基于注解的SpringMVC整合JPA(二)

public boolean update(Object object) {
try {
entityManager.merge(object);
return true;
} catch (Exception e) {
e.printStackTrace();
}
return false;
}

@SuppressWarnings("unchecked")
public List listAll() {
try {
Query query=entityManager.createQuery(" from Employee ");
return query.getResultList();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

}
BaseService
package com.sj.service;

import java.util.List;

public interface BaseService {

List listAll();
Object findById(Class c,int id);
boolean save(Object object);
boolean update(Object object);