Java内容重新整理删除过期的东西

2026-02-06 03:54:22 +08:00 · 2025-09-14 03:49:42 -04:00
parent 9b8524ff80
commit 885b795e45
413 changed files with 643 additions and 1340 deletions
--- a/Java/JavaDemo/codedemo/reactor/Reactor.java
+++ b/Java/JavaDemo/codedemo/reactor/Reactor.java
@@ -0,0 +1,113 @@
+package cn.aofeng.demo.reactor;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.Selector;
+import java.nio.channels.ServerSocketChannel;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * 负责Echo Server启动和停止 ，ACCEPT和READ事件的分派。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">NieYong </a>
+ */
+public class Reactor {
+    
+    private final static Logger logger = Logger.getLogger(Reactor.class.getName());
+    
+    // 监听端口
+    private int _port;
+    
+    // {@link Selector}检查通道就绪状态的超时时间（单位：毫秒）
+    private int _selectTimeout = 3000;
+    
+    // 服务运行状态
+    private volatile boolean _isRun = true;
+    
+    /**
+     * @param port 服务监听端口。
+     */
+    public Reactor(int port) {
+        this._port = port;
+    }
+    
+    public void setSelectTimeout(int selectTimeout) {
+        this._selectTimeout = selectTimeout;
+    }
+    
+    /**
+     * 启动服务。
+     */
+    public void start() {
+        ServerSocketChannel serverChannel = null;
+        try {
+            serverChannel = ServerSocketChannel.open();
+            serverChannel.configureBlocking(false);
+            ServerSocket serverSocket = serverChannel.socket();
+            serverSocket.bind(new InetSocketAddress(_port));
+            _isRun = true;
+            if (logger.isLoggable(Level.INFO)) {
+                logger.info("NIO echo网络服务启动完毕，监听端口：" +_port);
+            }
+            
+            Selector selector = Selector.open();
+            serverChannel.register(selector, SelectionKey.OP_ACCEPT, new Acceptor(selector, serverChannel));
+            
+            while (_isRun) {
+                int selectNum = selector.select(_selectTimeout);
+                if (0 == selectNum) {
+                    continue;
+                }
+                
+                Set<SelectionKey> selectionKeys = selector.selectedKeys();
+                Iterator<SelectionKey> it = selectionKeys.iterator();
+                while (it.hasNext()) {
+                    SelectionKey selectionKey = (SelectionKey) it.next();
+                    
+                    // 接受新的Socket连接
+                    if (selectionKey.isValid() && selectionKey.isAcceptable()) {
+                         Acceptor acceptor = (Acceptor) selectionKey.attachment();
+                         acceptor.accept();
+                    }
+                    
+                    // 读取并处理Socket的数据
+                    if (selectionKey.isValid() && selectionKey.isReadable()) {
+                        Reader reader = (Reader) selectionKey.attachment();
+                        reader.read();
+                    }
+                    
+                    // 移除已经处理过的Key
+                    it.remove();
+                } // end of while iterator
+            }
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, "处理网络连接出错", e);
+        }
+    }
+    
+    /**
+     * 停止服务。
+     */
+    public void stop() {
+        _isRun = false;
+    }
+    
+    public static void main(String[] args) {
+        if (1 != args.length) {
+            logger.severe("无效参数。使用示例：\n    java cn.aofeng.demo.reactor.Reactor 9090");
+            System.exit(-1);
+        }
+        int port = Integer.parseInt(args[0]);
+        int selectTimeout = 1000;
+        
+        Reactor reactor = new Reactor(port);
+        reactor.setSelectTimeout(selectTimeout);
+        reactor.start();
+    }
+
+}