Java Network Programming (client and server-side principles)

The browser side enters its own host's IP address + port number (8888), will see the data returned by the server, the Eclipse console will print the information received,

With our custom server, you can see the format of the request information that the browser sends to the server:

Request line ....
The get/http/1.1 request method/myweb/1.html The requested resource path for the HTTP protocol version.
The request message header. Property Name: Property value

The output of the Eclipse console:

192.168.2.103....connected//This is the output of my own program.
get/http/1.1//Request mode, compliance with HTTP Protocol, browser access according to specified protocol, send message to server side
host:192.168.2.103:8888
Connection:keep-alive
Cache-control:max-age=0
accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Upgrade-insecure-requests:1
user-agent:mozilla/5.0 (Windows NT 6.1) applewebkit/537.36 (khtml, like Gecko) chrome/49.0.2623.108 safari/537.36// Supported browsers and their versions
Accept-encoding:gzip, deflate, sdch//browser-side supported file compression method
accept-language:zh-cn,zh;q=0.8//supported languages on the browser side

Blank line This empty line must have to be used to distinguish the request header from the request body
Request Body ...
Specific implementation code:

1PackageWebprogramingdemo;23ImportJava.io.IOException;4ImportJava.io.InputStream;5ImportJava.io.PrintWriter;6ImportJava.net.ServerSocket;7ImportJava.net.Socket;89PublicClassMytomcat {1011/**12*@paramArgs13*@throwsIOException14*/15//All content sent by the browser is printed16PublicStaticvoid Main (string[] args)ThrowsIOException {17ServerSocket SS =New ServerSocket (8888);Socket s =Ss.accept ();20System.out.println (S.getinetaddress (). Gethostaddress ()+ ".... Connected");InputStream in =S.getinputstream ();23byte[] buf =Newbyte[1024];24int len = In.read (BUF); 25 System.out.println (new String (buf, 026 // give the client a feedback message 27 PrintWriter out = new PrintWriter (S.getoutputstream (), true); 28 out.println ("Welcome to Mytomcat Server" 29  S.close ();  Ss.close (); }32 33}   

Java Network Programming (client and server-side principles)