netty权威指南之一 java io

最近通过学习@李林峰 大神的 《netty权威指南》

对java io 有了进一步的了解，我对其代码加了一些注解和个人的看法。

对netty有了进一步的了解，所以后面有一些对rocketmq和dubbo中协议部分的分析

还是那句话 学习使人进步

本文学习 java io的基础知识，准确的说是socket io  

核心方法

ServerSocket    server.accept()   Socket 

/* * Copyright 2013-2018 Lilinfeng. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.phei.netty.bio; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; /** * @author lilinfeng * @date 2014年2月14日 * @version 1.0 */ public class TimeServer { /** * @param args * @throws IOException */ public static void main(String[] args) throws IOException { int port = 8080; if (args != null && args.length > 0) { try { port = Integer.valueOf(args[0]); } catch (NumberFormatException e) { // 采用默认值 } } ServerSocket server = null; try { server = new ServerSocket(port); System.out.println("The time server is start in port : " + port); Socket socket = null; while (true) { socket = server.accept(); new Thread(new TimeServerHandler(socket)).start(); } } finally { if (server != null) { System.out.println("The time server close"); server.close(); server = null; } } } }

/* * Copyright 2013-2018 Lilinfeng. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.phei.netty.bio; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; /** * @author Administrator * @date 2014年2月14日 * @version 1.0 */ public class TimeServerHandler implements Runnable { private Socket socket; public TimeServerHandler(Socket socket) { this.socket = socket; } /* * (non-Javadoc) * * @see java.lang.Runnable#run() */ @Override public void run() { BufferedReader in = null; PrintWriter out = null; try { in = new BufferedReader(new InputStreamReader( this.socket.getInputStream())); out = new PrintWriter(this.socket.getOutputStream(), true); String currentTime = null; String body = null; while (true) { body = in.readLine(); if (body == null) break; System.out.println("The time server receive order : " + body); currentTime = "QUERY TIME ORDER".equalsIgnoreCase(body) ? new java.util.Date( System.currentTimeMillis()).toString() : "BAD ORDER"; out.println(currentTime); } } catch (Exception e) { if (in != null) { try { in.close(); } catch (IOException e1) { e1.printStackTrace(); } } if (out != null) { out.close(); out = null; } if (this.socket != null) { try { this.socket.close(); } catch (IOException e1) { e1.printStackTrace(); } this.socket = null; } } } }

/* * Copyright 2013-2018 Lilinfeng. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.phei.netty.bio; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; /** * @author lilinfeng * @date 2014年2月14日 * @version 1.0 */ public class TimeClient { /** * @param args */ public static void main(String[] args) { int port = 8080; if (args != null && args.length > 0) { try { port = Integer.valueOf(args[0]); } catch (NumberFormatException e) { // 采用默认值 } } Socket socket = null; BufferedReader in = null; PrintWriter out = null; try { socket = new Socket("127.0.0.1", port); in = new BufferedReader(new InputStreamReader( socket.getInputStream())); out = new PrintWriter(socket.getOutputStream(), true); out.println("QUERY TIME ORDER"); System.out.println("Send order 2 server succeed."); String resp = in.readLine(); System.out.println("Now is : " + resp); } catch (Exception e) { e.printStackTrace(); } finally { if (out != null) { out.close(); out = null; } if (in != null) { try { in.close(); } catch (IOException e) { e.printStackTrace(); } in = null; } if (socket != null) { try { socket.close(); } catch (IOException e) { e.printStackTrace(); } socket = null; } } } }