六.简单注解的使用

@Select("select * from user")
public List<User> getAllUser();

 <mappers>
        <mapper class="com.why.Mapper.UserMapper"/>
    </mappers>

 @Insert("insert into user(`name`,`pwd`) values(#{name},#{pwd})")
    public  int addUser(User user);

    @Update("update user set name=#{name},pwd=#{pwd} where id=#{id}")
    public int updateMsg(User user);

@Delete("delete from user where id=#{id}")
    public  int deleteByid(Integer id);

    public  static SqlSession getSession()
{
    //设置为自动提交 不用手动提交了
 return factory.openSession(true);

@Delete("delete from user where id=#{id}")
    public  int deleteByid(@Param("id") Integer 歪比歪比);