108 lines
3.5 KiB
Java
108 lines
3.5 KiB
Java
package com.sipai.netty;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import java.io.IOException;
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import java.nio.charset.Charset;
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import java.util.Date;
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public class NettyClientHandler extends ChannelInboundHandlerAdapter {
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private NettyClient nettyClient;
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public NettyClientHandler(NettyClient nettyClient) {
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this.nettyClient = nettyClient;
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}
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/**
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* 通道信息读取处理
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* @param ctx
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* @param msg
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*/
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@Override
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public void channelRead(ChannelHandlerContext ctx, Object msg) {
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ByteBuf m = (ByteBuf) msg; // 将消息转化成bytebuf
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try {
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System.out.println("客户端直接打印接收到的消息: " + m.toString(Charset.defaultCharset()));
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long currentTimeMillis = (m.readUnsignedInt() - 2208988800L) * 1000L;
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System.out.println(new Date(currentTimeMillis));
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/**
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* 给服务端回复消息
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*/
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ctx.writeAndFlush("客户端收到! 消息为: " + m.toString(Charset.defaultCharset()));
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} catch (Exception e) {
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System.err.println("读取消息异常: " + e.getMessage());
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} finally {
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m.release();
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}
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}
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/**
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* 连接成功后，自动执行该方法
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* @param ctx
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* @throws Exception
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*/
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@Override
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public void channelActive(ChannelHandlerContext ctx) throws Exception {
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/**
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* 往服务端发送消息
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* 消息格式必须是ByteBuf才行!!!!!
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* 如果是其他格式服务端是接收不到的!!!!
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*/
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System.out.println("首次连接完成!");
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String helo = "你好呀!";
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ByteBuf byteBuf = Unpooled.wrappedBuffer(helo.getBytes());
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ctx.channel().writeAndFlush(byteBuf);
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}
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/**
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* 当连接断开时调用
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* @param ctx
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* @throws Exception
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*/
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@Override
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public void channelInactive(ChannelHandlerContext ctx) throws Exception {
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System.out.println("连接已断开，准备重连...");
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if (nettyClient != null) {
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nettyClient.reconnect();
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}
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}
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/**
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* 异常处理
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* @param ctx
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* @param cause
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*/
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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// 处理远程主机强制关闭连接的异常
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if (cause instanceof IOException) {
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String message = cause.getMessage();
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if (message != null && (message.contains("远程主机强迫关闭了一个现有的连接")
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|| message.contains("Connection reset")
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|| message.contains("远程主机强迫关闭")
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|| message.contains("An existing connection was forcibly closed"))) {
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System.out.println("[" + java.time.LocalDateTime.now() + "] 远程主机已关闭连接，等待重连...");
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ctx.close();
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// 触发重连
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if (nettyClient != null) {
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nettyClient.reconnect();
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}
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return;
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}
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}
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// 其他异常只打印简要信息，不打印完整堆栈
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System.err.println("[" + java.time.LocalDateTime.now() + "] 客户端异常：" + cause.getClass().getSimpleName() + " - " + cause.getMessage());
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ctx.close();
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// 触发重连
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if (nettyClient != null) {
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nettyClient.reconnect();
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}
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}
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}
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