Java URL Create buildUrl(final String baseUrl, final Map params, final String... parts)

Description

build Url

License

Apache License

Declaration

public static String buildUrl(final String baseUrl, final Map<String, String> params, final String... parts)
            throws MalformedURLException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2011 John Casey//  w w w . java  2  s.com
 * 
 * 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.net.MalformedURLException;
import java.net.URL;
import java.util.Map;

public class Main {
    public static String buildUrl(final String baseUrl, final String... parts) throws MalformedURLException {
        return buildUrl(baseUrl, null, parts);
    }

    public static String buildUrl(final String baseUrl, final Map<String, String> params, final String... parts)
            throws MalformedURLException {
        if (parts == null || parts.length < 1) {
            return baseUrl;
        }

        final StringBuilder urlBuilder = new StringBuilder();

        if (!parts[0].startsWith(baseUrl)) {
            urlBuilder.append(baseUrl);
        }

        for (String part : parts) {
            if (part.startsWith("/")) {
                part = part.substring(1);
            }

            if (urlBuilder.length() > 0 && urlBuilder.charAt(urlBuilder.length() - 1) != '/') {
                urlBuilder.append("/");
            }

            urlBuilder.append(part);
        }

        if (params != null && !params.isEmpty()) {
            urlBuilder.append("?");
            boolean first = true;
            for (final Map.Entry<String, String> param : params.entrySet()) {
                if (first) {
                    first = false;
                } else {
                    urlBuilder.append("&");
                }

                urlBuilder.append(param.getKey()).append("=").append(param.getValue());
            }
        }

        return new URL(urlBuilder.toString()).toExternalForm();
    }
}

Related

1. buildUrl(final String baseUrl, final String basePath, final String[] parts)
2. buildUrl(final String baseUrl, final String... parts)
3. buildUrl(final String domain, final String path)
4. buildUrl(String base, Map params)