Groovy:带有嵌入引号的字符串don';我不能按预期执行
这很奇怪:使用groovy字符串保存一些命令行以执行,我发现有时候如果字符串中有引号字符,执行就会自动失败 WTF?(更新,见下文。) 这是我的测试程序:Groovy:带有嵌入引号的字符串don';我不能按预期执行,groovy,Groovy,这很奇怪:使用groovy字符串保存一些命令行以执行,我发现有时候如果字符串中有引号字符,执行就会自动失败 WTF?(更新,见下文。) 这是我的测试程序: print " 1: " ; "grep nameserver /etc/resolv.conf".execute().text.eachLine {println it } ; println "" print " 2: " ; "grep 'nameserver' /etc/resolv.conf".execute().
print " 1: " ; "grep nameserver /etc/resolv.conf".execute().text.eachLine {println it } ; println ""
print " 2: " ; "grep 'nameserver' /etc/resolv.conf".execute().text.eachLine {println it } ; println ""
print " 3: " ; """grep nameserver /etc/resolv.conf""".execute().text.eachLine {println it } ; println ""
print " 4: " ; """grep "nameserver" /etc/resolv.conf""".execute().text.eachLine {println it } ; println ""
print " 5: " ; """grep 'nameserver' /etc/resolv.conf""".execute().text.eachLine {println it } ; println ""
print " 6: " ; "awk /nameserver/ /etc/resolv.conf".execute().text.eachLine{ println it } ; println ""
print " 7: " ; "awk '/nameserver/' /etc/resolv.conf".execute().text.eachLine{ println it } ; println ""
print " 8: " ; """awk "/nameserver/" /etc/resolv.conf""".execute().text.eachLine{ println it } ; println ""
print " 9: " ; """awk '/nameserver/' /etc/resolv.conf""".execute().text.eachLine{ println it } ; println ""
print "10: " ; """awk "/nameserver/{print \$2}" /etc/resolv.conf""".execute().text.eachLine{ println it } ; println ""
return
结果如下:
$ groovy weird.groovy
1: nameserver 10.3.0.101
nameserver 10.4.1.237
nameserver 10.2.1.34
2:
3: nameserver 10.3.0.101
nameserver 10.4.1.237
nameserver 10.2.1.34
4:
5:
6: nameserver 10.3.0.101
nameserver 10.4.1.237
nameserver 10.2.1.34
7:
8: nameserver 10.3.0.101
nameserver 10.4.1.237
nameserver 10.2.1.34
domain lnx.copansys.com
search lnx.copansys.com tst.copansys.com copansys.com
9:
10:
更新
下面是另一个例子:
"bash -c echo Hello".execute().text.eachLine{ println it }
"bash -c echo 'Hello'".execute().text.eachLine{ println it }
"bash -c echo \'Hello\'".execute().text.eachLine{ println it }
结果:
groovy> "bash -c echo Hello".execute().text.eachLine{ println it }
groovy> "bash -c echo 'Hello'".execute().text.eachLine{ println it }
groovy> "bash -c echo \'Hello\'".execute().text.eachLine{ println it }
'Hello!'
请注意,嵌入带引号的反斜杠似乎没有帮助。似乎您期望的python风格引用ie
““
”(”
)和“
”(“
)在groovy中不存在,因此当您使用字符串执行命令时,字符串中的”
或“
”文本必须以\/code>和\/code>的形式编写,它们不会被命令shell解析。引号传递给实际执行的命令;在本例中,grep和awk
用echo替换grep和awk可以说明这一点:
print " 1: " ; "echo something".execute().text.eachLine {println it } ; println ""
print " 2: " ; "echo 'something'".execute().text.eachLine {println it } ; println ""
print " 3: " ; """echo something""".execute().text.eachLine {println it } ; println ""
print " 4: " ; """echo "something" """.execute().text.eachLine {println it } ; println ""
print " 5: " ; """echo 'something'""".execute().text.eachLine {println it } ; println ""
其结果是:
1: something
2: 'something'
3: something
4: "something"
5: 'something'
一个简单的解决方法是将命令行构建为字符串列表:
["awk", 'BEGIN { print "hello" }'].execute().text
如果您需要更好地控制命令的解析方式,请查看Java类String.execute()
。谢谢,但是反斜杠引用似乎没有帮助,请参阅更新的示例。相关的,正在执行的包含空格的字符串--