Java URL Encode encodeURLComponent(final String s)

Description

encode URL Component

License

Open Source License

Declaration

public static String encodeURLComponent(final String s) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.UnsupportedEncodingException;

import java.util.Locale;

public class Main {
    public static String encodeURLComponent(final String s) {
        if (s == null) {
            return "";
        }//from   w w  w  . j a va 2  s  . c om

        final StringBuilder sb = new StringBuilder();

        try {
            for (int i = 0; i < s.length(); i++) {
                final char c = s.charAt(i);

                if (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z')) || ((c >= '0') && (c <= '9'))
                        || (c == '-') || (c == '.') || (c == '_') || (c == '~')) {
                    sb.append(c);
                } else {
                    final byte[] bytes = ("" + c).getBytes("UTF-8");

                    for (byte b : bytes) {
                        sb.append('%');

                        int upper = (((int) b) >> 4) & 0xf;
                        sb.append(Integer.toHexString(upper).toUpperCase(Locale.US));

                        int lower = ((int) b) & 0xf;
                        sb.append(Integer.toHexString(lower).toUpperCase(Locale.US));
                    }
                }
            }

            return sb.toString();
        } catch (UnsupportedEncodingException uee) {
            throw new RuntimeException("UTF-8 unsupported!?", uee);
        }
    }
}

Related

1. encodeURL(BitSet urlsafe, byte[] bytes)
2. encodeUrl(final String input)
3. encodeURL(String s)
4. encodeURL(String s)
5. encodeUrl(String url, String encoding)
6. encodeUrlPath(String pathSegment)
7. unpaddedBase64UrlEncoded(final String unencodedString)
8. uriDecode(String src)
9. uriDecode(String uri)