Question

jdbc 事务commit之后还能rollback吗

比如
条件1
mydb.rollback();
。。。。
条件2
mydb.rollback();

mydb.commit();

这样条件1和条件2的还会回滚吗

Answer 1

不可以同时用

如果要rollback，必须设置
conn.setAutoCommit (false);

void java.sql.Connection.setAutoCommit(boolean
autoCommit) throws SQLException

Sets this connection's auto-commit mode to the given state. If a connection
is in auto-commit mode, then all its SQL statements will be executed and
committed as individual transactions. Otherwise, its SQL statements are grouped
into transactions that are terminated by a call to either the method
commit or the method rollback. By default, new
connections are in auto-commit mode.

Answer 2

请认真理解这句话：结束事务的标志是提交或回滚。