Java Map Replace replaceQueryParameterInUrl(String fullUrl, Map newParameter)

Description

Replaces query parameters found in a URL string with specified parameters.

License

Open Source License

Parameter

Parameter	Description
fullUrl	the URL including any old query parameters
newParameter	the new parameters to put in the URL, replacing any existing one if it was already found in the URL

Return

the URL including any previous query parameters and new ones overwriting existing ones

Declaration

public static String replaceQueryParameterInUrl(String fullUrl, Map<String, String> newParameter) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

public class Main {
    /**//from w w w  . jav a  2 s.c  om
     * Replaces query parameters found in a URL string with specified
     * parameters.
     * 
     * @param fullUrl
     *            the URL including any old query parameters
     * @param newParameter
     *            the new parameters to put in the URL, replacing any existing
     *            one if it was already found in the URL
     * @return the URL including any previous query parameters and new ones
     *         overwriting existing ones
     */
    public static String replaceQueryParameterInUrl(String fullUrl, Map<String, String> newParameter) {
        Map<String, String> parameter = urlToQueryParameterMap(fullUrl);
        parameter.putAll(newParameter);
        String url = splitUrlParameter(fullUrl)[0];
        return addQueryParameterToUrl(url, parameter);
    }

    /**
     * Extracts any query parameters from a URL.
     * 
     * @param url
     *            the URL to work on
     * @return a key:value mapping of any query parameters found in the URL
     */
    public static Map<String, String> urlToQueryParameterMap(String url) {
        Map<String, String> paramMap = new HashMap<String, String>();
        String query = splitUrlParameter(url)[1];
        query = query.replace("&amp;", "&");
        String[] params = query.split("&");
        for (String param : params) {
            int equalsPos = param.indexOf("=");
            String key = equalsPos == -1 ? param : param.substring(0, equalsPos);
            String value = equalsPos == -1 ? "" : param.substring(equalsPos + 1);
            paramMap.put(key, value);
        }
        return paramMap;
    }

    /**
     * Splits a URL into the path and any query parameters.
     * 
     * @param fullUrl
     *            the URL to split
     * @return an array of {path, query}
     */
    public static String[] splitUrlParameter(String fullUrl) {
        int queryStart = fullUrl.indexOf("?");
        String url = queryStart == -1 ? fullUrl : fullUrl.substring(0, queryStart);
        String query = queryStart == -1 ? "" : fullUrl.substring(queryStart + 1);
        return new String[] { url, query };
    }

    /**
     * Adds query parameters to an URL.
     * 
     * @param url
     *            the URL to append the query parameters to
     * @param parameter
     *            a map of key-value pairs that are appended as "key=value"
     * @return the URL and appended parameters
     */
    public static String addQueryParameterToUrl(String url, Map<String, String> parameter) {
        if (parameter.size() == 0)
            return url;

        boolean first = true;
        for (Entry<String, String> entry : parameter.entrySet()) {

            url += (first) ? "?" : "&";
            url += entry.getKey() + "=" + entry.getValue();

            first = false;
        }

        return url;
    }
}

Related

1. replaceParameters(String str, Map parameters)
2. replaceParams(String str, Map map)
3. replacePlaceholders(String script, Map configurations)
4. replacePlaceholders(String string, Map values)
5. replaceProperties(final CharSequence string, final Map properties)
6. replaceSeparator(String value, String separator, Map map)
7. replaceString(Map bodyToReplace, String replacingContent)
8. replaceString(String source, Map args)
9. replaceString(String uri, String baseURI, Map prefixes)