JavaSE document download,&＃39;?&＃39; is java version number,for example 8,7,6。
http://docs.oracle.com/javase/&＃xff1f;/docs/index.html
Srping release version download
http://repo.springsource.org/libs-release-local/org/springframework/spring/
转:https://www.cnblogs.com/ywcbs/p/6006575.html
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