spring boot 自定义Repository实现

package com.wisely.support;

import java.io.Serializable;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.repository.NoRepositoryBean;

@NoRepositoryBean
public interface CustomRepository<T, ID extends Serializable>extends JpaRepository<T, ID> ,JpaSpecificationExecutor<T>{
	
	Page<T> findByAuto(T example,Pageable pageable);
	

}

package com.wisely.support;

import java.io.Serializable;

import javax.persistence.EntityManager;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.support.SimpleJpaRepository;

import static com.wisely.specs.CustomerSpecs.*;

public class CustomRepositoryImpl <T, ID extends Serializable> 
					extends SimpleJpaRepository<T, ID>  implements CustomRepository<T,ID> {
	
	private final EntityManager entityManager;
	
	public CustomRepositoryImpl(Class<T> domainClass, EntityManager entityManager) {
		super(domainClass, entityManager);
		this.entityManager = entityManager;
	}

	@Override
	public Page<T> findByAuto(T example, Pageable pageable) {
		return findAll(byAuto(entityManager, example),pageable);
	}


}

package com.wisely.support;

import java.io.Serializable;

import javax.persistence.EntityManager;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.support.JpaRepositoryFactory;
import org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean;
import org.springframework.data.jpa.repository.support.SimpleJpaRepository;
import org.springframework.data.repository.core.RepositoryInformation;
import org.springframework.data.repository.core.RepositoryMetadata;
import org.springframework.data.repository.core.support.RepositoryFactorySupport;

public class CustomRepositoryFactoryBean<T extends JpaRepository<S, ID>, S, ID extends Serializable>
		extends JpaRepositoryFactoryBean<T, S, ID> {// 1

	@Override
	protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {// 2
		return new CustomRepositoryFactory(entityManager);
	}

	private static class CustomRepositoryFactory extends JpaRepositoryFactory {// 3


		public CustomRepositoryFactory(EntityManager entityManager) {
			super(entityManager);
		}

		@Override
		@SuppressWarnings({"unchecked"})
		protected <T, ID extends Serializable> SimpleJpaRepository<?, ?> getTargetRepository(
				RepositoryInformation information, EntityManager entityManager) {// 4
			return new CustomRepositoryImpl<T, ID>((Class<T>) information.getDomainType(), entityManager);

		}

		@Override
		protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {// 5
			return CustomRepositoryImpl.class;
		}
	}
}