title: Eclipse|Maven: Can't download source code of jar package?
body: <p>There are plenty of similar questions in stackoverflow, like <a href="https://stackoverflow.com/questions/2059431/get-source-jars-from-maven-repository">Get source JARs from Maven repository</a>, <a href="https://stackoverflow.com/questions/5780758/maven-always-download-sources-and-javadocs">Maven – Always download sources and javadocs</a>, etc.</p>
  
  <p>Follow the instructions suggested by those answers, Eclipse still can't download source code of jar package, but <code>javadoc</code> has been downloaded.</p>
  
  <p>Does someone can tell me why? I fell quite confused.</p>