repo

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

 package io.zipcoder.crudapp;
 
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
 public class Person {
     private String firstName;
     private String lastName;
-    private int id;
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Integer id;
 
     public Person() {
 

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

 package io.zipcoder.crudapp;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.ArrayList;
 public class PersonController {
     private List<Person> personList = new ArrayList<>();
 
+    @Autowired
+    PersonRepository personRepository;
+
     public PersonController(){
 
     }
 
     @RequestMapping(value = "/people", method = POST)
     public Person createPerson(@RequestBody Person p){
-        return new Person();
+
+       return personRepository.save(p);
     }
 
     @RequestMapping(value = "/people/{id}", method = GET)
-    public Person getPerson(@PathVariable int id){
-        for(Person person: personList){
-            if(person.getId() == id){
-                return person;
-            }
-        }
-        return null;
+    public void getPerson(@PathVariable int id){
+        personRepository.findById(id);
     }
 
     @RequestMapping(value = "/people", method = GET)
-    public List<Person> getPersonList(){
-        return this.personList;
+    public void getPersonList(){
+        personRepository.findAll();
     }
 
     @RequestMapping(value = "/people", method = PUT)
     public Person updatePerson(@RequestBody Person p){
-        return new Person();
+        return personRepository.save(p);
     }
 
     @RequestMapping(value = "/people/{id}", method = DELETE)
     public void deletePerson(@PathVariable int id) {
-        personList.remove(id);
+        personRepository.deleteById(id);
     }
 }

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

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