spring field service required a bean of type

I'm working on Spring over Hibernate project an i'm only in the beginning. I'm trying to have a SpringBootApplication which writes to MySql some Location objects. But every time i'm faceing some error. I did everything from my end refer everything still can't resolve it. Please help me out.
This is my error

APPLICATION FAILED TO START
***************************

Description:

Field service in com.project.abhishek.location.controller.LocationController
required a bean of type'com.project.abhishek.location.service.LocationService' that could not be
found.


Action:

Consider defining a bean of type'com.project.abhishek.location.service.LocationService' in your configuration.


Application class

@SpringBootApplication
@ComponentScan(basePackages= "com.project.abhishek.location.controller")
@EntityScan(value ="com.project.abhishek.location.entity")
@EnableJpaRepositories(basePackages = "com.project.abhishek.location.repos")

public class StudentApplication

public static void main(String args)
SpringApplication.run(StudentApplication.class, args);



Controller

@Controller
public class LocationController {

@Autowired
private LocationService service;

@RequestMapping("/saveLoc")
public String saveLocation(@ModelAttribute("location") Location location, ModelMap modelMap)
Location locationSaved = getService().saveLocation(location);

String msg = "Location save with id:" +locationSaved.getId();
modelMap.addAttribute("msg", msg);
return "createLocation";


public LocationService getService()
return service;


public void setService(LocationService service)
this.service = service;



Service Class

@Service
public class LocationServiceImpl implements LocationService

@Autowired
private LocationRepos locationRepos;

@Override
public Location saveLocation(Location location)

return locationRepos.save(location);


@Override
public Location updateLocation(Location location)
return locationRepos.save(location);


@Override
public void deleteLocation(Location location)
locationRepos.delete(location);


@Override
public Location getLocation(int id)
Optional<Location> optional = locationRepos.findById(id);
Location location = optional.get();
return location;


@Override
public List<Location> getAllLocation()
return locationRepos.findAll();


public LocationRepos getLocationRepos()
return locationRepos;


public void setLocationRepos(LocationRepos locationRepos)
this.locationRepos = locationRepos;



Entity

@Entity
public class Location {

@Id
private int id;
private String code;
private String name;
private String type;

public int getId()
return id;


public void setId(int id)
this.id = id;


public String getCode()
return code;


public void setCode(String code)
this.code = code;


public String getName()
return name;


public void setName(String name)
this.name = name;


public String getType()
return type;


public void setType(String type)
this.type = type;


@Override
public String toString()
return "Location [id=" + id + ", code=" + code + ", name=" + name + ", type=" + type + "]";



My packages structure are

com.project.abhishek.location---application classs
com.project.abhishek.location.controller---controller class
com.project.abhishek.location.entity---entity class
com.project.abhishek.location.repos---repository class
com.project.abhishek.location.service---service class


@Service

LocationService

@Component

com.project.abhishek.location.service

@ComponentScan(basePackages= "com.project.abhishek.location.controller")

2 Answers
2

Just include com.project.abhishek.location.service in your @ComponentScan or simply delete @ComponentScan(this way it will scan spring boot application package com.project.abhishek.location and all packages below it).

com.project.abhishek.location.service

@ComponentScan

@ComponentScan

com.project.abhishek.location

By defining @ComponentScan(basePackages= "com.project.abhishek.location.controller") you overrode default component scan path com.project.abhishek.location and told spring to only scan com.project.abhishek.location.controller and packages below it, so it didn't scan com.project.abhishek.location.service.

@ComponentScan(basePackages= "com.project.abhishek.location.controller")

com.project.abhishek.location

com.project.abhishek.location.controller

com.project.abhishek.location.service

Check this https://dzone.com/articles/spring-spring-boot-and-component-scan for more details on defining @ComponentScan. This is similar to your situation:

@ComponentScan

However, let’s say one of the components is defined in package
com.in28minutes.springboot.somethingelse

In this case, you would need to add the new package into Component
Scan.

You have two options:

Define @ComponentScan(“com.in28minutes.springboot”) This would scan
the entire parent tree of com.in28minutes.springboot.

Or define two
specific Component Scans by using an array.
@ComponentScan(“com.in28minutes.springboot.basics.springbootin10steps”,”com.in28minutes.springboot.somethingelse”)

Nothing is required in spring boot, its already there, @SpringBootApplication is sufficient.

@SpringBootApplication

just make below changes and you will be good to go..

Main Application Class:

@SpringBootApplication
public class StudentApplication

public static void main(String args)
SpringApplication.run(StudentApplication.class, args);



Controller Class: @Autowired is sufficient load your dependency, dont need to set, just see change you need to make in @Service notation where you need to name the interface name so dependency name can be locationService when you auto wired.

@Autowired

@Service

locationService

@RestController
public class LocationController {

@Autowired
private LocationService service;

@RequestMapping("/saveLoc")
public String saveLocation(@ModelAttribute("location") Location location, ModelMap modelMap)
Location locationSaved = getService().saveLocation(location);

String msg = "Location save with id:" +locationSaved.getId();
modelMap.addAttribute("msg", msg);
return "createLocation";



Change in Service Class:

@Service("locationService)
public class LocationServiceImpl implements LocationService {


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