Convert International String to \u Codes in java

Question

How can I convert an international (e.g. Russian) String to \\u numbers (unicode numbers)
e.g. \\u041e\\u041a for OK ?

Answer 1

this type name is Decode/Unescape Unicode. this site link online convertor.

Answer 2

You could use escapeJavaStyleString from org.apache.commons.lang.StringEscapeUtils.

Answer 3

In case you need this to write a .properties file you can just add the Strings into a Properties object and then save it to a file. It will take care for the conversion.

Answer 4

I also had this problem. I had some Portuguese text with some special characters, but these characters where already in unicode format (ex.: \u00e3).

So I want to convert S\u00e3o to São.

I did it using the apache commons StringEscapeUtils. As @sorin-sbarnea said. Can be downloaded here.

Use the method unescapeJava, like this:

String text = "S\u00e3o"
text = StringEscapeUtils.unescapeJava(text);
System.out.println("text " + text);

(There is also the method escapeJava, but this one puts the unicode characters in the string.)

If any one knows a solution on pure Java, please tell us.

Answer 5

Just some basic Methods for that (inspired from native2ascii tool):

/**
 * Encode a String like äöü to \u00e4\u00f6\u00fc
 * 
 * @param text
 * @return
 */
public String native2ascii(String text) {
    if (text == null)
        return text;
    StringBuilder sb = new StringBuilder();
    for (char ch : text.toCharArray()) {
        sb.append(native2ascii(ch));
    }
    return sb.toString();
}

/**
 * Encode a Character like ä to \u00e4
 * 
 * @param ch
 * @return
 */
public String native2ascii(char ch) {
    if (ch > '\u007f') {
        StringBuilder sb = new StringBuilder();
        // write \uffffdd
        sb.append("\\u");
        StringBuffer hex = new StringBuffer(Integer.toHexString(ch));
        hex.reverse();
        int length = 4 - hex.length();
        for (int j = 0; j < length; j++) {
            hex.append('0');
        }
        for (int j = 0; j < 4; j++) {
            sb.append(hex.charAt(3 - j));
        }
        return sb.toString();
    } else {
        return Character.toString(ch);
    }
}

Answer 6

Apache commons StringEscapeUtils.escapeEcmaScript(String) returns a string with unicode characters escaped using the \u notation.

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