simple_order_demo/src/main/java/com/example/demo/repository/DiancanRespository.java

package com.example.demo.repository;

import com.example.demo.model.Diancan;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

public interface DiancanRespository extends JpaRepository<Diancan,String>, JpaSpecificationExecutor<Diancan> {
    Integer countByZhuohao(String zhuohao);
}