added properties reader, and a few other bits

build.gradle

@@ -17,6 +17,7 @@ test {
 }
 
 dependencies {
+    implementation group: 'org.hibernate', name: 'hibernate-validator', version: '6.1.6.Final'
     implementation group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.4.0'
     implementation group: 'org.springframework.boot', name: 'spring-boot-starter-test', version: '2.4.0'
     implementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.7.0'

src/main/java/com/gmgauthier/springboot/DemoProperties.java

@@ -0,0 +1,52 @@
+package com.gmgauthier.springboot;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotEmpty;
+import java.util.List;
+
+@Configuration
+@ConfigurationProperties("demo")
+public class DemoProperties {
+
+    @NotEmpty
+    private String resourceUrl;
+
+    private List<Integer> resourcePort;
+
+    @Max(5)
+    @Min(0)
+    private Integer resourceCount;
+
+    @Override
+    public String toString() {
+
+        return "\n" + "resourceUrl: "+ this.resourceUrl+"\n"
+                + "resourcePort: "+this.resourcePort+"\n"
+                + "resourceCount: "+this.resourceCount+"\n";
+    }
+
+    public String getResourceUrl() {
+        return resourceUrl;
+    }
+    public void setResourceUrl(String resourceUrl) {
+        this.resourceUrl = resourceUrl;
+    }
+    public List<Integer> getResourcePort() {
+        return resourcePort;
+    }
+    public void setResourcePort(List<Integer> resourcePort) {
+        this.resourcePort = resourcePort;
+    }
+
+    public Integer getResourceCount() {
+        return resourceCount;
+    }
+
+    public void setResourceCount(Integer resourceCount) {
+        this.resourceCount = resourceCount;
+    }
+}

src/main/java/com/gmgauthier/springboot/HelloWorldController.java

@@ -5,6 +5,9 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
 @RestController
 @EnableAutoConfiguration
 public class HelloWorldController {
@@ -12,6 +15,15 @@ public class HelloWorldController {
     @RequestMapping("/")
     @ResponseBody
     String hello() {
-        return "Hello World! Spring boot is so simple.";
+        return "<h1>Hello World!</h1> \n <h2>Spring boot is so simple.</h2>";
+    }
+
+    @RequestMapping("/date")
+    @ResponseBody
+    String time() {
+        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd 'at' HH:mm:ss z");
+        Date date = new Date(System.currentTimeMillis());
+        String strDate = formatter.format(date);
+        return "<p><b>The Current Date is:" + strDate + "</b></p>";
     }
 }

src/main/java/com/gmgauthier/springboot/SpringBootWebApplication.java

@@ -1,12 +1,28 @@
 package com.gmgauthier.springboot;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+import javax.annotation.PostConstruct;
+
 @SpringBootApplication
 public class SpringBootWebApplication {
 
+    private static Logger logger = LoggerFactory.getLogger(SpringBootWebApplication.class);
+
+    @Autowired
+    private DemoProperties demoProperties;
+
     public static void main(String[] args) throws Exception {
         SpringApplication.run(SpringBootWebApplication.class, args);
     }
+
+    @PostConstruct
+    public void init() {
+
+        logger.info(demoProperties.toString());
+    }
 }

src/main/resources/application.properties

@@ -0,0 +1,10 @@
+spring.main.banner-mode=off
+
+server.port=800
+logging.level.org.springframework.web=DEBUG
+logging.level.org.hibernate=ERROR
+
+demo.resource-url=http://duckduckgo.com
+demo.resourcePort[0]=80
+demo.resourcePort[1]=443
+demo.resourceCount=10