2.3.9 异常处理：泛化的捕获异常

license/src/main/java/iot/sixiang/license/net/TcpClient.java

@@ -26,22 +26,22 @@ public class TcpClient {
 		Thread thread = new Thread(new Runnable() {
 			@Override
 			public void run() {
-				try {
 					EventLoopGroup eventLoopGroup = new NioEventLoopGroup();
 					Bootstrap bootstrap = new Bootstrap();
+				try {
 					bootstrap
 					.channel(NioSocketChannel.class)
 					.option(ChannelOption.SO_KEEPALIVE, true)
 					.group(eventLoopGroup)
 					.remoteAddress(host, port)
 					.handler(channelInitializer);
-					ChannelFuture future = bootstrap.connect(host, port);
-					future.addListener(connectionListener);
-					
-				} catch (Exception e) {
-					// TODO Auto-generated catch block
-					log.error("Tcp客户端异常，端口:{}",port);
+				} catch (NullPointerException e) {
+					log.error(e.getMessage());
+				}catch (IllegalStateException ex) {
+					log.error(ex.getMessage());
 				}
+				ChannelFuture future = bootstrap.connect(host, port);
+					future.addListener(connectionListener);
 
 			}
 		});