match string between two symbols and replace

I have a file with the many links like this: http://example.com/mall/mall/detail3.jsp?proID=2114280 http://example.com/mall/member/member/bookshelves/add.jsp?proID=3354136&productName=something http://example.com/mall/bestbookTW//mall/detail3.jsp?proID=3435839&c=532166&id=954325 And I want it to become this: http://example.com/mall/mall/detail3.jsp?proID=FUZZ http://example.com/mall/member/member/bookshelves/add.jsp?proID=FUZZ&productName=FUZZ http://example.com/mall/bestbookTW//mall/detail3.jsp?proID=FUZZ&c=FUZZ&id=FUZZ How can I do this with sed or grep or awk?

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