Completed

src/main/java/io/zipcoder/crudapp/People.java

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+package io.zipcoder.crudapp;
+
+import javax.persistence.*;
+import java.util.List;
+
+@Entity
+public class People {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    @OneToMany
+    private List<Person> personList;
+
+    public People() {
+    }
+
+    public People(Long id, List<Person> personList) {
+        this.id = id;
+        this.personList = personList;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public List<Person> getPersonList() {
+        return personList;
+    }
+
+    public void setPersonList(List<Person> personList) {
+        this.personList = personList;
+    }
+}

src/main/java/io/zipcoder/crudapp/PeopleRepository.java

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+package io.zipcoder.crudapp;
+
+import org.springframework.data.repository.CrudRepository;
+
+public interface PeopleRepository extends CrudRepository {
+}

src/main/java/io/zipcoder/crudapp/Person.java

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+package io.zipcoder.crudapp;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+
+import javax.persistence.*;
+
+@Entity
+public class Person {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String firstName;
+    private String lastName;
+
+
+    @ManyToOne
+    @JsonIgnore
+    private People people;
+
+    public Person() {
+    }
+
+    public Person(Long id, String firstName, String lastName) {
+        this.id = id;
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long 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;
+    }
+}

src/main/java/io/zipcoder/crudapp/PersonConfig.java

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+package io.zipcoder.crudapp;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+
+import javax.annotation.PostConstruct;
+
+@Configuration
+public class PersonConfig {
+    @Autowired
+    private PersonService service;
+
+    @PostConstruct
+    public void setup() {
+        service.create(new Person());
+        service.create(new Person());
+        service.create(new Person());
+    }
+}
+// Cardinality - OneToOne ManyToMany OneToMany
+

src/main/java/io/zipcoder/crudapp/PersonController.java

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+package io.zipcoder.crudapp;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+import java.util.List;
+
+@Controller
+@RequestMapping(value = "/person-controller")
+public class PersonController {
+    @Autowired
+    private PersonService service;
+
+    @RequestMapping(method = RequestMethod.POST, value = "/create")
+    public ResponseEntity<Person> create(@RequestBody Person person) {
+        return new ResponseEntity<>(service.create(person), HttpStatus.CREATED);
+    }
+
+    @RequestMapping(method = RequestMethod.GET, value = "/read/{id}")
+    public ResponseEntity<Person> read(@PathVariable Long id) {
+        if(service.read(id) != null){
+        return new ResponseEntity<>(service.read(id), HttpStatus.OK);
+        }
+        return new ResponseEntity<>(service.read(id),HttpStatus.NOT_FOUND);
+    }
+
+    @RequestMapping(method = RequestMethod.GET, value = "/readAll")
+    public ResponseEntity<List<Person>> readAll() {
+        return new ResponseEntity<>(service.readAll(), HttpStatus.OK);
+    }
+
+    @RequestMapping(method = RequestMethod.PUT, value = "/update/{id}")
+    public ResponseEntity<Person> update(@PathVariable Long id,@RequestBody Person newPersonData) {
+        if(service.read(id) != null) {
+            return new ResponseEntity<>(service.update(id, newPersonData), HttpStatus.OK);
+        }
+       return new ResponseEntity<>(service.create(newPersonData), HttpStatus.CREATED);
+    }
+
+    @RequestMapping(method = RequestMethod.DELETE, value = "/delete/{id}")
+    public ResponseEntity<Person> delete(@PathVariable Long id) {
+        return new ResponseEntity<>(service.delete(id), HttpStatus.NO_CONTENT);
+    }
+
+}

src/main/java/io/zipcoder/crudapp/PersonRepository.java

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+package io.zipcoder.crudapp;
+
+import org.springframework.data.repository.CrudRepository;
+
+public interface PersonRepository extends CrudRepository<Person, Long> {
+}

src/main/java/io/zipcoder/crudapp/PersonService.java

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+package io.zipcoder.crudapp;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class PersonService {
+    @Autowired
+    private PersonRepository repository;
+
+
+    public Person create(Person person) {
+        return repository.save(person);
+    }
+
+    public Person read(Long id) {
+        return repository.findOne(id);
+    }
+
+    public List<Person> readAll() {
+        Iterable<Person> personIterable = repository.findAll();
+        List<Person> result = new ArrayList<>();
+        personIterable.forEach(result::add);
+        return result;
+    }
+
+    public Person update(Long id, Person newPersonData) {
+        Person personInDb = read(id);
+        personInDb.setFirstName(newPersonData.getFirstName());
+        personInDb.setLastName(newPersonData.getLastName());
+        personInDb = repository.save(personInDb);
+        return personInDb;
+    }
+
+    public Person delete(Long id) {
+        Person personInDb = read(id);
+        repository.delete(personInDb);
+        return personInDb;
+    }
+
+    public Person delete(Person person) {
+        return delete(person.getId());
+    }
+
+}