一个请求被拦截后，可以做很多操作，这里讨论的场景是外部对接的请求参数是加密数据，返回结果也是加密数据，如何把两块数据让应用无感？拦截后加密，解密。
https://www.cnblogs.com/Eric-zhao/p/11679643.html
https://www.jb51.net/article/216183.htm
https://blog.csdn.net/ww_1997/article/details/116006445
https://juejin.cn/post/6844903950267252749
https://howtodoinjava.com/java/servlets/httpservletrequestwrapper-example-read-request-body
https://medium.com/@vijayakumar-psg587/fiddling-with-httpresponses-in-java-2a269cd5a474
https://blog.csdn.net/qq_33206732/article/details/78623042?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2~default~CTRLIST~default-1.pc_relevant_default&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2~default~CTRLIST~default-1.pc_relevant_default&utm_relevant_index=2