Java tutorial
//package com.java2s; //License from project: Apache License import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.ArrayList; import java.util.Collections; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.Locale; import java.util.Map; public class Main { public static HashMap getSysParamMap(Map map) { HashMap hashmap = new HashMap(); HashMap hashmap1 = new HashMap(); hashmap.put(encodeStr("appid"), encodeStr("1uMqYWpHo3MoLH")); hashmap.put(encodeStr("callid"), encodeStr((new StringBuilder()).append("").append(generateCallId()).toString())); hashmap.put(encodeStr("v"), encodeStr("1.0")); hashmap.put(encodeStr("lang"), encodeStr(Locale.getDefault().getLanguage())); hashmap1.putAll(hashmap); if (map != null) { hashmap1.putAll(map); } hashmap.put("bd_sig", generateBgsid(hashmap1)); return hashmap; } public static String encodeStr(String s) { String s1; try { s1 = URLEncoder.encode(s, "UTF-8"); } catch (UnsupportedEncodingException unsupportedencodingexception) { unsupportedencodingexception.printStackTrace(); return null; } catch (Exception exception) { exception.printStackTrace(); return null; } return s1; } public static long generateCallId() { return (new Date()).getTime(); } public static String generateBgsid(HashMap hashmap) { StringBuffer stringbuffer = new StringBuffer(); ArrayList arraylist = new ArrayList(); for (Iterator iterator = hashmap.entrySet().iterator(); iterator.hasNext(); arraylist .add(((java.util.Map.Entry) iterator.next()).getKey())) { } Collections.sort(arraylist, String.CASE_INSENSITIVE_ORDER); for (Iterator iterator1 = arraylist.iterator(); iterator1.hasNext(); stringbuffer .append((String) hashmap.get((String) iterator1.next()))) { } stringbuffer.append("c18c24046606b2e084edd37f9fe9f94d"); return md5(stringbuffer.toString()); } public static String md5(String s) { byte abyte0[]; StringBuilder stringbuilder; int i; try { abyte0 = MessageDigest.getInstance("MD5").digest(s.getBytes("UTF-8")); } catch (NoSuchAlgorithmException nosuchalgorithmexception) { throw new RuntimeException("Huh, MD5 should be supported?", nosuchalgorithmexception); } catch (UnsupportedEncodingException unsupportedencodingexception) { throw new RuntimeException("Huh, UTF-8 should be supported?", unsupportedencodingexception); } stringbuilder = new StringBuilder(2 * abyte0.length); i = abyte0.length; for (int j = 0; j < i; j++) { byte byte0 = abyte0[j]; if ((byte0 & 0xff) < 16) { stringbuilder.append("0"); } stringbuilder.append(Integer.toHexString(byte0 & 0xff)); } return stringbuilder.toString(); } }