Java tutorial
//package com.java2s; import java.util.Map; public class Main { public static String getParams(Map<String, String> form) { StringBuffer params = new StringBuffer(); int i = 0; for (Map.Entry<String, String> entry : form.entrySet()) { if (i > 0) { params.append("&"); } params.append(entry.getKey()); params.append("="); params.append(entry.getValue()); i++; } return params.toString(); } }