这是我的代码 值中的第一个参数id 视频中也是这样写的没有报错,
而我报错了
String sql = "insert into t_user values(null ,'hu',9999)";
这是报错异常
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'id' cannot be null
String sql = "insert into t_user values(null ,'hu',9999)";
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'id' cannot be null