PERL参数指令技：Getopt::Long

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我是靠谱客的博主缓慢水池，这篇文章主要介绍PERL参数指令技：Getopt::Long，现在分享给大家，希望可以做个参考。

复制代码

#!/usr/bin/perl
use Getopt::Long;
Getopt::Long::GetOptions(
'page=i'
=> $page,
'onoff!'
=> $onoff,
'help|h'
=> $wants_help,
'name=s'
=> $name,
'number:i' => $number);
if(defined($page)){
print "page flag set to $page ";
}
if(defined($onoff)){
print "onoff flag set to $onoff ";
}
if(defined($wants_help)){
print "help flag set to $wants_help ";
}
if(defined($name)){
print "name flag set to $name ";
}
if(defined($number)){
print "number flag set to $number ";
}
结果：

#C:UsersliuweicdemoLearnLab>triggeraction.pl
-onoff
#onoff flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-page 50
#page flag set to 50
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-page 86
#page flag set to 86
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-onoff
#onoff flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-noonoff
#onoff flag set to 0
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-help
#help flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-help
5
#help flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-h
#help flag set to 1
###################################################################

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#!/usr/bin/perl
use Getopt::Long;
Getopt::Long::GetOptions(
'page=i'
=> $page,
'onoff!'
=> $onoff,
'help|h'
=> $wants_help,
'name=s'
=> $name,
'number:i' => $number);
if(defined($page)){
print "page flag set to $page ";
}
if(defined($onoff)){
print "onoff flag set to $onoff ";
}
if(defined($wants_help)){
print "help flag set to $wants_help ";
}
if(defined($name)){
print "name flag set to $name ";
}
if(defined($number)){
print "number flag set to $number ";
}
结果：

#C:UsersliuweicdemoLearnLab>triggeraction.pl
-onoff
#onoff flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-page 50
#page flag set to 50
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-page 86
#page flag set to 86
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-onoff
#onoff flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-noonoff
#onoff flag set to 0
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-help
#help flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-help
5
#help flag set to 1
#C:UsersliuweicdemoLearnLab>triggeraction.pl
-h
#help flag set to 1
###################################################################

请结合下面两篇文章学习：

http://www.php-oa.com/2009/04/04/perl_getopt-long.html

http://zhujian0805.blog.sohu.com/120507724.html

参数指令说明：

verbose+’ 接有 + 的选项不接收变量,后面不需要加内容.直接使用就行了,会在每次出现时增加一次变量,就是讲命行时在参数中 -verbose -verbose 出现二次时 verbose 的值就会变成 2.
‘more!’        接有 ! 的选项不接收变量(也就是讲后面不需要加参数 –more 来使用就行了),只要命令行中出现了这个参数,就会默认是 1 ,是用来设置打开和关掉一个功能的>.可以在参数前加 no 变成负的例如-nomore.
‘flag=s’        接有 = 的字符串要求接字符串（s）、整数（i）,或者浮点（f）等类型的变量.
‘debug:i’      接有 : 的选项会接受缺省为0或者为空字符串的可选变量
‘test|t’          接有 | 的选项表示可以给 –test 简写为 -t.

‘lib=s’     => @libs    如果相关联的变量是个数组, 如这个地方的 @libs, 那么选项可以多次出现, 值可以被推到数组里.
‘flag=s’    => %flags 如果相关联的变量是个散列, 那么就要求一个键=值（key=value）对, 并被插入到散列里.

备注:
在匹配参数名的时候,GetOptions 在缺省设置下会忽略大小写,默认参数被简写为唯一的最短字符串(首字母)（例如,-m 代表 -more. 相同的首字母时,会加上第二个字母来区分

PS：转载请注明出处，作者No. Liu