How to separate front and rear development?

background:

    1,springmvc(javaweb),//,/.jspajax,;
    2,java,,;
    3,(),(svn);

question:

    1,(),,,;
    2,,?,;
    3,java??

    vuejs+elementui,axiostoken,vue-router,.
    webpack,tomcat;

I need your answers:

    1,2?
    2,3;
    3,,?
    4,??
    5,.

Thank you! Have a good day!

Mar.09,2021

it's nice to have such a separation of small projects.

the back-end implementation logic provides the interface, and the front-end calls the interface to present the data.

permissions are implemented in the background, of course. For more information, please see https://codeshelper.com/q/10.

advice and advice are:
1. Long-distance cooperation and communication
2. The interface documentation should be detailed and clear

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