IDEA执行JDBC程序时出现的三种异常原因及解决方法

IDEA执行JDBC程序时出现的三种异常原因及解决方法

• 异常一：java.sql.SQLException

异常代码：

Exception in thread "main" java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' 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:127)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:87)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:61)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:71)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862)
	at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:444)
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230)
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226)
	at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677)
	at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:228)
	at Day29.Demo01_JDBC.Demo01_JDBC.main(Demo01_JDBC.java:14)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'Öйú±ê׼ʱ¼ä' 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 java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:59)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:83)
	at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:128)
	at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2201)
	at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2225)
	at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1391)
	at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:993)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:852)
	... 11 more

异常原因：
系统时间错误，存在时差，具体细节可查看博客：https://blog.youkuaiyun.com/love20yh/article/details/80799610
解决方法：
在jdbc:mysql://localhost:3306/db1后加上?serverTimezone=GMT%2B8，
修改配置文件为jdbc:mysql://localhost:3306/db1?serverTimezone=GMT%2B8。

• 异常二：javax.net.ssl.SSLException

异常代码：

** BEGIN NESTED EXCEPTION ** 

javax.net.ssl.SSLException
MESSAGE: closing inbound before receiving peer's close_notify

STACKTRACE:

javax.net.ssl.SSLException: closing inbound before receiving peer's close_notify
	at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:133)
	at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:311)
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:267)
	at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:258)
	at java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:801)
	at java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:780)
	at com.mysql.cj.protocol.a.NativeProtocol.quit(NativeProtocol.java:1284)
	at com.mysql.cj.NativeSession.quit(NativeSession.java:182)
	at com.mysql.cj.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:1911)
	at com.mysql.cj.jdbc.ConnectionImpl.close(ConnectionImpl.java:730)
	at Day29.Demo01_JDBC.Demo01_JDBC.main(Demo01_JDBC.java:25)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)


** END NESTED EXCEPTION **

异常原因：
新版本的MySQL要求是否进行ssl连接
解决方法：
在jdbc:mysql://localhost:3306/db1?serverTimezone=GMT%2B8后加上&useSSL=false，
修改配置文件为jdbc:mysql://localhost:3306/db1?serverTimezone=GMT%2B8&useSSL=false。

• 异常三：java.sql.SQLException;

异常代码：

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.

异常原因：
异常提示表明：com.mysql.jdbc.Driver已过时，新版本为com.mysql.cj.jdbc.Driver，且Driver类为自动注册，所以注册驱动行程序可不执行。实际上MySQL5版本之后的驱动jar包可省略注册驱动的步骤。
解决方法：
将com.mysql.jdbc.Driver修改为com.mysql.cj.jdbc.Driver，或将注册驱动这行代码删掉。