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微信支付MCH

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Yi Li edited this page Jan 12, 2017 · 10 revisions

###生成web js 微信支付请求json 数据

package weixin.popular.example;

import java.io.IOException;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import weixin.popular.api.PayMchAPI;
import weixin.popular.bean.paymch.Unifiedorder;
import weixin.popular.bean.paymch.UnifiedorderResult;
import weixin.popular.util.PayUtil;

/**
 * 生成WEB JS 支付请求json
 * @author LiYi
 *
 */
public class PayMchJsServlet extends HttpServlet{

	/**
	 *
	 */
	private static final long serialVersionUID = 1L;
	private String appid;			//appid
	private String mch_id;      	//微信支付商户号
	private String key;				//API密钥

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//payPackage 的商品信息,openid 可以通过sns,或事件获取。

		Unifiedorder unifiedorder = new Unifiedorder();
		unifiedorder.setAppid(appid);
		unifiedorder.setMch_id(mch_id);
		unifiedorder.setNonce_str(UUID.randomUUID().toString().toString().replace("-", ""));

                unifiedorder.setOpenid(wx_openid);
		unifiedorder.setBody("商品信息");
		unifiedorder.setOut_trade_no("123456");
		unifiedorder.setTotal_fee("1");//单位分
		unifiedorder.setSpbill_create_ip(request.getRemoteAddr());//IP
		unifiedorder.setNotify_url("http://mydomain.com/test/notify");
		unifiedorder.setTrade_type("JSAPI");//JSAPI，NATIVE，APP，WAP
                //统一下单，生成预支付订单
		UnifiedorderResult unifiedorderResult = PayMchAPI.payUnifiedorder(unifiedorder,key);

		//@since 2.8.5  API返回数据签名验证
		if(unifiedorderResult.getSign_status() !=null && unifiedorderResult.getSign_status()){
			String json = PayUtil.generateMchPayJsRequestJson(unifiedorderResult.getPrepay_id(), appid, key);
			
			//将json 传到jsp 页面
			request.setAttribute("json", json);
			//示例jsp
			request.getRequestDispatcher("pay_example.jsp").forward(request,response);
		}
	}


}

###jsp 页面发起js 支付请求

<%@ page language="java" contentType="text/html; charset=UTF-8"  pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>pay js example</title>
<script type="text/javascript">
//json 数据
var x_json = ${json};
function onBridgeReady(){
   WeixinJSBridge.invoke(
       'getBrandWCPayRequest', x_json ,
       function(res){     
           if(res.err_msg == "get_brand_wcpay_request：ok" ) {}     // 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回    ok，但并不保证它绝对可靠。 
       }
   ); 
}
if (typeof WeixinJSBridge == "undefined"){
   if( document.addEventListener ){
       document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
   }else if (document.attachEvent){
       document.attachEvent('WeixinJSBridgeReady', onBridgeReady); 
       document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
   }
}else{
   onBridgeReady();
}
</script>
</head>
<body>

</body>
</html>

###notify

package weixin.popular.example;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import weixin.popular.bean.paymch.MchBaseResult;
import weixin.popular.bean.paymch.MchPayNotify;
import weixin.popular.support.ExpireKey;
import weixin.popular.support.expirekey.DefaultExpireKey;
import weixin.popular.util.SignatureUtil;
import weixin.popular.util.StreamUtils;
import weixin.popular.util.XMLConverUtil;

/**
 * 支付回调通知
 * @author LiYi
 *
 */
public class PayMchNotifyServlet extends HttpServlet{

	/**
	 *
	 */
	private static final long serialVersionUID = 1L;
	private String key;	//mch key

	//重复通知过滤
    private static ExpireKey expireKey = new DefaultExpireKey();

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//获取请求数据
		String xmlData = StreamUtils.copyToString(request.getInputStream(), Charset.forName("utf-8"));
		//将XML转为MAP,确保所有字段都参与签名验证
		Map<String,String> mapData = XMLConverUtil.convertToMap(xmlData);
		//转换数据对象
		MchPayNotify payNotify = XMLConverUtil.convertToObject(MchPayNotify.class,xmlData);
		//已处理 去重
		if(expireKey.exists(payNotify.getTransaction_id())){
                        MchBaseResult baseResult = new MchBaseResult();
			baseResult.setReturn_code("SUCCESS");
			baseResult.setReturn_msg("OK");
			response.getOutputStream().write(XMLConverUtil.convertToXML(baseResult).getBytes());
			return;
		}
		//签名验证
		if(SignatureUtil.validateSign(mapData,key)){
                        //@since 2.8.5
		        payNotify.buildDynamicField(mapData);

			expireKey.add(payNotify.getTransaction_id());
			MchBaseResult baseResult = new MchBaseResult();
			baseResult.setReturn_code("SUCCESS");
			baseResult.setReturn_msg("OK");
			response.getOutputStream().write(XMLConverUtil.convertToXML(baseResult).getBytes());
		}else{
			MchBaseResult baseResult = new MchBaseResult();
			baseResult.setReturn_code("FAIL");
			baseResult.setReturn_msg("ERROR");
			response.getOutputStream().write(XMLConverUtil.convertToXML(baseResult).getBytes());
		}
	}

}

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