使用正則表達式從字符串中刪除一些額外的文本

Question

我正在構建SMS網關，如果SMS消息在將其持久保存到數據庫之前有任何憑據信息（例如密碼），我想要屏蔽該信息。

下面是代碼：

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); 

我在正則表達式知識貧乏，所以我需要你的幫助，如果可以得到下面的輸出：

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); 

給你：

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