$ git push -u origin master To github.com:liuzeyu12a/Servlet_Login.git ! [rejected] master -> master (fetch first) error: failed to push some refs to 'email@example.com:liuzeyu12a/Servlet_Login.git' hint: Updates were rejected because the remote contains work that you do hint: not have locally. This is usually caused by another repository pushing hint: to the same ref. You may want to first integrate the remote changes hint: (e.g., 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details.
Push rejected: Push to origin/master was rejected
直接是解决办法，直接打开你要上传代码的文件夹位置鼠标右键git Bash Here然后直接下面两行命令解决问题
git pull origin master –allow-unrelated-histories
git push -u origin master -f