既然您说不想在不同的类中使用数据访问方法（在Anish的回答中），所以我想为什么不尝试这样的方法。
public class Records { public interface RecordFetcher<T>{ public List<T> getRecords(); } static RecordFetcher<Fruit> Fruit=new RecordFetcher<Fruit>(){ public List<Fruit> getRecords() { ... } }; static RecordFetcher<User> User=new RecordFetcher<User>(){ public List<User> getRecords() { ... } }; public static void main(String[] args) { List<Fruit> fruitRecords=Records.Fruit.getRecords(); List<User> userRecords=Records.User.getRecords(); }}编辑：
我想再添加一个实现。
public class Test { public static void main(String[] args) { Test dataAccess=new Test(); List<Fruit> FruitList=dataAccess.getAllRecords(Fruit.myType); List<User> UserList=dataAccess.getAllRecords(User.myType); } <T> List<T> getAllRecords(T cl) { List<T> list=new ArrayList<T>(); if(cl instanceof Fruit) { // Use JDBC and SQL SELECt * FROM fruit } else if(cl instanceof User) { // Use JDBC and SQL SELECt * FROM user } return list; }}class Fruit{ static final Fruit myType; static {myType=new Fruit();}}class User{ static final User myType; static {myType=new User();}}编辑 ：
我认为这种实现方式就是您所要求的
public class Test { public static void main(String[] args) throws InstantiationException, IllegalAccessException { Test dataAccess=new Test(); List<Fruit> FruitList=dataAccess.getAllRecords(Fruit.class); List<User> UserList=dataAccess.getAllRecords(User.class); } <T> List<T> getAllRecords(Class<T> cl) throws InstantiationException, IllegalAccessException { T inst=cl.newInstance(); List<T> list=new ArrayList<T>(); if(inst instanceof Fruit) { // Use JDBC and SQL SELECt * FROM user } else if(inst instanceof User) { // Use JDBC and SQL SELECt * FROM fruit } return list; }}
