java - mvn dependency for repository.save() -

i struggling this. every time add main class in repository.save(customerdetails) error message. when click on error asked add dependency doesn't tell me dependency add.

how figure out?

here's class:

package com.example.customer.application;  import com.example.customer.customerrepository.customerdetailrepository; import com.example.customer.model.customerdetails; import org.springframework.boot.autoconfigure.springbootapplication;  import java.util.arraylist; import java.util.list;  @springbootapplication public class accountapplication {      public static void main(string[] args) {      }      private void name(customerdetailrepository repository) {         list<customerdetails> cd = new arraylist<>();         cd.add(new customerdetails(1, "foo", "bar"));         cd.add(new customerdetails(2, "foo1", "bar1"));           customerdetails cdd = new customerdetails(1, "a", "b");         {          }          repository.save(customerdetails); error is.       }  } 

here's main class:

package com.example.customer.model;  import com.example.customer.customerapplication; import org.springframework.boot.autoconfigure.domain.entityscan;  import javax.annotation.generated; import javax.persistence.entity; import javax.persistence.generatedvalue; import javax.persistence.generationtype;   @entity public class customerdetails {       private long id;     private string name;     private string address;       public customerdetails() {        }      public customerdetails(long id, string name, string address) {         this.id = id;         this.name = name;         this.address = address;     }      public long getid() {         return id;     }      public void setid(long id) {         this.id = id;     }      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      public string getaddress() {         return address;     }      public void setaddress(string address) {         this.address = address;     }  } 

here's controller code

package com.example.customer.controller;  import com.example.customer.model.customerdetails; import com.sun.org.apache.bcel.internal.generic.return; import org.springframework.boot.autoconfigure.domain.entityscan; import org.springframework.stereotype.controller; import org.springframework.stereotype.repository; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestmethod; import org.springframework.web.bind.annotation.restcontroller;  import javax.annotation.generated; import java.util.arraylist; import java.util.list;    @restcontroller public class customerapplication {      @requestmapping(method = requestmethod.get, path = "/findcustomer")     public customerdetails createnewcustomerrecord() {          return new customerdetails(1, "sarah", "88 strong road");     }  } 

can help? know dependency can add fix bug?