modify QueryServlet.java
dao refactor
Merge pull request #60 from forumbyr/master

refactor:add queryParam
Merge pull request #61 from forumbyr/master

refactor:add ip queryparam
添加 BaseDao
Merge pull request #62 from larrychen8276/master

merge. refactor:dao util
Merge pull request #4 from cnnic/master

merge dao util