简介
学习GraalVM以及Picocli的时候，将官方案例改造了下，做成一个顺手的工具，配合alfred使用体验还是很友好的
功能
./checksum -h
Usage: checksum [-hV] [-a=<algorithm>] [-f=<file>] [-o=<output>] [-s=<str>]
Prints the checksum (SHA-256 by default) of a file to STDOUT.
-a, --algorithm=<algorithm>
MD5, SHA-1, SHA-256, ...
-f, --file=<file> The file whose checksum to calculate.
-h, --help Show this help message and exit.
-o, --output=<output> ORIGIN, ALFRED is option, The checksum output format
-s, --string=<str> The string whose checksum to calculate.
-V, --version Print version information and exit.
Example
字符串计算摘要
$ ./checksum -a md5 -s hello
input string: hello
5d41402abc4b2a76b9719d911017c592文件计算摘要
$ ./checksum -a md5 -f hello.txt
input filename: hello.txt
5d41402abc4b2a76b9719d911017c592
Alfred 这种方式需要在Release中下载对应的workflow,安装后即可使用
