springboot2 写一个tcp服务端接受数据并按照212-2017在线污染源监测协议解析
时间: 2023-05-14 16:04:26 浏览: 88
好的,以下是一个简单的 Spring Boot 2 TCP 服务端代码,可以接收数据并按照 212-2017 在线污染源监测协议进行解析:
```java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure
相关问题
springboot2 写一个tcp服务端
可以使用Netty框架来实现一个TCP服务端,以下是一个简单的示例代码:
1. 首先,在pom.xml文件中添加以下依赖:
```
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.42.Final</version>
</dependency>
```
2. 创建一个Server类,实现TCP服务端的逻辑:
```
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
public class Server {
private int port;
public Server(int port) {
this.port = port;
}
public void run() throws Exception {
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception {
ch.pipeline().addLast(new ServerHandler());
}
})
.option(ChannelOption.SO_BACKLOG, 128)
.childOption(ChannelOption.SO_KEEPALIVE, true);
ChannelFuture f = b.bind(port).sync();
f.channel().closeFuture().sync();
} finally {
workerGroup.shutdownGracefully();
bossGroup.shutdownGracefully();
}
}
public static void main(String[] args) throws Exception {
int port = 8080;
new Server(port).run();
}
}
```
3. 创建一个ServerHandler类,处理客户端发送的消息:
```
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
public class ServerHandler extends ChannelInboundHandlerAdapter {
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
byte[] req = new byte[buf.readableBytes()];
buf.readBytes(req);
String message = new String(req, "UTF-8");
System.out.println("Received message: " + message);
// TODO: 处理客户端发送的消息
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
cause.printStackTrace();
ctx.close();
}
}
```
4. 在main方法中启动服务端:
```
public static void main(String[] args) throws Exception {
int port = 8080;
new Server(port).run();
}
```
以上就是一个简单的TCP服务端的实现。
springboot netty 连接多个tcp服务端
在Spring Boot中使用Netty连接多个TCP服务端可以通过以下步骤实现:
1. 首先,确保你已经在Spring Boot项目中引入了Netty的依赖。可以在pom.xml文件中添加以下依赖:
```xml
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.65.Final</version>
</dependency>
```
2. 创建一个Netty客户端的处理器类,用于处理接收到的消息。可以继承`SimpleChannelInboundHandler`类,并重写`channelRead0`方法来处理接收到的消息。
```java
public class NettyClientHandler extends SimpleChannelInboundHandler<String> {
@Override
protected void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception {
// 处理接收到的消息
System.out.println("Received message: " + msg);
}
}
```
3. 创建一个Netty客户端的启动类,用于配置和启动Netty客户端。
```java
@Configuration
public class NettyClientConfig {
@Value("${netty.server.host}")
private String serverHost;
@Value("${netty.server.port}")
private int serverPort;
@Bean
public EventLoopGroup eventLoopGroup() {
return new NioEventLoopGroup();
}
@Bean
public Bootstrap bootstrap(EventLoopGroup eventLoopGroup, NettyClientHandler nettyClientHandler) {
Bootstrap bootstrap = new Bootstrap();
bootstrap.group(eventLoopGroup)
.channel(NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast(new StringEncoder());
pipeline.addLast(new StringDecoder());
pipeline.addLast(nettyClientHandler);
}
});
return bootstrap;
}
@Bean
public ChannelFuture channelFuture(Bootstrap bootstrap) throws InterruptedException {
return bootstrap.connect(serverHost, serverPort).sync();
}
}
```
4. 在配置文件中配置要连接的多个TCP服务端的主机和端口。
```properties
# application.properties
netty.server.host=127.0.0.1
netty.server.port=8080
```
5. 在需要使用Netty客户端的地方注入`ChannelFuture`对象,并使用它来发送消息给服务端。
```java
@Service
public class NettyClientService {
@Autowired
private ChannelFuture channelFuture;
public void sendMessage(String message) {
if (channelFuture.channel().isActive()) {
channelFuture.channel().writeAndFlush(message);
} else {
// 连接未建立或已断开,处理相应逻辑
}
}
}
```
这样,你就可以在Spring Boot项目中使用Netty连接多个TCP服务端了。