Escapes a XML string. - Java XML

Java examples for XML:XML String Escape

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Description

Escapes a XML string.

Demo Code

/* See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * Esri Inc. licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License./*ww  w.  j  a va 2 s.c o m*/
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String s = "java2s.com";
        System.out.println(escape(s));
    }

    /**
     * Escapes a string.
     * @param s the string
     * @return the escaped string
     */
    public static String escape(String s) {
        return escape(s, true);
    }

    /**
     * Escapes special xml characters within a string.
     * <br/> < > & " are escaped
     * <br/> ' is escaped if escapeApostrophe is supplied as true.
     * @param s the string to escape
     * @param escapeApostrophe if true apostrophes are escaped
     * @return the escaped string
     */
    private static String escape(String s, boolean escapeApostrophe) {
        if (s == null) {
            return null;
        } else if (s.length() == 0) {
            return s;
        } else {
            char c;
            String sApostrophe = "&apos;";
            if (!escapeApostrophe)
                sApostrophe = "'";
            StringBuilder sb = new StringBuilder(s.length() + 20);
            for (int i = 0; i < s.length(); i++) {
                c = s.charAt(i);
                if (c == '&')
                    sb.append("&amp;");
                else if (c == '<')
                    sb.append("&lt;");
                else if (c == '>')
                    sb.append("&gt;");
                else if (c == '\'')
                    sb.append(sApostrophe);
                else if (c == '"')
                    sb.append("&quot;");
                else
                    sb.append(c);
            }
            return sb.toString();
        }
    }
}

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