连接数据库遇到异常：

java.sql.SQLException: The server time zone value '�й���׼ʱ��' 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.at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:505)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:479)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:489)at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:69)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1606)at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633)at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
Caused by: com.mysql.cj.core.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.at sun.reflect.GeneratedConstructorAccessor7.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)at com.mysql.cj.jdbc.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:118)at com.mysql.cj.mysqla.MysqlaSession.configureTimezone(MysqlaSession.java:293)at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:2399)at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1739)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1596)... 12 more七月 08, 2018 4:00:11 下午 com.mchange.v2.resourcepool.BasicResourcePool
警告: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@29176cc1 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
七月 08, 2018 4:00:11 下午 com.mchange.v2.resourcepool.BasicResourcePool
警告: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@4d60795f -- 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: The server time zone value '�й���׼ʱ��' 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.at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:505)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:479)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:489)at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:69)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1606)at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633)at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
Caused by: com.mysql.cj.core.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.at sun.reflect.GeneratedConstructorAccessor7.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)at com.mysql.cj.jdbc.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:118)at com.mysql.cj.mysqla.MysqlaSession.configureTimezone(MysqlaSession.java:293)at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:2399)at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1739)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1596)... 12 more七月 08, 2018 4:00:11 下午 com.mchange.v2.resourcepool.BasicResourcePool
警告: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@29176cc1 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
七月 08, 2018 4:00:11 下午 com.mchange.v2.resourcepool.BasicResourcePool
警告: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@1e02122f -- 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: The server time zone value '�й���׼ʱ��' 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.at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:505)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:479)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:489)at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:69)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1606)at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633)at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
Caused by: com.mysql.cj.core.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.at sun.reflect.GeneratedConstructorAccessor7.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)at com.mysql.cj.jdbc.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:118)at com.mysql.cj.mysqla.MysqlaSession.configureTimezone(MysqlaSession.java:293)at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:2399)at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1739)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1596)... 12 more七月 08, 2018 4:00:11 下午 com.mchange.v2.resourcepool.BasicResourcePool
警告: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@734e2c5e -- 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: The server time zone value '�й���׼ʱ��' 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.at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:505)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:479)at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:489)at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:69)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1606)at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633)at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
Caused by: com.mysql.cj.core.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���׼ʱ��' 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.at sun.reflect.GeneratedConstructorAccessor7.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54)at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)at com.mysql.cj.jdbc.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:118)at com.mysql.cj.mysqla.MysqlaSession.configureTimezone(MysqlaSession.java:293)at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:2399)at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1739)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1596)... 12 more

解决办法：

原

         jdbcUrl=jdbc:mysql://localhost:3306/secondskill?useUnicode=true&characterEncoding=UTF-8

修改为

jdbcUrl=jdbc:mysql://localhost:3306/secondskill?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai

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