in future&in the future有啥区别?

强调的远近程度不同

in future 表示“在今后”，强调与从前的对比。
in the future 意为“在将来”，表达一种对未来的想法。

in future:相当于from now on
今后,从今以后
Examples:
1."I hope they'll be more cautious in future," he observed.
他说："我希望他们今后能更慎重一些."
2.I inform you that I have this day removed to.,where all communication shall in future be addressed.
自即日起,已经迁到……,今后来信,请寄该址.特此告知.
3.Keep your opinions to yourself in future!
in the future:
在将来
Examples:
1.The boy wants to become a philosopher in the future.
这个男孩想在将来成为一名哲学家.
2.We learn from the past,experience the present and hope for success in the future.
我们从过去中学习,体验现在,展望未来的成功.
3.Reliance on something in the future; hope.
期待,期望对某事未来的信赖；希望

牛津的解释：
in future (BrE) (AmE in the future) from now on:今后、从今以后之意 (此处in future为英国英语， in the future为美国英语。
例：1）Please be more careful in future. 今后小心
点。
2） In future, make sure the door is never left unlocked.今后一定要注意把门锁上。
in the future:the time that will come after the present or the events that will happen then:在将来、未来
例：No one can foresee what will happen in the future.没人能预见将来会发生什么事。