完善FirstController控制器实现

parkingmanagement-SpringMVCProject/src/com/ssm/controller/FirstController.java

@@ -1,5 +1,15 @@
 package com.ssm.controller;
 
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
 public class FirstController {
 
+    @RequestMapping("/first")
+    public String first(Model model) {
+        model.addAttribute("message", "Hello SpringMVC!");
+        return "showFirst";
+    }
 }