简化代码，实现一个静态的工具类来实现获取SqlSession
主要有getSqlSessionFactory（）和getSqlSession()
public class MybatisUtil {
private static SqlSessionFactory sqlSessionFactory;
/**
* 构建SqlSessionFactory工厂
*/
public static SqlSessionFactory getSqlSessionFactory(){
if(sqlSessionFactory==null){
try {
//通过配置文件获取输入流
InputStream inputStream=Resources.getResourceAsStream("mybatis-config.xml");
//通过Builder和输入流构建sqlSessionFactory工厂
sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
return sqlSessionFactory;
}
/**
* 获取sqlSession
*/
public static SqlSession getSqlSession(){
return getSqlSessionFactory().openSession();
}
}