Java String：替换包含$ sign的字符串

Question

How can I replace a String $1 in Java? I tried this, but this doesn't replace it:

System.out.println(someHTMLCodeAsString.replaceAll("$1", "REPLACED"));

Answer 1

The $ is being interpreted as regex instead of as a character (it means 'end of line'). Try System.out.println(someHTMLCodeAsString.replaceAll("\\\\$1", "REPLACED"));

Answer 2

尝试

 System.out.println(someHTMLCodeAsString.replace("$1", "REPLACED"));

Answer 3

You Can Simply use this method:

someHTMLCodeAsString.replaceAll("\\$1", "REPLACED").

That replace All "$" to "REPLACED" simply!

Answer 4

从Java API文档 ：“请注意，替换字符串中的反斜杠（）和美元符号（$）可能导致结果与将其视为文字替换字符串时的结果不同;请参阅Matcher.replaceAll。使用Matcher.quoteReplacement（ java.lang.String）如果需要，可以抑制这些字符的特殊含义。“

Answer 5

You've gotten bits and pieces of a response. Peter Lawrey is correct. You need to escape the $ with a regex escape not a string escape, thus the double \\.

System.out.println(someHTMLCodeAsString.replaceAll("\\\\$1", "REPLACED"));

Answer 6

或者，让正则表达式库为您处理：

someHTMLCodeAsString.replaceAll(Pattern.quote("$1"), "REPLACED")