(This resource explains in detail how to use the socket class to implement the use of HTTP protocol clients. Implement HTTP protocol client using Socket class The Http client program has been integrated in the Java language and can be called through the URLConnection class. Unfortunately, since SUN has not released the source code of the Http client program, the details of its implementation are still a mystery. Based on the HTTP protocol specification, this article uses the Java.Socket class to implement an HTTP protocol client program. ………………)