利用netty自己手写一个tomcat

基于javaee基础上运行的一个web容器

http  服务器

socktet上支持 TCP/IP HTTP FTP

接受客户端的一个http url请求，对应后台有一个servlet

netty属于协议层，底层框架。

request  response

4.0版本

public class  DNTomcat{

 public void start(int port){

  Event LoopGroup bossGroup=new NioEventLoopGroup();

EventLoopGroup  workGroup=new NioEventLoopGroup();

ServerBootstrap b=new ServerBootstrap();

b.group(bossGroup,workGroup).channel(NioServerSocketChannel.class).

childHandler(new ChannelInitializer<SocketChannel> (){

protected void initChannel(SocketChannel args0) throws Excepton{

sc.pipeline().addLast(new HttpResponseEncoder());

sc.pipeline().addLast(new HttpRequestDecoder());

sc.pipeline().addLast(new DNTomcatHandler());

}})

.option(ChannelOption.SO_+BACKLOG,128)

.childOption(ChannelOption.SO_KEEPALIVE,true);

ChannelFutrue f=b.bind(port).sync();

f.channel

}

}

public class DNResponseP

 

}

public class DNTomcatHandler  

web.xml

<server-mapping>

</server-mapping>

name 

className

private static final Map<Pattern,Class<?>> 

Pattern=pattern.replacAll("\\.",*");

String className=CustomConfig.getString("servlet");

if(!ServletMapping.containsKey(pattern)

servletMapping.put())

static{

 for(String key:CustomConfig.getKeys()){

 if(key.startWith("servlet")){

String name=key.replaceFirst("servlet","");

else{

continue;

String pattern=CustomConig.getString("servlet"+name+"urlPattern");

String className=CustomConfig.getString("Servlet.");

for(Entry<Pattern,Clas<?> entry:servletMapping.entrySet()){

if(entry.getKey().matcher(uri).matches()){

DNServlet serlet (DNServlet)entry.getValue().newInstancse();

if("get".equesIgnoreCase(method)){

 servlet.doGet(request,response);

}else{

servlet.doPost(request,response);

}?

if(!hasPattern){

String out=String.format("404not Found,URL:%S,method:%S",uri,method);

}

serlvet.fist.urlPattern=/first/quey*