@byerer

// @Transactional(rollbackFor = Exception.class,isolation = Isolation.READ_COMMITTED)
public void addBalanceByVersion(Long id, BigDecimal amount) {
//乐观锁 没有 for update
long systemTime = System.currentTimeMillis();
boolean flag = false;
while (System.currentTimeMillis() - systemTime < waitTime) {
flag = updateBalanceCheckVersion(id, amount);
if (flag) {
break;
}
try {
Thread.sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
if (!flag) {
throw new BizException("加款超时，稍后再试");
}

}

要么不用事务，要么就加上 isolation = Isolation.READ_COMMITTED
都用事务了 老老实实的 select for update 或者 update xx set balance = balance - amount . 如果要记录流水还是 行锁。