使用正则表达式从字符串中删除一些多余的文本

Question

我正在建立SMS网关，如果SMS消息具有任何凭据信息（例如密码），则在我将该网关掩盖之前将其持久保存到数据库中。

这是代码：

String message = "Your password is [MASK:1234]!";

boolean bMasked = message.matches("(\\[MASK:)*(\\])");
String plainText = message.replaceAll(..., "");
String withStars = message.replaceAll("...", "*");

System.out.println("bMasked: " + bMasked);
System.out.println("plainText: " + plainText);
System.out.println("withStars:  " + withStar);

我对正则表达式的了解很差，因此，如果可能，我需要您的帮助才能获得以下输出：

bMasked: true
plainText: Your password is 1234!
withStars: Your password is ****!

Answer 1

String message = "Your password is [MASK:1234]!";

boolean bMasked = message.matches(".*\\[MASK:[^\\]]*\\].*");
String plainText = message.replaceAll("\\[MASK:([^\\]]*)\\]", "$1");
String withStars = message.replaceAll("\\[MASK:[^\\]]*\\]", "******");

System.out.println("bMasked: " + bMasked);
System.out.println("plainText: " + plainText);
System.out.println("withStars:  " + withStars);

给你：

bMasked: true
plainText: Your password is 1234!
withStars:  Your password is ******!