Java Regex String Replace replace(String source, String prefix, String suffix, String prefixReplace, String suffixReplace)

Description

replace

License

Apache License

Declaration

public static String replace(String source, String prefix, String suffix, String prefixReplace,
            String suffixReplace) 

Method Source Code

//package com.java2s;
/*/*from   ww  w .j a v a  2  s .  c o m*/
 * Copyright 2002-2015 the original author or authors.
 *
 * Licensed 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.
 */

import java.util.regex.Pattern;

public class Main {
    private static final String chinesePattern = "[\u4e00-\u9fa5]{1,1}";

    public static String replace(String source, String prefix, String suffix, String prefixReplace,
            String suffixReplace) {
        char[] chars = source.toCharArray();
        char[] prefixChars = prefix.toCharArray();
        char[] suffixChars = suffix.toCharArray();
        StringBuffer result = new StringBuffer();
        int index = 0;
        boolean findPrefix = false;
        boolean findSuffix = false;
        int prefixIndex = -1;
        int suffixIndex = -1;
        out: for (int i = 0; i < chars.length; i++) {
            if ((i + prefixChars.length - 1) < chars.length) {
                for (int j = 0; j < prefixChars.length; j++) {
                    if (chars[i + j] != prefixChars[j]) {
                        break;
                    }
                    if (j == prefixChars.length - 1) {
                        findPrefix = true;
                        prefixIndex = i;
                        i += prefixChars.length;
                        continue out;
                    }
                }
            }
            if ((i + suffixChars.length - 1) < chars.length) {
                for (int j = 0; j < suffixChars.length; j++) {
                    if (chars[i + j] != suffixChars[j]) {
                        break;
                    }
                    if (j == suffixChars.length - 1) {
                        findSuffix = true;
                        suffixIndex = i;
                        i += prefixChars.length;
                    }
                }
            }
            if (findPrefix && findSuffix) {
                result.append(source.substring(index, prefixIndex));
                result.append(prefixReplace);
                result.append(source.substring(prefixIndex + prefixChars.length, suffixIndex));
                result.append(suffixReplace);
                index = suffixIndex + suffixChars.length;
                findPrefix = false;
                findSuffix = false;
            }
        }
        if (index < source.length()) {
            result.append(source.substring(index, source.length()));
        }
        return result.toString();
    }

    public static String substring(String source, int length) {
        char[] chars = source.toCharArray();
        int realLength = length * 2;
        StringBuffer stringBuffer = new StringBuffer();
        for (int i = 0, len = 0; i < chars.length; i++) {
            if (Pattern.matches(chinesePattern, String.valueOf(chars[i]))) {
                len += 2;
            } else {
                len++;
            }
            if (len <= realLength) {
                stringBuffer.append(chars[i]);
            } else {
                break;
            }
        }
        return stringBuffer.toString();
    }
}

Related

1. replace(String original, CharSequence target, CharSequence replacement)
2. replace(String pattern, String replace, String s)
3. replace(String s, Pattern pattern, Function func)
4. replace(String s, Properties p)
5. replace(String s1, String s2, Pattern pattern)
6. replace(String source, String search, String replace)
7. replace(String source, String search, String replacement)
8. replace(String source, String[] patterns, String[] replacements)
9. replace(String str, String key, String value)