基于SpringBoot+定时任务实现地图上绘制车辆实时运动轨迹图

1. 项目结构

2. Maven依赖配置 (pom.xml)

3. 实现后端服务

4. 配置文件 (application.properties)

5. 启动项目

6. 访问页面

实现基于北斗卫星的车辆定位和轨迹图的Maven工程（使用模拟数据），我们将使用以下技术：

Spring Boot：作为后端框架，用来提供数据接口。
Thymeleaf：作为前端模板引擎，呈现网页。
Leaflet.js：一个开源的JavaScript库，用于显示交互式地图。
Simulated Data：使用随机生成的模拟GPS数据来模拟北斗卫星车辆位置。
WebSocket：用于实现实时数据推送，确保地图位置每秒更新。

1. 项目结构

创建一个Maven项目，基本结构如下：

项目结构图：

2. Maven依赖配置 (pom.xml)

首先在pom.xml中添加必要的依赖，确保使用Spring Boot、WebSocket和Thymeleaf：

<dependencies>
    <!-- Spring Boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- Thymeleaf for rendering HTML -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>

    <!-- WebSocket for real-time communication -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>

    <!-- Lombok (Optional, for cleaner code) -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>provided</scope>
    </dependency>
</dependencies>

3. 实现后端服务

java">package com.example.beidou;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@EnableScheduling  // 启用定时任务
public class BeidouApplication {
    public static void main(String[] args) {
        SpringApplication.run(BeidouApplication.class, args);
    }
}

效果图：

Controller：

java">package com.example.beidou.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;
import javax.annotation.PostConstruct;

@RestController
public class VehicleController {

    @Autowired
    private SimpMessagingTemplate messagingTemplate;

    private Map<String, Map<String, Double>> vehiclePositions = new HashMap<String, Map<String, Double>>() {{
        put("Vehicle 1", new HashMap<String, Double>() {{
            put("latitude", 39.9042);//北京
            put("longitude", 116.4074);
        }});
        put("Vehicle 2", new HashMap<String, Double>() {{
            put("latitude", 31.2304);//上海
            put("longitude", 121.4737);
        }});
        put("Vehicle 3", new HashMap<String, Double>() {{
            put("latitude", 22.3964);// 香港
            put("longitude", 114.1095);
        }});
        put("Vehicle 4", new HashMap<String, Double>() {{
            put("latitude", 30.5728);//成都
            put("longitude", 104.0668);
        }});
        put("Vehicle 5", new HashMap<String, Double>() {{
            put("latitude", 34.3416);// 西安
            put("longitude", 108.9398);
        }});
    }};

    private Map<String, Map<String, Double>> vehicleTargets = new HashMap<String, Map<String, Double>>() {{

        put("Vehicle 1", new HashMap<String, Double>() {{
            put("latitude", 31.2304);//上海
            put("longitude", 121.4737);
        }});
        put("Vehicle 2", new HashMap<String, Double>() {{
            put("latitude", 39.9042);//北京
            put("longitude", 116.4074);
        }});
        put("Vehicle 3", new HashMap<String, Double>() {{
            put("latitude", 34.3416);// 西安
            put("longitude", 108.9398);
        }});
        put("Vehicle 4", new HashMap<String, Double>() {{
            put("latitude", 22.3964);// 香港
            put("longitude", 114.1095);
        }});
        put("Vehicle 5", new HashMap<String, Double>() {{
            put("latitude", 30.5728);//成都
            put("longitude", 104.0668);
        }});

    }};

    // 服务器启动时自动启动模拟
    @PostConstruct
    public void startSimulation() {
        System.out.println("Starting vehicle simulation...");
    }


    // 模拟车辆移动轨迹
    @Scheduled(fixedRate = 1000)
    private void sendVehicleUpdates() {
        Map<String, Map<String, Double>> updatedPositions = new HashMap<>();

        for (Map.Entry<String, Map<String, Double>> entry : vehiclePositions.entrySet()) {
            String vehicleId = entry.getKey();
            Map<String, Double> position = entry.getValue();
            Map<String, Double> target = vehicleTargets.get(vehicleId);

            // 按一定速度向目标移动
            double latDiff = target.get("latitude") - position.get("latitude");
            double lonDiff = target.get("longitude") - position.get("longitude");

            // 每次移动经纬度的 1/100
            double newLatitude = position.get("latitude") + latDiff * 0.02;
            double newLongitude = position.get("longitude") + lonDiff * 0.02;

            position.put("latitude", newLatitude);
            position.put("longitude", newLongitude);

            updatedPositions.put(vehicleId, new HashMap<>(position));
        }

        messagingTemplate.convertAndSend("/topic/vehicleLocation", updatedPositions);
    }
}

WebSocketConfig ：

java">package com.example.beidou.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");  // 使用 "/topic" 作为消息前缀
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/vehicle-location").setAllowedOriginPatterns("*").withSockJS();
    }
}