java - 替换 (") with (\"的正则表达式)？

Question

为什么以下不起作用:

      String test = "hello\"world".replaceAll("\"", "\\\"");
      System.out.println(test);

我想做的是用 \" 替换所有出现的 "。

所以我想得到输出:

hello\"world

Answer 1

对此，正则表达式有点矫枉过正。

myString.replace("\"", "\\\"")

应该做得很好，并且对于熟悉核心库的人来说更具可读性。

replace方法只是将一个子字符串替换为另一个子字符串。

Replaces each substring of this string that matches the literal target sequence with the specified literal replacement sequence. The replacement proceeds from the beginning of the string to the end, for example, replacing "aa" with "b" in the string "aaa" will result in "ba" rather than "ab".