push to origin/master was rejected错误解决方案
原因
初始化项目时，远程仓库自动建了某些文件，而本地仓库与远程仓库尚没有进行文件关联，因此需要将两个仓库的文件进行关联后提交。
操作步骤
切换到自己项目所在的目录
1.右键选择GIT BASH Here，Idea中可使用Alt+F12
2.在terminl窗口中依次输入命令：
git pull
git pull origin master
git pull origin master --allow-unrelated-histories
$ git pull
warning: no common commits
remote: Enumerating objects: 4, done.
remote: Counting objects: 100% (4/4), done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 4 (delta 0), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (4/4), done.
From gitee.com:courage129/mybatis
* [new branch] master -> origin/master
There is no tracking information for the current branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
If you wish to set tracking information for this branch you can do so with:
git branch --set-upstream-to=origin/<branch> master
$ git pull origin master
From gitee.com:courage129/mybatis
* branch master -> FETCH_HEAD
fatal: refusing to merge unrelated histories
$ git pull origin master --allow-unrelated-histories
From gitee.com:courage129/mybatis
* branch master -> FETCH_HEAD
error: Your local changes to the following files would be overwritten by merge:
.idea/compiler.xml .idea/encodings.xml .idea/inspectionProfiles/Project_Default.xml .idea/misc.xml .idea/workspace.xml Mybatis.iml
3.在idea中重新push自己的项目，成功！！