Java URL Create buildURL(String host, String path, Map params)

Description

build URL

License

Open Source License

Parameter

Parameter	Description
path	a parameter

Exception

Parameter	Description
MalformedURLException	an exception

Declaration

public static URL buildURL(String host, String path, Map<String, Object> params) throws Exception 

Method Source Code

//package com.java2s;
/*/*from w ww  . ja v a  2  s. c  o  m*/
 *  Copyright (c) 2014 Michael Berkovich, http://tr8nhub.com All rights reserved.
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */

import java.net.URL;
import java.net.URLEncoder;

import java.util.Iterator;

import java.util.Map;

public class Main {
    /**
     *
     * @param path
     * @return
     * @throws MalformedURLException
     */
    public static URL buildURL(String host, String path, Map<String, Object> params) throws Exception {
        StringBuilder url = new StringBuilder();
        url.append(host);
        if (!host.endsWith("/") && !path.startsWith("/"))
            url.append("/");
        url.append(path);

        if (params != null && params.keySet().size() > 0) {
            url.append("?");
            url.append(buildQueryString(params));
        }
        return new URL(url.toString());
    }

    /**
     * Builds a URL
     * @param host
     * @param path
     * @return
     * @throws MalformedURLException
     */
    public static URL buildURL(String host, String path) throws Exception {
        return buildURL(host, path, null);
    }

    /**
     * Creates a query string out of parameters map
     * @param params
     * @return
     */
    public static String buildQueryString(Map<String, Object> params) throws Exception {
        StringBuilder sb = new StringBuilder();
        Iterator<Map.Entry<String, Object>> entries = params.entrySet().iterator();
        while (entries.hasNext()) {
            Map.Entry<String, Object> e = entries.next();
            if (sb.length() > 0) {
                sb.append('&');
            }
            sb.append(URLEncoder.encode((String) e.getKey(), "UTF-8")).append('=')
                    .append(URLEncoder.encode((String) e.getValue(), "UTF-8"));
        }
        return sb.toString();
    }
}

Related

1. buildUrl(String baseUrl, Map queryParams, String anchor)
2. buildUrl(String context, String... relocations)
3. buildUrl(String context, String... relocations)
4. buildUrl(String host, int port, String path, Map parameters)
5. buildUrl(String host, int port, String path, Map parameters)
6. buildURL(String id)
7. buildUrl(String repositoryUrl, String resourceUrl)
8. buildURL(String spec)
9. buildURL(String spec)