Начало работы.

spring_online_calculator/src/main/java/com/example/spring_online_calculator/SpringOnlineCalculatorApplication.java

@@ -2,12 +2,19 @@ package com.example.spring_online_calculator;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 
 @SpringBootApplication
 public class SpringOnlineCalculatorApplication {
 
-	public static void main(String[] args) {
+	public static void main(String[] args)
+	{
 		SpringApplication.run(SpringOnlineCalculatorApplication.class, args);
 	}
 
+	@GetMapping("/String")
+	public String PrintName(@RequestParam(value = "str", defaultValue = "Иван") String str) {
+		return String.format("Вы ввели %s!", str);
+	}
 }