排除 1.mysql 是utf8 2.连接url加了useUnicode=true&&characterEncoding=utf8 3.项目也没有用到utf8mb4 由于是mysql驱动版本5.1.30版本报错,换成5.1.6就好了…

今天在使用mysql数据库查找数据的时候报错,错误信息如下: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'dd' in 'where clause' at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newI…

严重: Servlet.service() for servlet jsp threw exceptioncom.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column '??????' in 'field list'    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)    at sun.reflect.Nati…

1.错误描述 INFO:2015-05-01 14:20:44[main] - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> nu…

1.错误原因 [ERROR:]2015-04-18 13:20:31,883 [异常拦截] com.skycloud.oa.exception.ExceptionHandler org.hibernate.exception.SQLGrammarException: error executing work at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.j…

1.错误描述 2014-7-12 21:06:05 com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager 信息: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000,…

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'test' 报错原因是:MySQL数据库没有 创建 test 数据库 解决办法:在MySQL中创建test:create database test…

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column …… 出现这个异常的很大可能性是 数据库是没有问题的!关键原因是:你从传过来的参数是String类型的,我们在操作数据库时String类型的参数必须要用' '把参数引起来才能传递并接收!    例如rs=stmt.executeQuery("select * from userinfo where userid = '"+ID+"…

在使用mybatis框架做查询的时候,出现了如下错误: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 's.areaname' in 'field list' at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_144] at sun.reflect.NativeConstructo…

1.错误描写叙述 2014-7-12 21:06:05 com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager 信息: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 100…