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1. how to detect of a requested url contains query string?    stackoverflow.com

hi all i want to detect if a requested url contains query string or not how to do so ?

2. A Java Servlet problem where I have a Null Parameter from the HTTPRequest object, how do I send the parameter using URL Queries?    stackoverflow.com

I decided to send a request to a Java Servlet by using webpage links that send URL requests to the Java Servlet. So, in my attribute I have something like the ...

3. Is there way to query "url-pattern" property from Java code of servlet filter?    stackoverflow.com

Is there way to obtain "url-pattern" property from Java code of servlet filter ? I know I can pass same pattern in servlet init params but it seems redundant. Thanks!