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System.out.println(s.replaceAll("(?s)(Registrar\\.value=').*?(')", "$1$2"));
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Java code:
String str = "Registrar.value='ϵͳ\'¹ÜÀíÔ±'"; // »¹ÓÐתÒåµÄÇé¿ö
str = str.replaceAll("(Registrar\\.value=')((?:\\\\.|[^'])*)(')", "$1$2");
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