code4craft/webmagicGitHub
calls crawler4j “Choose it if you need a simple Java crawler library but accept it is unmaintained since 2019.”
A scalable web crawler framework for Java.
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yasserg/crawler4j Alternatives
crawler4j is queued for analysis. Crawling candidates and ranking them takes a few minutes. This page updates itself when the list exists — you can also come back later.
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These projects were analysed and named crawler4j among their alternatives. The relationship is not symmetric — how crawler4j rates them is a separate judgement, made when crawler4j is analysed in its own right.