BIO底层原理

coderbruis · coderbruis · commit 3ecfc4528a2d · 2021-01-15T15:44:37.000+08:00
diff --git a/JdkLearn/src/main/java/com/learnjava/io/bio/BIO.java b/JdkLearn/src/main/java/com/learnjava/io/bio/BIO.java
@@ -0,0 +1,47 @@
+package com.learnjava.io.bio;
+
+import java.io.InputStream;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * @author lhy
+ *
+ * 在windows服务器下，可以使用telnet来合serversocket建立连接
+ */
+public class BIO {
+    public static void main(String[] args) throws Exception {
+        ServerSocket serverSocket = new ServerSocket(666);
+        System.out.println("Server started...");
+        while (true) {
+            System.out.println("socket accepting...");
+            Socket socket = serverSocket.accept();
+            new Thread(new Runnable() {
+                @Override
+                public void run() {
+                    try {
+                        byte[] bytes = new byte[1024];
+                        InputStream inputStream = socket.getInputStream();
+                        while (true) {
+                            System.out.println("reading...");
+                            int read = inputStream.read(bytes);
+                            if (read != -1) {
+                                System.out.println(new String(bytes, 0, read));
+                            } else {
+                                break;
+                            }
+                        }
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    } finally {
+                        try {
+                            socket.close();
+                        } catch (Exception e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+            }).start();
+        }
+    }
+}
diff --git a/note/Netty/IO底层原理.md b/note/Netty/IO底层原理.md
@@ -0,0 +1,52 @@
+## 从linux kernel内核出发，IO底层原理
+
+### 1. BIO
+
+```
+import java.io.InputStream;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * @author lhy
+ *
+ * 在windows服务器下，可以使用telnet来合serversocket建立连接
+ */
+public class BIO {
+    public static void main(String[] args) throws Exception {
+        ServerSocket serverSocket = new ServerSocket(666);
+        System.out.println("Server started...");
+        while (true) {
+            System.out.println("socket accepting...");
+            Socket socket = serverSocket.accept();
+            new Thread(new Runnable() {
+                @Override
+                public void run() {
+                    try {
+                        byte[] bytes = new byte[1024];
+                        InputStream inputStream = socket.getInputStream();
+                        while (true) {
+                            System.out.println("reading...");
+                            int read = inputStream.read(bytes);
+                            if (read != -1) {
+                                System.out.println(new String(bytes, 0, read));
+                            } else {
+                                break;
+                            }
+                        }
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    } finally {
+                        try {
+                            socket.close();
+                        } catch (Exception e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+            }).start();
+        }
+    }
+}
+```
+
