I had exact same error, I was not giving base package. Giving correct base package,ressolved it.
package com.ymc.backend.ymcbe;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan(basePackages="com.ymc.backend")
public class YmcbeApplication {
public static void main(String[] args) {
SpringApplication.run(YmcbeApplication.class, args);
}
}
Note: not including .controller @ComponentScan(basePackages="com.ymc.backend.controller") because i have many other component classes which my project does not scan if i just give .controller
Here is my controller sample:
package com.ymc.backend.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@CrossOrigin
@RequestMapping(value = "/user")
public class UserController {
@PostMapping("/sendOTP")
public String sendOTP() {
return "OTP sent";
};
}