类的说明
public class CustomHandler extends SimpleChannelInboundHandler
1.channelRegistered
channel注册事件
@Override
public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel注册了");
super.channelRegistered(ctx);
}
2.channelUnregistered
channel取消注册事件
@Override
public void channelUnregistered(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel移除了");
super.channelUnregistered(ctx);
}
3.channelActive
channel是否是活跃
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel 活跃");
super.channelActive(ctx);
}
4.channelInactive
channel不活跃
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel 不活跃,断开连接");
super.channelInactive(ctx);
}
5.channelReadComplete
channel读取完毕事件
@Override
public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel 读取完毕");
super.channelReadComplete(ctx);
}
6.userEventTriggered
channel 用户事件触发
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
System.out.println("channel 用户事件触发");
super.userEventTriggered(ctx, evt);
}
7.channelWritabilityChanged
channel 可写更改
@Override
public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel 可写更改");
super.channelWritabilityChanged(ctx);
}
8.exceptionCaught
channel 捕获到异常
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
System.out.println("channel 捕获到异常了,关闭了");
super.exceptionCaught(ctx, cause);
}
9.handlerAdded
channel 助手类(拦截器)的添加
@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel 助手类添加");
super.handlerAdded(ctx);
}
10.handlerRemoved
channel 助手类(拦截器)移除
@Override
public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
System.out.println("channel 助手类移除");
super.handlerRemoved(ctx);
}
11.channelRead0
channel读取数据
@Override
protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg)
throws Exception {
Channel channel = ctx.channel();//获取当前channel
System.out.println(channel.remoteAddress()); //显示客户端的远程地址
//定义发送的数据消息
ByteBuf content = Unpooled.copiedBuffer("Hello cxl",CharsetUtil.UTF_8);
//构建一个http响应
FullHttpResponse response =
new DefaultFullHttpResponse
(HttpVersion.HTTP_1_1,
HttpResponseStatus.OK,
content);
response.headers().set(HttpHeaderNames.CONTENT_TYPE,"text/plain");
response.headers().set(HttpHeaderNames.CONTENT_LENGTH,content.readableBytes());
//把响应刷到客户端
ctx.writeAndFlush(response);
}
12.执行顺序
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作者:小龙哒
来源:CSDN
原文:https://blog.csdn.net/u014131617/article/details/86476522
版权声明:本文为博主原创文章,转载请附上博文链接!