可以借助svn工具进行下载，实现只下载repo下的指定文件夹内容
背景
需要下载这个文件夹下所有内容https://github.com/rabbitmq/rabbitmq-tutorials/tree/master/java-idea
解决
master分支（这里就是）
将"/tree/master" 修改为"/trunk"（这个操作答主提到玩过google code应该熟悉）即
https://github.com/rabbitmq/rabbitmq-tutorials/trunk/java-idea
输入
svn checkout https://github.com/rabbitmq/rabbitmq-tutorials/trunk/java-idea
如果不是master
将/trunk/换成/braches/branchname/就可以
备注
如果之前没用过svn,可参考下面两种安装
1.windows需要安装TortoiseSVN
2.因为比较喜欢linux那种安装方式，另外也安装了wsl，直接在指定文件夹shift+右键打开linux shell,输入
syz@lonelyisland-desktop:/mnt/c/Users/10758/Desktop$ sudo apt install subversion
[sudo] password for syz:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
libfreetype6
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
libapr1 libaprutil1 libserf-1-1 libsvn1
Suggested packages:
db5.3-util libapache2-mod-svn subversion-tools
The following NEW packages will be installed:
libapr1 libaprutil1 libserf-1-1 libsvn1 subversion
0 upgraded, 5 newly installed, 0 to remove and 2 not upgraded.
Need to get 2237 kB of archives.
After this operation, 9910 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://mirrors.aliyun.com/ubuntu bionic/main amd64 libapr1 amd64 1.6.3-2 [90.9 kB]
Get:2 http://mirrors.aliyun.com/ubuntu bionic/main amd64 libaprutil1 amd64 1.6.1-2 [84.4 kB]
Get:3 http://mirrors.aliyun.com/ubuntu bionic/universe amd64 libserf-1-1 amd64 1.3.9-6 [44.4 kB]
Get:4 http://mirrors.aliyun.com/ubuntu bionic/universe amd64 libsvn1 amd64 1.9.7-4ubuntu1 [1183 kB]
Get:5 http://mirrors.aliyun.com/ubuntu bionic/universe amd64 subversion amd64 1.9.7-4ubuntu1 [834 kB]
Fetched 2237 kB in 1s (3876 kB/s)
Selecting previously unselected package libapr1:amd64.
(Reading database ... 28674 files and directories currently installed.)
Preparing to unpack .../libapr1_1.6.3-2_amd64.deb ...
Unpacking libapr1:amd64 (1.6.3-2) ...
Selecting previously unselected package libaprutil1:amd64.
Preparing to unpack .../libaprutil1_1.6.1-2_amd64.deb ...
Unpacking libaprutil1:amd64 (1.6.1-2) ...
Selecting previously unselected package libserf-1-1:amd64.
Preparing to unpack .../libserf-1-1_1.3.9-6_amd64.deb ...
Unpacking libserf-1-1:amd64 (1.3.9-6) ...
Selecting previously unselected package libsvn1:amd64.
Preparing to unpack .../libsvn1_1.9.7-4ubuntu1_amd64.deb ...
Unpacking libsvn1:amd64 (1.9.7-4ubuntu1) ...
Selecting previously unselected package subversion.
Preparing to unpack .../subversion_1.9.7-4ubuntu1_amd64.deb ...
Unpacking subversion (1.9.7-4ubuntu1) ...
Setting up libapr1:amd64 (1.6.3-2) ...
Setting up libaprutil1:amd64 (1.6.1-2) ...
Setting up libserf-1-1:amd64 (1.3.9-6) ...
Setting up libsvn1:amd64 (1.9.7-4ubuntu1) ...
Setting up subversion (1.9.7-4ubuntu1) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
syz@lonelyisland-desktop:/mnt/c/Users/10758/Desktop$ svn checkout https://github.com/rabbitmq/rabbitmq-tutorials/trun
k/java-idea
A java-idea/.idea
A java-idea/.idea/.name
A java-idea/.idea/libraries
A java-idea/.idea/libraries/lib.xml
A java-idea/.idea/misc.xml
A java-idea/.idea/modules.xml
A java-idea/.idea/vcs.xml
A java-idea/.idea/workspace.xml
A java-idea/lib
A java-idea/lib/amqp-client-5.7.1.jar
A java-idea/lib/slf4j-api-1.7.26.jar
A java-idea/lib/slf4j-simple-1.7.26.jar
A java-idea/src
A java-idea/src/EmitLog.java
A java-idea/src/EmitLogDirect.java
A java-idea/src/EmitLogHeader.java
A java-idea/src/EmitLogTopic.java
A java-idea/src/NewTask.java
A java-idea/src/PublisherConfirms.java
A java-idea/src/RPCClient.java
A java-idea/src/RPCServer.java
A java-idea/src/ReceiveLogHeader.java
A java-idea/src/ReceiveLogs.java
A java-idea/src/ReceiveLogsDirect.java
A java-idea/src/ReceiveLogsTopic.java
A java-idea/src/Recv.java
A java-idea/src/Send.java
A java-idea/src/Worker.java
Checked out revision 1060.
syz@lonelyisland-desktop:/mnt/c/Users/10758/Desktop$
至此，该文件夹已经下载到此目录下了