Replaces a tag given by a tag name in an xml string. - Java XML

Java examples for XML:XML String

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Description

Replaces a tag given by a tag name in an xml string.

Demo Code


//package com.java2s;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] argv) throws Exception {
        String tagname = "java2s.com";
        String xmlstring = "java2s.com";
        System.out.println(removeTag(tagname, xmlstring));
    }//w w  w.  j av a  2  s. c  o m

    /**
     * A static threadsafe map which contains compiled Regex Patterns.
     */
    private static Map<String, Pattern> patterns = new ConcurrentHashMap<String, Pattern>();

    /**
     * Replaces a tag given by a tagname in an xmlstring.
     * 
     * @param tagname Name of the tag to be removed
     * @param xmlstring XmlString to be modified
     * @return modified XmlString
     */
    public static String removeTag(String tagname, String xmlstring) {
        if (!patterns.containsKey(tagname)) {
            String regex = "(\\<" + tagname + ">.+?\\</" + tagname + ">)";
            Pattern pattern = Pattern.compile(regex, Pattern.DOTALL
                    | Pattern.MULTILINE);
            patterns.put(tagname, pattern);
        }

        Matcher matcher = patterns.get(tagname).matcher(xmlstring);
        if (matcher.find()) {
            xmlstring = matcher.replaceAll("");
        }

        return xmlstring;
    }
}

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