BAEL-16792 Slice 3 | The top 100 articles should have their own package in the module (#7596)

spring-mvc-simple/src/main/java/com/baeldung/spring/requestparam/RequestParamController.java

@@ -0,0 +1,79 @@
+package com.baeldung.spring.requestparam;
+
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+
+@Controller
+public class RequestParamController {
+
+    @GetMapping("/api/foos")
+    @ResponseBody
+    public String getFoos(@RequestParam String id){
+        return "ID: " + id;
+    }
+    
+    @PostMapping("/api/foos")
+    @ResponseBody
+    public String addFoo(@RequestParam(name = "id") String fooId, @RequestParam String name){ 
+        return "ID: " + fooId;
+    }
+    
+    @GetMapping("/api/foos2")
+    @ResponseBody
+    public String getFoos2(@RequestParam(required = false) String id){ 
+        return "ID: " + id;
+    }
+    
+    @GetMapping("/api/foos3")
+    @ResponseBody
+    public String getFoos3(@RequestParam(defaultValue = "test") String id){
+        return "ID: " + id;
+    }
+    
+    @PostMapping("/api/foos1")
+    @ResponseBody
+    public String updateFoos(@RequestParam Map<String,String> allParams){
+        return "Parameters are " + allParams.entrySet();
+    }
+    
+    @GetMapping("/api/foos4")
+    @ResponseBody
+    public String getFoos4(@RequestParam List<String> id){
+        return "IDs are " + id;
+    }
+    
+    @GetMapping("/foos/{id}")
+    @ResponseBody
+    public String getFooById(@PathVariable String id){
+        return "ID: " + id;
+    }
+    
+    @GetMapping("/foos")
+    @ResponseBody
+    public String getFooByIdUsingQueryParam(@RequestParam String id){
+        return "ID: " + id;
+    }
+    
+    @GetMapping({"/myfoos/optional", "/myfoos/optional/{id}"})
+    @ResponseBody
+    public String getFooByOptionalId(@PathVariable(required = false) String id){
+        return "ID: " + id;
+    }
+    
+    @GetMapping("/myfoos/optionalParam")
+    @ResponseBody
+    public String getFooByOptionalIdUsingQueryParam(@RequestParam(required = false) String id){
+        return "ID: " + id;
+    }
+    
+    
+    
+}