JavaScript equivalent to URLEncoder.encode("String", "UTF-8") of Java

Question

I want to encode a string to UTF-8 in JavaScript. In java we use URLEncoder.encode("String", "UTF-8") to achieve this.

I know we can use encodeURI or encodeURIComponent but it is producing different output than URLEncoder.encode

Can anyone please suggest any available JS method that can be used to achieve same output as URLEncoder.encode.

NOTE: Due to restrictions I cannot use jQuery.

Can you give an example where `encodeURIComponent` and `encodeURI` don't work properly? — thefourtheye, Oct 11 '14 at 07:06
Why there was a downvote it is really a very good question i am stuck in this same problem for last 5 days ?? — Sudhanshu Gaur, Jun 30 '16 at 16:56
An example where the output of encodeURIComponent and encodeURI don't match the URLEncoder.encode is the space character for example (one outputs `+`, the other two `%20%`). — Adonis K. Kakoulidis, Jul 14 '23 at 10:26

score 0 · Answer 1 · answered Oct 11 '14 at 07:13

I don't know if this javaURLEncode() function is a spot-on match for Java's URLEncoder.encode method, but it might be close to what you're looking for:

function javaURLEncode(str) {
  return encodeURI(str)
    .replace(/%20/g, "+")
    .replace(/!/g, "%21")
    .replace(/'/g, "%27")
    .replace(/\(/g, "%28")
    .replace(/\)/g, "%29")
    .replace(/~/g, "%7E");
}

var testString = "It's ~ (crazy)!";
var jsEscape = escape(testString);
var jsEncodeURI = encodeURI(testString);
var jsEncodeURIComponent = encodeURIComponent(testString);
var javaURLEncoder = javaURLEncode(testString);
alert("Original: " + testString + "\n" +
  "JS escape: " + jsEscape + "\n" +
  "JS encodeURI: " + jsEncodeURI + "\n" +
  "JS encodeURIComponent: " + jsEncodeURIComponent + "\n" +
  "Java URLEncoder.encode: " + javaURLEncoder);

score 0 · Answer 2 · answered Apr 19 '17 at 06:08

0

found one more character should be replaced .replace(/\$/g, "%24")

answered Apr 19 '17 at 06:08

Quimby

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JavaScript equivalent to URLEncoder.encode("String", "UTF-8") of Java

2 Answers2