com.hn.pay.wxpay.utils.PaymentKit Maven / Gradle / Ivy

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package com.hn.pay.wxpay.utils;

import com.hn.pay.wxpay.WxPayApiConfigKit;
import org.apache.commons.codec.Charsets;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap;

/**
 * 微信支付的统一下单工具类
 */
public class PaymentKit {
	
	/**
	 * 组装签名的字段
	 * 
	 * @param params
	 *            参数
	 * @param urlEncoder
	 *            是否urlEncoder
	 * @return {String}
	 */
	public static String packageSign(Map params, boolean urlEncoder) {
		// 先将参数以其参数名的字典序升序进行排序
		TreeMap sortedParams = new TreeMap(params);
		// 遍历排序后的字典，将所有参数按"key=value"格式拼接在一起
		StringBuilder sb = new StringBuilder();
		boolean first = true;
		for (Entry param : sortedParams.entrySet()) {
			String value = param.getValue();
			if (StrKit.isBlank(value)) {
				continue;
			}
			if (first) {
				first = false;
			} else {
				sb.append("&");
			}
			sb.append(param.getKey()).append("=");
			if (urlEncoder) {
				try {
					value = urlEncode(value);
				} catch (UnsupportedEncodingException e) {
				}
			}
			sb.append(value);
		}
		return sb.toString();
	}

	/**
	 * urlEncode
	 * 
	 * @param src
	 *            微信参数
	 * @return String
	 * @throws UnsupportedEncodingException
	 *             编码错误
	 */
	public static String urlEncode(String src) throws UnsupportedEncodingException {
		return URLEncoder.encode(src, Charsets.UTF_8.name()).replace("+", "%20");
	}

	/**
	 * 生成签名
	 * 
	 * @param params
	 *            参数
	 * @param partnerKey
	 *            支付密钥
	 * @return {String}
	 * 
	 */
	public static String createSign(Map params, String partnerKey) {
		// 生成签名前先去除sign
		params.remove("sign");
		String stringA = packageSign(params, false);
		String stringSignTemp = stringA + "&key=" + partnerKey;
		return HashKit.md5(stringSignTemp).toUpperCase();
	}

	/**
	 * 支付异步通知时校验sign
	 * 
	 * @param params
	 *            参数
	 * @param paternerKey
	 *            支付密钥
	 * @return {boolean}
	 */
	public static boolean verifyNotify(Map params, String paternerKey) {
		String sign = params.get("sign");
		String localSign = PaymentKit.createSign(params, paternerKey);
		return sign.equals(localSign);
	}
	/**
	 * 预付订单再次签名
	 * @param prepay_id prepay_id
	 * @return map
	 */
	public static Map prepayIdCreateSign(String prepay_id) {
		Map packageParams = new HashMap();
		packageParams.put("appId", WxPayApiConfigKit.getWxPayApiConfig().getAppId());
		packageParams.put("timeStamp", String.valueOf(System.currentTimeMillis() / 1000));
		packageParams.put("nonceStr", String.valueOf(System.currentTimeMillis()));
		packageParams.put("package", "prepay_id=" + prepay_id);
		packageParams.put("signType", "MD5");
		String packageSign = PaymentKit.createSign(packageParams, WxPayApiConfigKit.getWxPayApiConfig().getPaternerKey());
		packageParams.put("paySign", packageSign);
		return packageParams;
	}
	
	
	/**
	 * 判断接口返回的code是否是SUCCESS
	 * @param return_code 接口返回的code
	 * @return {boolean}
	 */
	public static boolean codeIsOK(String return_code) {
		return StrKit.notBlank(return_code) && "SUCCESS".equals(return_code);
	}
	

	/**
	 * 微信下单map to xml
	 * 
	 * @param params 参数
	 * @return {String}
	 */
	public static String toXml(Map params) {
		StringBuilder xml = new StringBuilder();
		xml.append("");
		for (Entry entry : params.entrySet()) {
			String key = entry.getKey();
			String value = entry.getValue();
			// 略过空值
			if (StrKit.isBlank(value))
				continue;
			xml.append("<").append(key).append(">");
			xml.append(entry.getValue());
			xml.append("");
		}
		xml.append("");
		return xml.toString();
	}

	/**
	 * 针对支付的xml，没有嵌套节点的简单处理
	 * 
	 * @param xmlStr xml字符串
	 * @return map
	 */
	public static Map xmlToMap(String xmlStr) {
		XmlHelper xmlHelper = XmlHelper.of(xmlStr);
		return xmlHelper.toMap();
	}

}