12.SqlSession 的工具类 获取sqlsession

public class SqlSessionUtils {
    private static SqlSessionFactory factory = null;
    //加载类自动加载动态代码块
    static {
        try {
//读取配置文件
InputStream resource = Resources.getResourceAsStream("SqlMapConfig.xml");
//使用SqlSessionFactoryBuilder()创建SqlSessionFactory
            factory = new SqlSessionFactoryBuilder().build(resource);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
//获取sqlSession方法
    public static SqlSession getSqlSession(){
        SqlSession session = null;
        if (factory != null){
//此处设置为非自动提交事务
            session = factory.openSession();
        }
//返回sqlSession对象
        return session;
    }
}