微信支付

private static String Key = "192006250b4c09247ec02edce69f6a2d"; 
 
    /**
     * @param args
     */ 
    public static void main(String[] args) { 
        System.out.println(">>>模拟微信支付<<<"); 
        
        //微信api提供的参数 
        String appid = "wxd930ea5d5a258f4f"; 
        String mch_id = "10000100"; 
        String device_info = "1000"; 
        String body = "test"; 
        String nonce_str = "ibuaiVcKdpRxkhJA"; 
         
        SortedMap<Object,Object> parameters = new TreeMap<Object,Object>(); 
        parameters.put("appid", appid); 
        parameters.put("mch_id", mch_id); 
        parameters.put("device_info", device_info); 
        parameters.put("body", body); 
        parameters.put("nonce_str", nonce_str); 
         
        String characterEncoding = "UTF-8"; 
        String weixinApiSign = "9A0A8659F005D6984697E2CA0A9CF3B7"; 
        System.out.println("微信的签名是：" + weixinApiSign); 
        String mySign = createSign(characterEncoding,parameters); 
        System.out.println("我的签名是："+mySign); 
         
        if(weixinApiSign.equals(mySign)){ 
            System.out.println("恭喜你~"); 
        }else{ 
            System.out.println("注定了~"); 
        } 
         
        String userAgent = "Mozilla/5.0(iphone;CPU iphone OS 5_1_1 like Mac OS X) AppleWebKit/534.46(KHTML,like Geocko) Mobile/9B206 MicroMessenger/5.0"; 
         
        char agent = userAgent.charAt(userAgent.indexOf("MicroMessenger")+15); 
         
        System.out.println("微信的版本号："+new String(new char[]{agent})); 
    } 
 
    /**
     * 微信支付签名算法sign
     * @param characterEncoding
     * @param parameters
     * @return
     */ 
    @SuppressWarnings("unchecked") 
    public static String createSign(String characterEncoding,SortedMap<Object,Object> parameters){ 
        StringBuffer sb = new StringBuffer(); 
        Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序） 
        Iterator it = es.iterator(); 
        while(it.hasNext()) { 
            Map.Entry entry = (Map.Entry)it.next(); 
            String k = (String)entry.getKey(); 
            Object v = entry.getValue(); 
            if(null != v && !"".equals(v)  
                    && !"sign".equals(k) && !"key".equals(k)) { 
                sb.append(k + "=" + v + "&"); 
            } 
        } 
        sb.append("key=" + Key); 
        String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase(); 
        return sign; 
    }