Java Regex String Replace replace(String source, String search, String replacement)

Description

replace

License

Open Source License

Declaration

public static String replace(String source, String search, String replacement) 

Method Source Code

//package com.java2s;
/*//from   ww  w . j  a  v  a2 s .  co m
 * $Id: StringUtilities.java,v 1.6 2004/11/03 17:25:52 edankert Exp $
 *
 * Copyright (C) 2002-2004, Cladonia Ltd. All rights reserved.
 *
 * This software is the proprietary information of Cladonia Ltd.  
 * Use is subject to license terms.
 */

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static String replace(String source, String search, String replacement) {
        System.out.println("replace( " + source + ", " + search + ", " + replacement + ")");
        String result = null;

        search = "\\Q" + prepareNonRegularExpression(search) + "\\E";
        replacement = prepareNonRegularExpressionReplacement(replacement);

        Pattern pattern = Pattern.compile(search, Pattern.CASE_INSENSITIVE);

        try {
            Matcher matcher = pattern.matcher(source);
            result = matcher.replaceAll(replacement);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return result;
    }

    public static String prepareNonRegularExpression(String regexp) {
        StringBuffer result = new StringBuffer(regexp);

        int index = result.indexOf("\\E");

        while (index != -1) {
            result.replace(index, index + 2, "\\E\\\\E\\Q");
            index = result.indexOf("\\E", index + 7);
        }

        // Last character is a '\', make sure to escape otherwise it will escape 
        // the \E and we don't see the end of the non-regular expression.
        if (result.charAt(result.length() - 1) == '\\') {
            result.append("E\\\\\\Q");
        }

        return result.toString();
    }

    public static String prepareNonRegularExpressionReplacement(String regexp) {
        StringBuffer result = new StringBuffer(regexp);

        int index = result.indexOf("\\");

        while (index != -1) {
            result.replace(index, index + 1, "\\\\");
            index = result.indexOf("\\", index + 2);
        }

        index = result.indexOf("$");

        while (index != -1) {
            result.replace(index, index + 1, "\\$");
            index = result.indexOf("$", index + 2);
        }

        //      // Last character is a '\', make sure to escape otherwise it will escape 
        //      // the \E and we don't see the end of the non-regular expression.
        //      if ( result.length() > 0 && result.charAt( result.length()-1) == '\\') {
        //         result.append( "E\\\\\\Q");
        //      }

        return result.toString();
    }
}

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4. replace(String source, String prefix, String suffix, String prefixReplace, String suffixReplace)
5. replace(String source, String search, String replace)
6. replace(String source, String[] patterns, String[] replacements)
7. replace(String str, String key, String value)
8. replace(String str, String replacement, Function func)
9. replace(String string, Pattern pattern, String replacement)