Spring boot controller not getting scanned error 404 not found - spring-boot

Question

I am trying to create restful api but my controller is not working and I'm getting the error shown below:
{
"timestamp": "2020-06-11T15:28:18.103+00:00",
"status": 404,
"error": "Not Found",
"message": "",
"path": "/path/findCarsAfterYear/2020"
}
Please help me to resolve this.
Entity Class
package com.example.demo.data;
import javax.persistence.*;
#Entity
public class Car {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column
private long id;
#Column
private String model;
#Column
private Integer year;
// standard getters and setters
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public Integer getYear() {
return year;
}
public void setYear(Integer year) {
this.year = year;
}
}
Repository Class
package com.example.demo.Repository;
import com.example.demo.data.Car;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.jpa.repository.query.Procedure;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import java.util.List;
#Repository
public interface CarRepository extends JpaRepository<Car, Integer> {
#Query("Select wds from Car wds where year=?1 ")
List<Car> findCarsAfterYear(Integer year);
}
Service class
package com.example.demo.service;
import com.example.demo.Repository.CarRepository;
import com.example.demo.data.Car;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
#Service
public class CarService {
#Autowired
CarRepository carRepository;
public List<Car> findCarsAfterYear(Integer id) {
return carRepository.findCarsAfterYear(id);
}
}
Controller class
package com.example.demo.Controller;
import com.example.demo.data.Car;
import com.example.demo.service.CarService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
#Controller
#RequestMapping(path="/test")
public class CarController {
#Autowired(required=true)
private CarService carService;
#GetMapping(value="/findCarsAfterYear/{id}")
public List<Car> findCarsAfterYear(Integer id) {
return carService.findCarsAfterYear(id);
}
}
Application Class
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
#Configuration
#SpringBootApplication(exclude = {SecurityAutoConfiguration.class})
#EnableJpaRepositories("com.example.demo.Repository")
#EntityScan("com.example.demo.data")
#ComponentScan(basePackages="com.example.demo.service,com.example.demo.Controller")
#EnableCaching
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

Answer 1

In you want to use #Controller then you have to provide #ResponseBody explicitly.
#Controller
#RequestMapping(path="/test")
public class CarController {
#Autowired(required=true)
private CarService carService;
#GetMapping(value="/findCarsAfterYear/{id}")
#ResponseBody
public List<Car> findCarsAfterYear(Integer id) {
return carService.findCarsAfterYear(id);
}
}
But in case #RestController, which is combination of #Controllerand #ResponseBody
#RestController
#RequestMapping(path="/test")
public class CarController {
#Autowired(required=true)
private CarService carService;
#GetMapping(value="/findCarsAfterYear/{id}")
public List<Car> findCarsAfterYear(Integer id) {
return carService.findCarsAfterYear(id);
}
}
I hope this will be helpful.