Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2010-2013 Geometer Plus <contact@geometerplus.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class Main {
    public static String appendParameter(String url, String name, String value) {
        if (name == null || value == null) {
            return url;
        }
        value = value.trim();
        if (value.length() == 0) {
            return url;
        }
        try {
            value = URLEncoder.encode(value, "utf-8");
        } catch (UnsupportedEncodingException e) {
        }
        int index = url.indexOf('?', url.lastIndexOf('/') + 1);
        char delimiter = (index == -1) ? '?' : '&';
        while (index != -1) {
            final int start = index + 1;
            final int eqIndex = url.indexOf('=', start);
            index = url.indexOf('&', start);
            if (eqIndex != -1 && url.substring(start, eqIndex).equals(name)) {
                final int end = (index != -1 ? index : url.length());
                if (url.substring(eqIndex + 1, end).equals(value)) {
                    return url;
                } else {
                    return new StringBuilder(url).replace(eqIndex + 1, end, value).toString();
                }
            }
        }
        return new StringBuilder(url).append(delimiter).append(name).append('=').append(value).toString();
    }
}