Java Deque Usage buildQueryString(final Map> params)

Description

build Query String

License

Open Source License

Declaration

public static String buildQueryString(final Map<String, Deque<String>> params) 

Method Source Code

//package com.java2s;
/*//  www  .ja v a  2  s  .  co  m
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.Deque;

import java.util.Map;

public class Main {
    public static String buildQueryString(final Map<String, Deque<String>> params) {
        StringBuilder sb = new StringBuilder();
        boolean first = true;
        for (Map.Entry<String, Deque<String>> entry : params.entrySet()) {
            if (entry.getValue().isEmpty()) {
                if (first) {
                    first = false;
                } else {
                    sb.append('&');
                }
                sb.append(entry.getKey());
                sb.append('=');
            } else {
                for (String val : entry.getValue()) {
                    if (first) {
                        first = false;
                    } else {
                        sb.append('&');
                    }
                    sb.append(entry.getKey());
                    sb.append('=');
                    sb.append(val);
                }
            }
        }
        return sb.toString();
    }
}

Related

1. addSegment(Deque outputBuffer, String nextSegment)
2. createEmptyDequeArray(int size)
3. emptyDeque()
4. getArrayDeque()
5. getLast(List list)