http://en.wikipedia.org/wiki/Query_string
The series of pairs is separated by the ampersand, '&' (or semicolon, ';' for URLs embedded in HTML and not generated by a <form>...</form>; see below).
While there is no definitive standard, most web frameworks allow multiple values to be associated with a single field:[3][4]
For each field of the form, the query string contains a pair field=value. Web forms may include fields that are not visible to the user; these fields are included in the query string when the form is submitted
This convention is a W3C recommendation.[5] W3C recommends that all web servers support semicolon separators in addition to ampersand separators[6] to allowapplication/x-www-form-urlencoded query strings in URLs within HTML documents without having to entity escape ampersands.
在HTML规范里,分号是可以当&用的!!!擦!陷阱啊!!!
传的时候一定要URLENcode!!!