html - What is the meaning of ? (question mark) in a URL string?

Question

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

What is the difference between using

href="../usermanagement/search_user.jsp?"

and

href="../usermanagement/search_user.jsp?pagename=navigation"

in file navigation.jsp?

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1 Reply

深蓝 · Answer 1 · 2021-10-16T23:07:22+0000

Its name is query string. After the question mark you can pass key-value pairs and use them server-side.