CODEWITHSUNDEEP
java
David Jimenez Clase
David Jimenez Clase

Reputation: 15

JavaScript unescape equivalent in Java

I want to find a substitute for javascript unescape in java

I have tried this and it has not worked for me

String cadena = "%u0032%u0038";
System.out.println(URLDecoder.decode(cadena, "UTF-8"));

Upvotes: 1

Views: 180

Answers (1)

Andreas
Andreas

Reputation: 159165

Implement the unescape() method yourself.

In Java 11+, you can do it like this:

public static String unescape(String s) {
    return Pattern.compile("%u([0-9A-Fa-f]{4})|%([0-9A-Fa-f]{2})").matcher(s).replaceAll(m ->
            Character.toString(Integer.parseInt(m.group(m.start(1) != -1 ? 1 : 2), 16)));
}

In earlier Java versions, use:

public static String unescape(String s) {
    StringBuffer buf = new StringBuffer();
    Matcher m = Pattern.compile("%u([0-9A-Fa-f]{4})|%([0-9A-Fa-f]{2})").matcher(s);
    while (m.find())
        m.appendReplacement(buf, new String(new int[] { Integer.parseInt(m.group(m.start(1) != -1 ? 1 : 2), 16) }, 0, 1));
    return m.appendTail(buf).toString();
}

Test

String cadena = "%u0032%u0038";
System.out.println(unescape(cadena));

Output

28

Upvotes: 2

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