日本語文字列のunicode化
C:\Program Files\Java\jdk1.8.0_351\bin>native2ascii.exe C:\dirtest\sample.properties C:\dirtest\sample.properties.0
sample.properties
name=sato
price=100
address:大阪
age:19
sample.properties.0
name=sato
price=100
address:\u879f\uff67\u9ae6\uff6a
age:19