Java - 用系统路径分隔符替换路径分隔符的所有实例

Question

我从这个答案中获取了同时匹配斜杠和反斜杠的正则表达式:Regex to match both slash in JAVA

    String path = "C:\\system/properties\\\\all//";
    String replaced = path.replaceAll("[/\\\\]+", 
        System.getProperty("file.separator"));

但是，我得到了错误:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 1

这个正则表达式有什么问题？删除 + 不会改变任何东西，错误信息是一样的...

Answer 1

记录在 the Javadoc 中:

Note that backslashes (\) and dollar signs ($) in the replacement string may cause the results to be different than if it were being treated as a literal replacement string; see Matcher.replaceAll. Use Matcher.quoteReplacement(java.lang.String) to suppress the special meaning of these characters, if desired.

所以你可以试试这个:

String replaced = path.replaceAll("[/\\\\]+", Matcher.quoteReplacement(System.
            getProperty("file.separator")));