问题： java异常： com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry ‘oqKQM5LBRj2iwTG6zzGwlgPWuNjE-2019-10-31 14:38:14’ for key ‘openid’
数据库异常： [Err] 1062 - Duplicate entry ‘oqKQM5LBRj2iwTG6zzGwlgPWuNjE-2019-11-01 09:49:59’ for key ‘openid’
原因： 关键字’openid’的重复条目’ oqkqm5lbrj2iwtg6zzlgpwunjj -2019-10-31 14:38:14’ 数据库的表里设置了同一openId不允许出现重复startTime的唯一键，下面这行sql
UNIQUE KEY `openid` (`openid`,`startTime`) USING BTREE解决办法： 推荐的解决办法是：按照表的设计，两个字段添加不重复的字段值 不推荐的解决办法：去修改表的设计
详细问题： com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry ‘oqKQM5LBRj2iwTG6zzGwlgPWuNjE-2019-10-31 14:38:14’ for key ‘openid’ at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at com.mysql.jdbc.Util.handleNewInstance(Util.java:407) at com.mysql.jdbc.Util.getInstance(Util.java:382) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1039) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3603) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3535) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1989) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2150) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2119) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2415) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2333) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2318)
