Java正则表达式； 需要将\\'映射到''

Question

I'm trying to map the \\' to '' . That is, a string consisting of a backslash followed immediately by a single quote should be mapped to two single quotes.

I've tried using

string = string.replace("\'", "''")

but this also maps a single quote to two single quotes (ie, "'" to "''" ), which is incorrect for what I need. What am I doing wrong?

Answer 1

这里的反斜杠是一个转义字符，它将与'如果您要匹配\\'您需要\\\\'匹配：

string = string.replace("\\'", "''")

Answer 2

The "\\" needs to be escaped itself because it is a special character. "\\\\'", "''"