3、关于利用SqlSessionFactoryBuilder去构建SqlSessionFactory，以及Mybatis的dao的实现

// mybatis配置文件
String resource = "SqlMapConfig.xml";
// 得到配置文件流
InputStream inputStream = Resources.getResourceAsStream(resource);

// 创建会话工厂，传入mybatis的配置文件信息
sqlSessionFactory = new SqlSessionFactoryBuilder()
.build(inputStream);

Public interface UserDao {
public User getUserById(int id) throws Exception;
public void insertUser(User user) throws Exception;
}

Public class UserDaoImpl implements UserDao {

//注入SqlSessionFactory
public UserDaoImpl(SqlSessionFactory sqlSessionFactory){
this.setSqlSessionFactory(sqlSessionFactory);
}

private SqlSessionFactory sqlSessionFactory;
@Override
public User getUserById(int id) throws Exception {
SqlSession session = sqlSessionFactory.openSession();
User user = null;
try {
//通过sqlsession调用selectOne方法获取一条结果集
//参数1：指定定义的statement的id,参数2：指定向statement中传递的参数
user = session.selectOne("test.findUserById", 1);
System.out.println(user);

} finally{
session.close();
}
return user;
}

@Override
Public void insertUser(User user) throws Exception {
SqlSession sqlSession = sqlSessionFactory.openSession();
try {
sqlSession.insert("insertUser", user);
sqlSession.commit();
} finally{
session.close();
}

}
}