How to read Query Param in Spring Boot

Create Project with Spring Web Dependency Directory Structure: pom.xml 4.0.0 org.springframework.boot spring-boot-starter-parent 3.4.5 com.example QueryParam 0.0.1-SNAPSHOT QueryParam Demo project for Spring Boot 17 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin GreetingController package com.example.demo.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class GreetingController { @GetMapping("/greet") public String greetUser(@RequestParam String name,@RequestParam(required = false,defaultValue = "User")String title) { return "Hello "+title+" "+name+"!"; } } Hit the Endpoint URL with Query Parameters: http://localhost:8080/greet?name=John&title=Mr Output Hello Mr John! Explanation @RequestParam String name: Marks name as a required query parameter. @RequestParam(required = false, defaultValue = "User") String title: Makes title optional and assigns a default value if not provided.

May 3, 2025 - 14:37

Create Project with Spring Web Dependency
Directory Structure:

pom.xml



    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        3.4.5
         
    
    com.example
    QueryParam
    0.0.1-SNAPSHOT
    QueryParam
    Demo project for Spring Boot
    
    
        
    
    
        
    
    
        
        
        
        
    
    
        17
    
    
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin

GreetingController

package com.example.demo.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class GreetingController {

 @GetMapping("/greet")
 public String greetUser(@RequestParam String name,@RequestParam(required = false,defaultValue = "User")String title) {
  return "Hello "+title+" "+name+"!";
 }

}

Hit the Endpoint
URL with Query Parameters:

http://localhost:8080/greet?name=John&title=Mr

Output

Hello Mr John!

Explanation

@RequestParam String name: Marks name as a required query parameter.

@RequestParam(required = false, defaultValue = "User") String title: Makes title optional and assigns a default value if not provided.