How to detect of a requested URL contains query string?

I want to detect if a requested URL contains qu开发者_运维知识库ery string or not. How can I do so?

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You can directly use getQueryString() method

OR

You can check if your url has a query string or not by splitting it on "?" or finding index of the "?" character.

On splitting, your result array must have atleast length greater than 1 and if you take the index route, then the index must be greater than 0 since first character cant be a "?" assuming you will have correct url entered to check for query string.

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Something like requestedUrl.indexOf("?") > 0 should do. Because query string parameters are passed by appending ? to the url and then name/value pairs follow.