【数据库连接问题之：Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!】的更多相关文章

数据库连接问题之：Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!

要么是驱动问题(没加载到工程中去或者其他问题)要么是账号密码或者url或者driver写错 driver:com.mysql.jdbc.Driver url:jdbc:mysql://localhost:3306/数据库名称…

JavaWeb:c3p0配置问题-----java.sql.SQLException: Connections could not be acquired from the underlying database!

错误原因 c3p0的配置错误 错误显示 -classpath "D:\Program\Software\IntelliJIDEA\IntelliJ IDEA 2018.2.5\lib\idea_rt.jar;D:\Program\Software\IntelliJIDEA\IntelliJ IDEA 2018.2.5\plugins\junit\lib\junit-rt.jar;D:\Program\Software\IntelliJIDEA\IntelliJ IDEA 2018.2.5\plu…

dea创建Maven工程用c3p0连接数据库报错java.sql.SQLException: Connections could not be acquired from the underlying

idea   java.sql.SQLException: Connections could not be acquired from the underlying database! 转载自:https://blog.csdn.net/iXinRu/article/details/82624112 把c3p0-config.xml放到resources下面即可…

Caused by: java.sql.SQLException: Couldn't perform the operation getAutoCommit: You can't perform any operations on this connection. It has been automatically closed by Proxool for some reason (see lo

系统启动,一段时间不操作,然后在来操作时,报错如下: Caused by: java.sql.SQLException: Couldn't perform the operation getAutoCommit: You can't perform any operations on this connection. It has been automatically closed by Proxool for some reason (see logs). at org.logicalcobw…

Caused by: java.sql.SQLException: ResultSet is from UPDATE. No Data.

1.错误描述 org.hibernate.exception.GenericJDBCException: error executing work at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(Sql…

Caused by: java.sql.SQLException: Field 'id' doesn't have a default value

1.错误描述 org.hibernate.exception.GenericJDBCException: error executing work at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(Sql…

Caused by: java.sql.SQLException: Incorrect integer value: '' for column 'clientId' at row 41

1.错误描述 [ERROR:]2015-06-10 13:48:26,253 [异常拦截] oa.exception.ExceptionHandler org.hibernate.exception.GenericJDBCException: error executing work at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.jav…

Caused by: java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0

1.错误描述 [ERROR:]2015-05-05 16:35:50,664 [异常拦截] org.hibernate.exception.GenericJDBCException: error executing work at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) at org.hibernate.engine.…

Caused by: java.sql.SQLException: Operand should contain 1 column(s)

1.错误描述 [ERROR:]2015-05-05 15:48:55,847 [异常拦截] org.hibernate.exception.DataException: error executing work at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:135) at org.hibernate.exception.internal.…

Caused by:java.sql.SQLException:ORA-01008:并非所有变量都已绑定

1.错误描述 Caused by:java.sql.SQLException:ORA-01008:并非所有变量都已绑定 2.错误原因 3.解决办法…