Use okhttp3, request a https site error, such as this https://test_test.test.com ,
Baidu can not question why I wrote this to the Chinese contribution to the world about how to solve
or to learn English .......
https://stackoverflow.com/questions/51563859/javax-net-ssl-sslhandshakeexception-java- lang-illegalargumentexception-invalid
ah inside _ underscore the domain name becomes - on the line