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InputStream
input
=
Resources
.
getResourceAsStream
(
"SqlMapConfig.xml"
);
//读取配置文件,返回InputStream流对象
SqlSessionFactoryBuilder
builder
=
new
SqlSessionFactoryBuilder
();
//创建工厂类获取对象
SqlSessionFactory
sessionFactory
=
builder
.
build
(
input
);
//读取配置文件InputStream流,获得工厂类
SqlSession
session
=
sessionFactory
.
openSession
();
//获取Session会话类
-------------------------------------------------------------------------------------
SqlSessionFactory
openSession
();
//返回一个连接对象,SqlSession,事务需要手动提交
openSession
(
true
);
//返回一个连接对象,SqlSession,事务自动提交
-------------------------------------------------------------------------------------
SqlSession
selectOne
(
命名空间
.
id
,
与配置文件匹配的参数
);
// 返回的就是配置文件中指定返回类型的对象,取出一条记录.如果记录不唯一,抛出异常!返回结果不唯一
selectList
(
命名空间
.
id
,
与配置文件匹配的参数
);
//返回就是一个 List 类型的集合,泛型就是映射文件中指定的返回类型对象.查询出多条记录,或单个记录
getMapper
(
Class
clazz
);
//传递一个满足了mapper开发规范的接口类,返回一个代理类对象
close
();
//关闭连接
commit
();
//执行提交
rollback
();
//执行回滚
getMapper
(
T
.
class
);
//返回符合mapper开发规范的接口,代理对象
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