Escape XML special characters for attribute values. - Java XML

Java examples for XML:XML String Escape

  1. HOME
  2. Java
  3. XML
  4. XML String Escape

Description

Escape XML special characters for attribute values.

Demo Code


//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String text = "java2s.com";
        System.out.println(escapeAttr(text));
    }/*from   w  w w  .  ja v  a2  s .c o  m*/

    /** Escape XML special characters for attribute values.
        This assumes that the attribute will be quotes with ", it does
        not escape '. Also strips invalid XML characters. */
    public static String escapeAttr(String text) {
        int len = text.length();
        StringBuilder result = new StringBuilder(len);
        for (int i = 0; i < len; ++i) {
            char c = text.charAt(i);
            if (isInvalidXml(c))
                continue;
            switch (c) {
            case '>':
                result.append("&gt;");
                break;
            case '<':
                result.append("&lt;");
                break;
            case '&':
                result.append("&amp;");
                break;
            case '"':
                result.append("&quot;");
                break;
            default:
                result.append(c);
            }
        }
        return result.toString();
    }

    /** See http://www.w3.org/TR/2000/REC-xml-20001006#NT-Char */
    private static boolean isInvalidXml(char c) {
        return !(c == 0x9 || c == 0xA || c == 0xD
                || (c >= 0x20 && c <= 0xD7FF)
                || (c >= 0xE000 && c <= 0xFFFD) || (c >= 0x10000 && c <= 0x10FFFF));
    }
}

Related Tutorials