java 反射详解

User user=new User();

User user =(User) Class.forName("com.xq.kafka.demo.User").newInstance();

public interface IUser {
    String getName();
    void setName(String name);
}

public class RedisUserImpl implements IUser {
    private String name;
    @Override
    public String getName() {
        //从redis取数据
        return this.name;
    }
    @Override
    public void setName(String name) {
        //往redis写数据
        this.name = name;
    }
}

public class HbaseUserImpl implements IUser {
    @Override
    public String getName() {
        //从hbase取数据
        return null;
    }
    @Override
    public void setName(String name) {
        //往hbase写数据
    }
}

IUser iUser =(IUser) Class.forName("com.xq.kafka.demo.RedisUserImpl").newInstance();
iUser.setName("1");
System.out.println(iUser.getName());