Here you can find the source of generateQueryJson(Map
public static String generateQueryJson(Map<String, String> params)
//package com.java2s; import java.util.Map; import org.json.JSONObject; public class Main { public static String generateQueryJson(Map<String, String> params) { if (params == null || params.isEmpty()) return ""; JSONObject aJsonObject = new JSONObject(params); return aJsonObject.toString(); }/*w w w. j a va 2 s. c o m*/ }