关于源代码中提取网址的问题

u橙宝贝

file:///C:\Users\Dell\AppData\Roaming\Tencent\Users\510998473\QQ\WinTemp\RichOle\J`U61]I@U86MGDH{9WC{G4D.pngfile:///C:\Users\Dell\AppData\Roaming\Tencent\Users\510998473\QQ\WinTemp\RichOle\J`U61]I@U86MGDH{9WC{G4D.png
我想提取红色部分的网址，前后截取应该怎么写规则呢，求指教

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