Simplified + refactored

persistence-modules/spring-data-jpa-5/src/main/java/com/baeldung/Application.java

@@ -34,22 +34,18 @@ public class Application {
     }
 
     private void basicLoadAndSave() {
-        Customer myCustomer = service.addCustomer("John", "Doe");
+        Customer myCustomer = service.addCustomer("John");
         logger.info("Insert -- " + myCustomer.toString());
-        myCustomer = service.updateCustomer(myCustomer.id, "john@doe.com", "+00", "Route 66");
+        myCustomer = service.updateCustomer(myCustomer.id, "+00");
         logger.info("Update -- " + myCustomer.toString());
     }
     
     private void basicLoadAndSaveWithMapper() {
-        CustomerDto dto = new CustomerDto();
+        CustomerDto dto = new CustomerDto(null);
-        dto.firstName = "Johnny";
+        dto.name = "Johnny";
-        dto.lastName = "Doe";
         Customer entity = service.addCustomer(dto);
         logger.info("Insert -- " + entity.toString());
-        CustomerDto dto2 = new CustomerDto();
+        CustomerDto dto2 = new CustomerDto(entity.id);
-        dto2.id = entity.id;
-        dto2.address = "Mountain View";
-        dto2.email = "doe@mail.com";
         dto2.phone = "+44";
         entity = service.updateCustomer(dto2);
         logger.info("Update -- " + entity.toString());

persistence-modules/spring-data-jpa-5/src/main/java/com/baeldung/model/Customer.java

@@ -10,10 +10,7 @@ public class Customer {
 
     @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
     public long id;
-    public String firstName;
+    public String name;
-    public String lastName;
-    public String address;
-    public String email;
     public String phone;
     //...
     public String phone99;
@@ -21,7 +18,7 @@ public class Customer {
     public Customer() {}
     
     @Override public String toString() {
-        return String.format("Customer %s %s, Address: %s, Email: %s, Phone: %s", 
+        return String.format("Customer %s, Phone: %s", 
-                this.firstName, this.lastName, this.address, this.email, this.phone);
+                this.name, this.phone);
     }
 }

persistence-modules/spring-data-jpa-5/src/main/java/com/baeldung/model/CustomerDto.java

@@ -1,33 +1,26 @@
 package com.baeldung.model;
 
 public class CustomerDto {
-    public long id;
+    private long id;
-    public String firstName;
+    public String name;
-    public String lastName;
-    public String address;
-    public String email;
     public String phone;
     //...
-    public String phone99;
+    private String phone99;
     
-    public CustomerDto() {}
+    public CustomerDto(long id) {
+    	this.id = id;
+    }
     
     public CustomerDto(Customer c) {
         this.id = c.id;
-        this.firstName = c.firstName;
+        this.name = c.name;
-        this.lastName = c.lastName;
-        this.address = c.address;
-        this.email = c.email;
         this.phone = c.phone;
     }
     
     public Customer convertToEntity() {
         Customer c = new Customer();
         c.id = id;
-        c.firstName = firstName;
+        c.name = name;
-        c.lastName = lastName;
-        c.address = address;
-        c.email = email;
         c.phone = phone;
         return c;
     }

persistence-modules/spring-data-jpa-5/src/main/java/com/baeldung/service/CustomerService.java

@@ -16,18 +16,15 @@ public class CustomerService {
     @Autowired CustomerRepository repo;
     @Autowired CustomerMapper mapper;
 
-    public Customer addCustomer(String firstName, String lastName) {
+    public Customer addCustomer(String name) {
         Customer myCustomer = new Customer();
-        myCustomer.firstName = firstName;
+        myCustomer.name = name;
-        myCustomer.lastName = lastName;
         repo.save(myCustomer);
         return myCustomer;
     }
 
-    public Customer updateCustomer(long id, String email, String phone, String address) {
+    public Customer updateCustomer(long id, String phone) {
         Customer myCustomer = repo.findById(id);
-        myCustomer.address = address;
-        myCustomer.email = email;
         myCustomer.phone = phone;
         repo.save(myCustomer);
         return myCustomer;