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微信支付MCH

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liyiorg edited this page Jul 30, 2015 · 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，总价可以通过前端传入

		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);

		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 pay(){
	WeixinJSBridge.invoke('getBrandWCPayRequest',x_json,function(res){
		if(res.err_msg == 'get_brand_wcpay_request:ok'){
			//支付成功，可以做跳转到支付成功的提示页面
		}else{
			//支付失败
			alert(res.err_msg);
		}
	});
}
</script>
</head>
<body>

</body>
</html>

###notify

package weixin.popular.example;

import java.io.IOException;

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

import weixin.popular.bean.paymch.MchNotifyXml;
import weixin.popular.bean.paymch.MchPayNotify;
import weixin.popular.util.ExpireSet;
import weixin.popular.util.SignatureUtil;
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  时效60秒
    private static ExpireSet<String> expireSet = new ExpireSet<String>(60);

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//获取请求数据
		MchPayNotify payNotify = XMLConverUtil.convertToObject(MchPayNotify.class,request.getInputStream());
		//已处理 去重
		if(expireSet.contains(payNotify.getTransaction_id())){
			return;
		}
		//签名验证
		if(SignatureUtil.validateAppSignature(payNotify,key)){
			expireSet.add(payNotify.getTransaction_id());
			MchNotifyXml baseResult = new MchNotifyXml();
			baseResult.setReturn_code("SUCCESS");
			baseResult.setReturn_msg("OK");
			response.getOutputStream().write(XMLConverUtil.convertToXML(baseResult).getBytes());
		}else{
			MchNotifyXml baseResult = new MchNotifyXml();
			baseResult.setReturn_code("FAIL");
			baseResult.setReturn_msg("ERROR");
			response.getOutputStream().write(XMLConverUtil.convertToXML(baseResult).getBytes());
		}
	}

}

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