#35 springboot: environment variables - spring env

springboot/external/src/main/java/hello/EnvironmentCheck.java

@@ -0,0 +1,25 @@
+package hello;
+
+import jakarta.annotation.PostConstruct;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class EnvironmentCheck {
+    
+    private final Environment env;
+    
+    @PostConstruct
+    public void init() {
+        String url = env.getProperty("url");
+        String username = env.getProperty("username");
+        String password = env.getProperty("password");
+        log.info("env url={}", url);
+        log.info("env username={}", username);
+        log.info("env password={}", password);
+    }
+}