Springboot项目Netty做服务端并自定义Gson配置类解析数据包
简述
Springboot项目中使用 Netty 作为服务端，接收并处理其他平台发送的 Json数据包，处理拆包、粘包及数据包中时间类型是 long 类型需转成 ***Date***的情况。
项目流程
- 启动项目，开启Netty服务端口11111
- 加载Bean
- 本地开启socket tool，模拟发送惊悚数据包
- Netty解析json包，处理特殊情况，例如 拆包、粘包。
- Gson按照配置文件处理json文件，并转换成JavaBeen
- 入库。
项目结构（下载即可：传送门）
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>cn.angus.demo</groupId>
<artifactId>externalDataConnector</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>1.5.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.netty</groupId>
<artifactId>netty</artifactId>
<version>3.2.10.Final</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.18</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.1</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
<version>1.10.6.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>1.5.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>fluent-hc</artifactId>
<version>4.5.3</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.30.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>cn.angus.demo.Application</mainClass>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
</project>
Listener
package cn.angus.demo.listener;
import cn.angus.demo.consts.Ports;
import cn.angus.demo.handler.VehicleGasSyncHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.timeout.ReadTimeoutHandler;
import io.netty.util.concurrent.DefaultEventExecutorGroup;
import io.netty.util.concurrent.EventExecutorGroup;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import io.netty.handler.codec.json.JsonObjectDecoder;
import javax.annotation.PostConstruct;
@Component
@Slf4j
public class VehicleGasSyncListener {
@Autowired
private VehicleGasSyncHandler vehicleGasSyncHandler;
@PostConstruct
private void startNettyServerAsync(){
new Thread(this::startNettyServer).start();
}
private void startNettyServer(){
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
final EventExecutorGroup businessGroup = new DefaultEventExecutorGroup(10);
try {
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.option(ChannelOption.SO_BACKLOG, 1024)
.childOption(ChannelOption.SO_KEEPALIVE, true)
.childHandler(new ChannelInitializer() {
@Override
protected void initChannel(Channel channel) throws Exception {
// 设置连接超时时间（很重要）
channel.pipeline().addLast("readtime",new ReadTimeoutHandler(60));
// 解决粘包问题
channel.pipeline().addLast(new JsonObjectDecoder());
channel.pipeline().addLast(businessGroup, "executer", vehicleGasSyncHandler);
}
});
ChannelFuture f = b.bind(Ports.VEHICLE_GAS_PORT).sync();
f.channel().closeFuture().sync();
} catch(Exception e) {
log.error(e.getMessage(), e);
} finally {
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
}
Handler
package cn.angus.demo.handler;
import cn.angus.demo.dao.SpotDao;
import cn.angus.demo.domain.Request;
import cn.angus.demo.domain.Spot;
import com.google.gson.Gson;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.nio.charset.Charset;
@Component
@ChannelHandler.Sharable
@Slf4j
public class VehicleGasSyncHandler extends ChannelInboundHandlerAdapter {
private final Gson gson;
@Autowired
private SpotDao spotDao;
private static final String SPOT = "spot";
@Autowired
public VehicleGasSyncHandler(Gson gson) {
this.gson = gson;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg){
ByteBuf m = (ByteBuf) msg;
String rawMsg = m.toString(Charset.forName("utf-8"));
log.info("VehicleGasSyncHandler Receive message: " + rawMsg);
if (rawMsg.length() == 0 || rawMsg.length() -1 != rawMsg.lastIndexOf("}"))
return;
String response = persistAndResponse(rawMsg);
if (response != null) {
ctx.writeAndFlush(Unpooled.wrappedBuffer(response.getBytes()))
.addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE)
.addListener((ChannelFutureListener) channelFuture -> log.info("VehicleGasSyncHandler 成功发送响应{}", response));
m.release();
}
}
private String persistAndResponse(String rawMsg) {
try {
gson.fromJson(rawMsg, Spot.class);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
// 省略返回结果。
return "";
}
}
GsonConfig.java
package cn.angus.demo.config;
import com.google.gson.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Date;
@Configuration
public class GsonConfig {
@Bean
public Gson gson(){
return new GsonBuilder()
.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
// Date 类型适配器
.registerTypeAdapter(Date.class, (JsonDeserializer<Date>) (json, typeOfT, context) -> new Date(json.getAsJsonPrimitive().getAsLong()))
.registerTypeAdapter(Date.class, (JsonSerializer<Date>) (date, type, jsonSerializationContext) -> new JsonPrimitive(date.getTime()))
.create();
}
}
实体类（createTime：将long转成Date）
@Data
@Document(collection = "vehicle_spot")
@JsonIgnoreProperties(ignoreUnknown = true)
public class Spot {
@Id
private String id;
private String area;
private String address;
private String longitude;
private String latitude;
private Double slope;
private Date createTime;
private Boolean inUse;
private Integer fuelTypeId;
private String code;
}
Ports.java
public class Ports {
public static final int VEHICLE_GAS_PORT = 11111;
}
测试用例：
{
"_id" : "297e0587671b749801671b754b020000",
"area" : "京",
"address" : "北京",
"longitude" : "489",
"latitude" : "125",
"slope" : 5.0,
"create_time" :1544756993000,
"fuel_type_id" : 1,
"code" : "testCode"
}
mongo 入库：
项目下载： https://download.csdn.net/download/qq_35974759/10850042
下载后导入到Idea中，配置maven，修改application-dev中的数据库地址改为你的，启动项目，利用SocketTool模拟发送数据包。
有梦为马，游历天涯！
