Question

Estoy creando crud en Spring. Me funciona correctamente listar y agregar. Cuando hice el borrar ahí vino el problema. He tratado de solucinarlo pero no me han funcionado las soluciones de internet. acá está el código.

el pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>nin5</groupId>
    <artifactId>ninja5</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ninja5</name>
    <description>proyecto rninja5</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

archivo application.properties

server.port=8090
# se indica la base de datos, usuario y password de la bd
spring.datasource.url= jdbc:mysql://localhost:3306/cursobase?useSSL=false&useLegacyDatetimeCode=false&serverTimezone=UTC
spring.datasource.username= root
spring.datasource.password= 

# Indica si debe mostrar el log de las consultas sql ejecutadas
# Bueno a la hora de depurar 
spring.jpa.show-sql=true

# Configurar Hibernate

spring.jpa.properties.hibernate.dialect= org.hibernate.dialect.MySQL5Dialect

Hay 2 controllers
controller

package paqueteninja5.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import paqueteninja5.constant.ViewConstant;
import paqueteninja5.model.ContactClass;
import paqueteninja5.service.ContactService;

@Controller
@RequestMapping("/contacts")
public class ControllerContact {

    @Autowired
    @Qualifier("contactserviceimpl")    
    private ContactService contactservice;

    @GetMapping("/contactform")
    public String redirectcontactform(Model modelo) {
                modelo.addAttribute("contactModel", new ContactClass());

        return ViewConstant.CONTACTFORM;
    }

    @GetMapping("/cancel")
    public String cancel() {

        //return ViewConstant.CONTACTS;
        return "redirect:/contacts/showcontacts";
    }

    @PostMapping("/addcontact")
    public String addcontact(@ModelAttribute (name="contactModel") ContactClass contactModel, Model model ) {
        //contactmodel.addAttribute("contactModel", "");

        if (contactservice.addcontact(contactModel)!=null) {

            model.addAttribute("resultado", 1);
        }

        else {model.addAttribute("resultado", 0);}
        //return ViewConstant.CONTACTS;
        return "redirect:/contacts/showcontacts";
    }

    @GetMapping("/showcontacts")
    public ModelAndView showcontacts() {

        ModelAndView mav=new ModelAndView(ViewConstant.CONTACTS);
        mav.addObject("contacts", contactservice.listallcontacts());
        return mav;
    }

    @GetMapping("/removecontacts")
    public ModelAndView removecontacts(@RequestParam(name="id", required=true) int id) {

    //  contactservice.removecontact(id);
        return showcontacts();
    }

}

package paqueteninja5.controller;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

import paqueteninja5.constant.ViewConstant;
import paqueteninja5.model.UserCredential;

@Controller
public class ControllerLogin {

    private static final Log LOGGER=LogFactory.getLog(ControllerLogin.class);
    @GetMapping("/")
    public String redirigir() {

        return "redirect:/login";
    }

    @GetMapping("/login")
    public String showLogin(Model model, @RequestParam(name="error", required=false)String errorp,
    @RequestParam(name="logout", required=false)String logoutp)

    {
        LOGGER.info("Metodo showLogin(() " + "parametro errorp --->" + errorp + "parametro logoutp-->" + logoutp);

        model.addAttribute("objetologin", new UserCredential());
        model.addAttribute("error", errorp);
        model.addAttribute("logout", logoutp);
        return ViewConstant.LOGIN;

    }

    @PostMapping("/procesar")
    public String procesarLogin(@ModelAttribute(name="usuariocredencial") UserCredential usercredential, Model model) {

        LOGGER.info("METODO--> PROCESARLOGIN()"+ "PARAMETRO USERCREDENTIAL" + usercredential.toString());

        if(usercredential.getUsername().equals("mauricio") && usercredential.getPassword().equals("lara")) {

            model.addAttribute("usuario", usercredential.getUsername());
            LOGGER.info("returning vista contacts");
            //return ViewConstant.CONTACTS;
            return "redirect:/contacts/showcontacts";
        }

        LOGGER.info("redirecting to /login con parametro error");
        return "redirect:/login?error";

    }

}

service

package paqueteninja5.service;

import java.util.List;

import paqueteninja5.entity.Contact;
import paqueteninja5.model.ContactClass;

public interface ContactService {

    public abstract ContactClass addcontact(ContactClass contactmodel);
    public abstract List<ContactClass> listallcontacts();
    public abstract Contact findcontactbyid(int id);

    public abstract void removecontact(int id);

}

clase que implementa service

package paqueteninja5.service.serviceimpl;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import paqueteninja5.component.ComponentConverter;
import paqueteninja5.entity.Contact;
import paqueteninja5.model.ContactClass;
import paqueteninja5.repository.ContactRepository;
import paqueteninja5.service.ContactService;

@Service("contactserviceimpl")
public class ContactServiceImpl implements ContactService{

    @Autowired
    @Qualifier("contactrepository")
    private ContactRepository contactrepository;

    @Autowired 
    @Qualifier("contactconverter")
    private ComponentConverter contactconverter;

    @Override
    public ContactClass addcontact(ContactClass contactmodel) {
        Contact contact = contactrepository.save(contactconverter.modeltoentity(contactmodel));
        return contactconverter.entitytomodel(contact);
    }

    @Override
    public List<ContactClass> listallcontacts() {
    List<Contact> contacts=contactrepository.findAll();
    List<ContactClass> contactsmodel=new ArrayList<ContactClass>();
    contactrepository.findAll();
    for(Contact contact: contacts) {

        contactsmodel.add(contactconverter.entitytomodel(contact));
    }
        return contactsmodel;
    }

    @Override
    public Contact findcontactbyid(int id) {
        return contactrepository.findbyid(id);

    }

    @Override
    public void removecontact(int id) {
        Contact contact = findcontactbyid(id);
        if(contact!=null) {
            contactrepository.delete(contact);
        }

    }

}

repository

package paqueteninja5.repository;

import java.io.Serializable;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import paqueteninja5.entity.Contact;

@Repository("contactrepository")

public interface ContactRepository extends JpaRepository<Contact, Serializable>{

    public abstract Contact findbyid(int id);

    //public abstract Contact findbyid(int id);

}

modelo 2 clases

package paqueteninja5.model;

public class ContactClass {

    private int id;
    private String firstname;
    private String lastname;
    private String telephone;
    private String city;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getFirstname() {
        return firstname;
    }
    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }
    public String getLastname() {
        return lastname;
    }
    public void setLastname(String lastname) {
        this.lastname = lastname;
    }
    public String getTelephone() {
        return telephone;
    }
    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    public ContactClass(int id, String firstname, String lastname, String telephone, String city) {
        super();
        this.id = id;
        this.firstname = firstname;
        this.lastname = lastname;
        this.telephone = telephone;
        this.city = city;
    }
    public ContactClass() {

    }

}

el error

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'contactserviceimpl': Unsatisfied dependency expressed through field 'contactrepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactrepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract paqueteninja5.entity.Contact paqueteninja5.repository.ContactRepository.findbyid(int)! No property findbyid found for type Contact!