支付宝支付回调代码（验签，订单状态，金额，appid等校验），支付， 提现相关demo

1.支付回调，注意金额  用字符串，否则容易失真，验证失败

	@RequestMapping("/callBack")
	public JSONMessage payCheck(HttpServletRequest request, HttpServletResponse response){
        
		Map<String,String> params = new HashMap<String,String>();
		Map requestParams = request.getParameterMap();
        //获取回调参数转为map集合
		for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {
		    String name = (String) iter.next();
		    String[] values = (String[]) requestParams.get(name);
		    String valueStr = "";
		    for (int i = 0; i < values.length; i++) {
		        valueStr = (i == values.length - 1) ? valueStr + values[i]
		                    : valueStr + values[i] + ",";
		  	}
		    //乱码解决，这段代码在出现乱码时使用。
			//valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
			params.put(name, valueS