模拟界面请求到web服务器

package com.lsw.client;import java.io.*;import java.net.*;import java.util.*;public class HTTPClinet { ???public static void main(String[] args){ ???????//确定http请求的uri ???????String uri = "index.html"; ???????if(args.length !=0) ???????????uri = args[0]; ???????????????//按照get请求方式访问httpserver ???????doGet("localhost",8080,uri); ???????} ???//按照get请求方式访问httpserver ???public static void doGet(String host,int port,String uri){ ???????Socket socket = null; ???????????????try{ ???????????//与httpserver建立ftp连接 ???????????socket = new Socket(host,port); ???????} ???????catch(Exception e){ ???????????e.printStackTrace(); ???????} ???????????????try{ ???????????//创建http请求 ???????????//http请求的第一行 ???????????StringBuffer sb = new StringBuffer("GET "+uri+" HTTP/1.1\r\n"); ???????????//http请求头 ???????????sb.append("Accept: */*\r\n"); ???????????sb.append("Accept-Language: zh-cn\r\n"); ???????????sb.append("Accept-Encoding: gzip, deflate\r\n"); ???????????sb.append("User-Agent: HTTPClient\r\n"); ???????????sb.append("Host: localhost:8080\r\n"); ???????????sb.append("Connection: Keep-Alive\r\n\r\n"); ???????????????????????//发送http请求 ???????????OutputStream socketOut = socket.getOutputStream(); //获得输出流 ???????????socketOut.write(sb.toString().getBytes()); ???????????????????????//睡眠2秒，等待响应结果 ???????????Thread.sleep(2000); ???????????????????????//接收响应结果 ???????????InputStream socketIn = socket.getInputStream(); //获得输入流 ???????????int size = socketIn.available(); ???????????byte[] buffer = new byte[size]; ???????????socketIn.read(buffer); ???????????String request = new String(buffer); ???????????System.out.println(request); ???????} ???????catch(Exception e){ ???????????e.printStackTrace(); ???????} ???????finally{ ???????????try{ ???????????????socket.close(); ???????????}catch(Exception e){ ???????????????e.printStackTrace(); ???????????} ???????} ???}}

package com.lsw.server;import java.io.*;import java.net.*;public class HTTPServer { ???public static void main(String[] args){ ???????int port; ???????ServerSocket serverSocket; ???????????????try{ ???????????port = Integer.parseInt(args[0]); ???????????System.out.println("默认端口是： " + port); ???????} ???????catch(Exception e){ ???????????System.out.println("默认端口8080"); ???????????port = 8080; ???????} ???????????????try{ ???????????//创建监听端口 ???????????serverSocket = new ServerSocket(port); ???????????System.out.println("服务器正在监听端口： " + serverSocket.getLocalPort()); ???????????while(true){ ???????????????try{ ???????????????????//等待客户的链接请求 ???????????????????final Socket socket = serverSocket.accept(); ???????????????????System.out.println("建立了一个与客户的新的TCP连接，该客户的地址为: " + socket.getInetAddress() ???????????????????????????+ " 端口为 : " + socket.getPort()); ???????????????????//响应客户请求 ???????????????????service(socket); ???????????????} ???????????????catch(Exception e){ ???????????????????e.printStackTrace(); ???????????????} ???????????} ??????????????????????} ???????catch(Exception e){ ???????????e.printStackTrace(); ???????} ???} ???????public static void service(Socket socket) throws Exception{ ???????//读取HTTP请求信息 ???????InputStream socketIn = socket.getInputStream(); //获得输入流 ???????//睡眠500毫秒，等待http请求 ???????Thread.sleep(500); ???????int size = socketIn.available(); ???????byte[] buffer = new byte[size]; ???????socketIn.read(buffer); ???????String request = new String(buffer); ???????//打印http请求数据 ???????System.out.println("客户端请求的数据为： " +request); ???????????????//解析http请求 ???????//获得http请求第一行 ???????String firstLineOfRequest = request.substring(0,request.indexOf("\r\n")); ???????System.out.println("firstLineOfRequest= " +firstLineOfRequest); ???????//解析http请求的第一行 ???????String[] parts = firstLineOfRequest.split(" "); ???????//解析http请求这种的uri ???????String uri = parts[1]; ???????System.out.println("解析http请求这种的uri=" + uri); ???????System.out.println("截图的值为=" + uri.substring(0, 1).toString()); ???????String flag = uri.substring(0, 1).toString(); ???????if(flag.equals("/")){ ???????????System.out.println("此请求是从浏览器发起的请求"); ???????????uri = uri.substring(1).toString(); ???????} ??????????????????System.out.println("解析http请求这种的uri=" + uri); ???????????????//决定http响应正文的类型，此处作了简化处理 ???????String contentType; ???????if(uri.indexOf("html") != -1 || uri.indexOf("htm") != -1) ???????????contentType ="text/html"; ???????else if(uri.indexOf("jpg") != -1 || uri.indexOf("jpeg") != -1) ???????????contentType ="image/jpeg"; ???????else if(uri.indexOf("gif") != -1) ???????????contentType ="image/gif"; ???????else ???????????contentType = "application/octet-stream"; //字节流类型 ???????????????//创建http响应结果 ???????//创建http响应的第一行 ???????String responseFirstLine = "HTTP/1.1 200 OK\r\n"; ???????//http响应头 ???????String responseHeader = "Content-Type:" +contentType + "\r\n\r\n"; ???????//获得读取响应正文数据的输入流 ???????/*InputStream in = HTTPServer.class.getResourceAsStream(uri); 书上这么写的 ?哎*/ ???????InputStream in = HTTPServer.class.getClassLoader().getResourceAsStream(uri); ???????????????//发送http响应结果 ???????OutputStream socketOut = socket.getOutputStream(); //获得输出流 ???????//发送http响应的第一行 ???????socketOut.write(responseFirstLine.getBytes()); ???????//发送http响应的头 ???????socketOut.write(responseHeader.getBytes()); ???????System.out.println("报文头发送完成"); ???????System.out.println("开始发送http响应的正文"); ???????//发送http响应的正文 ???????int len = 0; ???????buffer = new byte[1024]; ???????try { ???????????while((len=in.read(buffer)) != -1) ???????????????socketOut.write(buffer, 0, len); ???????????????????} catch (Exception e) { ???????????e.printStackTrace(); ???????} ???????System.out.println("完成发送http响应的正文"); ???????//睡眠1秒，等待客户接收http响应结果 ???????Thread.sleep(1000); ???????//关闭tcp连接 ???????socket.close(); ???????????}}

<!DOCTYPE html><html> ?<head> ???<title>hello.html</title> ???????<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> ???<meta http-equiv="description" content="this is my page"> ???<meta http-equiv="content-type" content="text/html; charset=UTF-8"> ???????<!--<link rel="stylesheet" type="text/css" href="./styles.css">--> ?</head> ???<body> ???This is my HTML page. <br> ?</body></html>