动手实现tomcat对于JavaEE初学者来说大家学完JAVASE之后马上进入了

东东呢?tomcattomcat服务器,我们要实现一个Tomcathttp协议和JavaSe的HTTPJavaSeSocketHTTPHTTP协议:网络协议:数据在网络上传输规则http,pop3,pop,imap,ftp,流协HTTP协议:htypertexttransform超文本传输协议:HTML:htypertextmarkupHTTP协议格式:由于我们平时互联网上的网页都是请求之后才响应.所以HTTP协议基于请求-响应模型.协议分为请求部分,响应部分.HTTP协议分为请求部分,响应部分POST/xxx/xxxx/xxx.pnghttp/1.1请求行(/版本 K1:v1(换行K2:v2(换行K3:v3(换行HTTP协议请求头火狐浏览器下 利用火狐===>工具===>web开发者===>"User-Agent:"Mozilla/5.0(WindowsNT6.1;WOW64;rv:46.0) Accept-Encoding:"gzip,deflate,Host:GIF图象格式的资源;Accept:text/html,html文本.Accept-Encoding:告诉服务端,<form<form/aaa”<inputtype=”text”<inputtype=”password””上面的表单中,当我们录入数据之后,点击提交按钮, <form<form”<inputtype=”text”<inputtype=”password””上面的表单中,当我们录入数据之后,点击提交按钮,POSTPOST/aaa K1:v1(换行K2:v2(换行K3:v3(换行 //Not作用:1.格式Date:Date:Fri,21Apr201702:04:54服务端响应到客户端部分,HTML页面,JS文件,CSS文件,SocketHTTPHTTP请求,publicpublicclass{publicstaticvoidmain(String[]args)throwsExceptionSockets=null;InputStreamis=null;trys=newSocket(" inti=is.read();}}catch(Exceptione)}finallyif(null!=is)}}if(null!=s)}}}}XXXXXX如果我们通过浏览器 localhost:8080,8080端口发起请求，服务端向客户端HTTP协议的响应部分publicclassTestServerpublicstaticvoidmain(String[]args)throwsIOException{ServerSocketss=null;Socketsocket=null;OutputStreamops=null;try{ss=newServerSocket(8080);while(true){socket=buffer.append("<ahref='ht }}catch(Exceptione)}finally}}}} *.WebContentdemo.html*.html 的绝对路publicpublicclasspublicstaticfinalStringWEB.ROOT=System.getProperty("user.dir")+"\\"+//publicstaticStringurl=publicstaticvoidmain(String[]args)}创建ServerSocket对象，本机8080端口publicpublicstaticvoidmain(String[]args)try{//ServerSocketserverSocket=newwhile(true)Socketsocket=}}catch(Exceptione)}}HTTPHTTP协议请求部分数据publicstaticpublicstaticvoidmain(String[]args)try{//80ServerSocketserverSocket=newwhile(true)Socketsocket=InputStreaminput=OutputStreamoutput=//获取HTTP协议的请求部分,截取客户端 的资源名称}}catch(Exceptione)}}publicpublicstaticvoidparse(InputStreaminput)throwsIOException{StringBuffercontent=newStringBuffer(2048);intintbyte[]buffer=new//i311i=for(intj=0;j<i;j++)}//打 到的内//demo.htmlStringuri=parseUri(content.toString());//url= }////截取客户端请求资源的路径+publicstaticStringparseUri(StringrequestString)intindex1,index1=requestString.indexOf('');if(index1!=-1){index2=requestString.indexOf('',index1+1);if(index2>index1)}return}HTTP协议响应部分HTTPpublicpublicstaticvoidsendStaticResource(OutputStreamoutput)throwsIOException{byte[]bytes=newbyte[2048];FileInputStreamfis=null;tryif(file.exists()){output.write("Server:Apache-Coyote/1.1\n".getBytes());fis=newFileInputStream(file);intch=fis.read(bytes);while(ch!=-1)output.write(bytes,0,ch);ch=fis.read(bytes);}}else//filenotStringerrorMessage="HTTP/1.1404FileNot+"Content-Type:+"Content-Length:23\r\n"++"<h1>FileNotFound</h1>";}}catch(Exceptione)//thrownifcannotinstantiateaFileobject}finallyif(fis!=}}publicinterfaceServletpublicinterfaceServlet{publicvoidinit();publicvoidservice(InputStreamis,OutputStreamops)throwsIOException;publicvoiddestroy();}publicclassAAServletimplementspublicclassAAServletimplementsServlet{publicvoidinit() }publicvoidservice(InputStreamis,OutputStreamops)throwsIOException{System.out.println("AAservice.");ops.write("Iamfrom }publicvoiddestroy() }}publicpublicclassBBServletimplementsServlet{publicvoidinit() }publicvoidservice(InputStreamis,OutputStreamops)throwsIOException{System.out.println("BBservice...");}publicvoiddestroy() }}2JAVA..服务器启动..publicstaticMap<String,String>map=newpublicstaticMap<String,String>map=newpublicstaticvoidreadConf()throwsException{Propertiesp=newProperties();p.load(newSetkeySet=Itoritor=keySet.itor();while(itor.hasNext()){Stringkey=(String)itor.next();Stringvalue=p.getProperty(key);map.put(key,value);}}publicpublicstaticvoidsendDynamicResource(InputStreamis,OutputStreamops)throwsException{ops.write("HTTP/1.1200OK\n".getBytes())