClassName=com.mysql.cj.jdbc.Driver
 3 jdbc.url=jdbc:mysql://localhost/localstudent?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
 4 jdbc.username=root
 5 jdbc.password=123456
 6 
 7 connection.initialPoolSize=1
 8 connection.minPoolSize=1
 9 connection.maxPoolSize=5
10 connection.acquireIncrement=2
11 connection.acquireRetryAttempts=10
12 connection.acquireRetryDelay=1000
13 connection.maxIdleTime=3600
14 connection.idleConnectionTestPeriod=20
15 connection.maxStatements=0
16 connection.maxStatementsPerConnection=0

 1 <!-- 获取mysql数据库连接池配置信息 -->
 2     <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
 3         <property name="locations" value="classpath:config/jdbc.properties"/>
 4     </bean>
 5     <!-- 配置c3p0数据源连接池 -->
 6     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
 7           destroy-method="close">
 8         <property name="driverClass" value="${jdbc.driverClassName}"/>
 9         <property name="jdbcUrl" value="${jdbc.url}"/>
10         <property name="user" value="${jdbc.username}"/>
11         <property name="password" value="${jdbc.password}"/>
12         <property name="initialPoolSize" value="${connection.initialPoolSize}"/>
13         <property name="minPoolSize" value="${connection.minPoolSize}"/>
14         <property name="maxPoolSize" value="${connection.maxPoolSize}"/>
15         <property name="acquireIncrement" value="${connection.acquireIncrement}"/>
16         <property name="acquireRetryAttempts" value="${connection.acquireRetryAttempts}"/>
17         <property name="acquireRetryDelay" value="${connection.acquireRetryDelay}"/>
18         <property name="maxIdleTime" value="${connection.maxIdleTime}"/>
19         <property name="idleConnectionTestPeriod" value="${connection.idleConnectionTestPeriod}"/>
20         <property name="maxStatements" value="${connection.maxStatements}"/>
21         <property name="maxStatementsPerConnection" value="${connection.maxStatementsPerConnection}"/>
22         <property name="preferredTestQuery" value="select 1"/>
23         <property name="breakAfterAcquireFailure" value="true"/>
24         <property name="testConnectionOnCheckout" value="false"/>
25     </bean>