added a simple spring project

helps people starting with spring

Java/Spring/covidTracker/README.md

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+# Simple COVID-19 Tracker
+#### Simple project made using Spring to track the total and new cases of COVID around the world.
+
+This project works with the help of a CSV data extracted from https://github.com/CSSEGISandData/COVID-19.
+
+<img src="https://i.imgur.com/eLX4mTP.png">
+
+## How to run the program:
+
+> Clone the repository
+
+> Use an IDE that you prefer, I use IntelliJ
+
+> Run CovidTrackerApplication.java
+
+> Enter your favorite browser, and access http://localhost:8080
+
+
+#### This tracker refreshes for new cases every hour.

Java/Spring/covidTracker/src/main/java/com/github/covidtracker/CovidTrackerApplication.java

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+package com.github.covidtracker;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@SpringBootApplication
+@EnableScheduling
+public class CovidTrackerApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(CovidTrackerApplication.class, args);
+	}
+}

Java/Spring/covidTracker/src/main/java/com/github/covidtracker/controllers/HomeController.java

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+package com.github.covidtracker.controllers;
+
+import com.github.covidtracker.models.LocationStats;
+import com.github.covidtracker.services.CovidDataService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import java.util.List;
+
+@Controller
+public class HomeController {
+
+    @Autowired
+    CovidDataService covidDataService;
+
+    @GetMapping("/")
+    public String home(Model model) {
+        List<LocationStats> allStats = covidDataService.getAllStats();
+        int totalReportedCases = allStats.stream().mapToInt(LocationStats::getLatestTotalCases).sum();
+        int dailyCases = allStats.stream().mapToInt(LocationStats::getNewDailyCases).sum();
+        int newCases = totalReportedCases - dailyCases;
+        model.addAttribute("locationStats", allStats);
+        model.addAttribute("totalReportedCases", totalReportedCases);
+        model.addAttribute("newCases", newCases);
+        return "home";
+    }
+
+}

Java/Spring/covidTracker/src/main/java/com/github/covidtracker/models/LocationStats.java

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+package com.github.covidtracker.models;
+
+public class LocationStats {
+
+    private String state;
+    private String country;
+    private int latestTotalCases;
+    private int newDailyCases;
+
+    public String getState() {
+        return state;
+    }
+
+    public void setState(String state) {
+        this.state = state;
+    }
+
+    public String getCountry() {
+        return country;
+    }
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public int getLatestTotalCases() {
+        return latestTotalCases;
+    }
+
+    public void setLatestTotalCases(int latestTotalCases) {
+        this.latestTotalCases = latestTotalCases;
+    }
+
+    public int getNewDailyCases() {
+        return newDailyCases;
+    }
+
+    public void setNewDailyCases(int newDailyCases) {
+        this.newDailyCases = newDailyCases;
+    }
+
+    public int dailyNew() {
+        return latestTotalCases - newDailyCases;
+    }
+    @Override
+    public String toString() {
+        return "LocationStats{" +
+                "state='" + state + '\'' +
+                ", country='" + country + '\'' +
+                ", latestTotalCases=" + latestTotalCases +
+                ", newDailyCases=" + dailyNew() +
+                '}';
+    }
+}

Java/Spring/covidTracker/src/main/java/com/github/covidtracker/services/CovidDataService.java

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+package com.github.covidtracker.services;
+import com.github.covidtracker.models.LocationStats;
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVRecord;
+import org.apache.tomcat.util.http.parser.HttpParser;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.PostConstruct;
+import java.io.IOException;
+import java.io.StringReader;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class CovidDataService {
+
+    private static String VIRUS_DATA_URL = "https://raw.githubusercontent.com/CSSEGISandData/COVID-19/master/csse_covid_19_data/csse_covid_19_time_series/time_series_covid19_confirmed_global.csv";
+
+    private List<LocationStats> allStats = new ArrayList<>();
+
+    public List<LocationStats> getAllStats() {
+        return allStats;
+    }
+
+    @PostConstruct
+    @Scheduled(cron = "* * 1 * * *")
+    public void fetchData() throws IOException, InterruptedException {
+        List<LocationStats> newStats = new ArrayList<>();
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(VIRUS_DATA_URL))
+                .build();
+        HttpResponse<String> httpResponse = client.send(request, HttpResponse.BodyHandlers.ofString());
+        StringReader csvBodyReader = new StringReader(httpResponse.body());
+        Iterable<CSVRecord> records = CSVFormat.DEFAULT.withFirstRecordAsHeader().parse(csvBodyReader);
+        for (CSVRecord record : records) {
+            LocationStats locationStat = new LocationStats();
+            locationStat.setState(record.get("Province/State"));
+            locationStat.setCountry(record.get("Country/Region"));
+            locationStat.setLatestTotalCases(Integer.parseInt(record.get(record.size() - 1)));
+            locationStat.setNewDailyCases(Integer.parseInt(record.get(record.size() - 2)));
+            newStats.add(locationStat);
+        }
+        this.allStats = newStats;
+    }
+
+}

Java/Spring/covidTracker/src/main/resources/application.properties

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+

Java/Spring/covidTracker/src/main/resources/templates/home.html

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+<!DOCTYPE html>
+
+<html xmlns:th="http://www.thymeleaf.org" lang="en-US">
+
+<head>
+    <title>COVID Tracker</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <link rel="stylesheet" type="text/css" media="all"
+          href="../../css/gtvg.css" th:href="@{/css/gtvg.css}" />
+    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KyZXEAg3QhqLMpG8r+8fhAXLRk2vvoC2f3B09zVXn8CA5QIVfZOJ3BCsw2P0p/We" crossorigin="anonymous">
+</head>
+
+<body>
+
+<div class="container">
+    <hr class="my-4">
+<h1>Simple COVID-19 Tracker</h1>
+    <hr class="my-4">
+<p class="lead">This application shows current number of cases from all over Za Warudo!</p>
+    <p>Made with Spring <img alt="Spring icon." src="https://spring.io/images/projects/spring-edf462fec682b9d48cf628eaf9e19521.svg" width="23" height="23"></p>
+
+<div class="p-5 mb-4 bg-light rounded-3">
+    <p class="lead">Total cases reported as of today:</p>
+    <h1 class="display-4" th:text="${totalReportedCases}"></h1>
+    <hr class="my-4">
+    <p>
+        <span>New cases reported since previous day:</span><br>
+        <span th:text="${newCases}"></span>
+    </p>
+</div>
+
+<div class="p-5 mb-4">
+<table class="table table-bordered">
+    <tr>
+        <th>Country/Region</th>
+        <th>Province/State</th>
+        <th>Total Cases Reported</th>
+        <th>Daily New Cases</th>
+    </tr>
+    <tr th:each="locationStat : ${locationStats}">
+        <td th:text="${locationStat.country}">N/A</td>
+        <td th:text="${locationStat.state}">N/A</td>
+        <td th:text="${locationStat.latestTotalCases}">0</td>
+        <td th:text="${locationStat.dailyNew()}">0</td>
+    </tr>
+</table>
+</div>
+</div>
+</body>
+
+</html>

Java/Spring/covidTracker/src/test/java/com/github/covidtracker/CovidTrackerApplicationTests.java

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+package com.github.covidtracker;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class CovidTrackerApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}