替换包含“with \”的字符串？

Question

How can I replace string containing " with \\" ?

replace(""","\\"") is not working for me.

public static String replaceSpecialCharsForJson(String str){
    return str.replace("'","\'")
              .replace(":","\\:")
              .replace("\"","\"")
              .replace("\r", "\\r")
              .replace("\n", "\\n");
} 

Answer 1

You can try with:

replace("\"","\\\"")

Since both " and \\ are metacharacters , you have to escape them with \\

Answer 2

试试这个：

replace("\"","\\\"");

Answer 3

Every slash as part of a string needs to be escaped. So if you want a string to look like "\\\\" , your code will have to contain String s = "\\\\\\\\" . Ugly but true.

The same goes for any other special character that might be interpreted. Quotes and colons inclusive. This means " \\ " " will look like " \\\\ \\" " (Added spaces to make separate escapes more visible)

Answer 4

Use:

str.replace("\"","\\\"")

So you escape the backslash.

Answer 5

You want to

• replace " (properly escaped: \\" )
• with \\" (properly escaped: \\\\\\" ) .

The right call is:

replace("\"", "\\\"");

Answer 6

I tried this way. I don't know how much this helpful in your scenario

String oldStr = String.valueOf('"');
String newStr = File.separator.concat(String.valueOf('"'));     
System.out.println(oldStr.replace(String.valueOf('"'),newStr));