test0修改为test1，给test0生成patch文件

diff -uN test0 test1 > test1.patch

给test0打patch文件，升级为test1

patch -R test0 < test1.patch 

生成MergeRegionInputFormat对svn修改的patch文件

svn diff MergeRegionInputFormat.java > testpath

给MergeRegionInputFormat打patch文件，升级为最新patch版

svn patch MergeRegionInputFormat < testpath