added common validators

Author: springframeworkguru

src/main/java/guru/springframework/commands/CustomerForm.java

@@ -1,7 +1,10 @@
 package guru.springframework.commands;
 
+import org.hibernate.validator.constraints.Email;
 import org.hibernate.validator.constraints.NotEmpty;
 
+import javax.validation.constraints.Size;
+
 /**
  * Created by jt on 12/22/15.
  */
@@ -12,11 +15,15 @@ public class CustomerForm {
     private Integer customerVersion;
 
     @NotEmpty
+    @Size(min = 2)
     private String userName;
     private String passwordText;
     private String passwordTextConf;
     private String firstName;
     private String lastName;
+
+    @NotEmpty
+    @Email
     private String email;
     private String phoneNumber;