package com.yihaomen.test;



import java.io.Reader;

import java.util.List;



import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;



import com.yihaomen.mybatis.inter.IUserOperation;

import com.yihaomen.mybatis.model.User;

public class Test1{

	private static SqlSessionFactory sqlSessionFactory;

    private static Reader reader; 

public void getUserList(int id){

    SqlSession session = sqlSessionFactory.openSession();

    try {

        IUserOperation userOperation=session.getMapper(IUserOperation.class);          

        List<User> users = userOperation.selectUsers(id);

        for(User user:users){

            System.out.println(user.getId()+":"+user.getUserName()+":"+user.getUserAddress());

        }

        

    } finally {

        session.close();

    }

}

public static void main(String[] args) {

	int i=1;

    Test1 testUser=new Test1();

    testUser.getUserList(i);

}

}

Exception in thread "main" java.lang.NullPointerException

	at com.yihaomen.test.Test1.getUserList(Test1.java:17)

	at com.yihaomen.test.Test1.main(Test1.java:32)