1,HTTP出口 1.1,HttpURLConnection 1.2,java.net.http.HttpClient 1.3,Apache HttpClient 1.4,OkHttp 1.5,Retrofit 1.6,RestTemplate 1.7,OpenFeign 1.8,forest 2,HTTP入口 2.1,Spring MVC 2.2,Servlet 2.3,AX-RS 2.4,Spark 2.5,Vert.x