Merge pull request #48 from JohnCny/master

merge
Merge pull request #49 from JohnCny/master

merge
Merge pull request #75 from qkhj/master

add
Merge pull request #50 from JohnCny/master

merge
Merge pull request #76 from qkhj/master

[add]遗漏
Merge pull request #51 from JohnCny/master

merge
Merge pull request #77 from tanwh/master

重新提交被覆盖的代码
重新提交被覆盖的代码
[add]几个查询和导出功能
Merge pull request #78 from tanwh/master

重新提交被覆盖的代码
Merge pull request #25 from JohnCny/master

merge