微信掃碼支付Demo（java）

第一步java

要掃碼，必需要先有碼。生成二維碼demoapi

String url = "weixin://wxpay/bizpayurl?sign="+er.getSign()+"&appid="+er.getAppid()+
			"&mch_id="+er.getMch_id()+"&product_id="+er.getProduct_id()+"&time_stamp="+er.getTime_stamp()+"&nonce_str="+er.getNonce_str();

第二步微信

設置掃碼後微信通知你的URLapp

第三步dom

建立編寫回調URL servletide

package com.yuwei.nativepay.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

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


import com.yuwei.nativepay.main.UnifiedOrderBean;
import com.yuwei.nativepay.sign.Signature;
import com.yuwei.nativepay.sign.XMLParser;
import com.yuwei.nativepay.util.Configure;
import com.yuwei.nativepay.util.HttpRequest;
import com.yuwei.nativepay.util.RequestUtil;
import com.yuwei.nativepay.util.Util;

public class NativeCallBackServlet extends HttpServlet{

	/**
	 * 
	 */
	private static final long serialVersionUID = 3358943773018523786L;

	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		
		
		PrintWriter pw = resp.getWriter();
		String retStr = new String(Util.readInput(req.getInputStream()),"utf-8");
		
		//掃碼返回XML demo
//		<xml><appid><![CDATA[wxe9fa16c146eXXXXX]]></appid>
//		<openid><![CDATA[oAjrAjrw81UZuAlM3F_03tmxeSG4]]></openid>
//		<mch_id><![CDATA[1269011111]]></mch_id>
//		<is_subscribe><![CDATA[Y]]></is_subscribe>
//		<nonce_str><![CDATA[KwRqjXOW7k0wOZvL]]></nonce_str>
//		<product_id><![CDATA[8888]]></product_id>
//		<sign><![CDATA[41F26B7F22C8625060ABC299EEA754D7]]></sign>
//		</xml>
		
		
		
		try {
			Map<String, Object> map = XMLParser.getMapFromXML(retStr);
			
			//outTradeNo 訂單號
			UnifiedOrderBean order = new UnifiedOrderBean(map.get("appid").toString(), map.get("mch_id").toString(), "測試1", RequestUtil.getRandomStringByLength(32), 
					null, "Ipad mini  16G  白色", "Ipad mini  16G  白色", "java demo", new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()), "CNY",
					1, "122.224.40.204", new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()), new SimpleDateFormat("yyyyMMddHHmmss").format(new Date(new Date().getTime()+1800000)), 
					"WXG", "http://????/wx_nativepay/native", "NATIVE", map.get("product_id").toString(), "no_credit", map.get("openid").toString());
			
			
			order.setSign(Signature.getSign(order));

			HttpRequest http = new HttpRequest();
			String retOrder = http.sendPost("https://api.mch.weixin.qq.com/pay/unifiedorder", order);
			
			//贊成訂單接口返回demo
//			<xml><return_code><![CDATA[SUCCESS]]></return_code>
//			<return_msg><![CDATA[OK]]></return_msg>
//			<appid><![CDATA[wxe9fa16c146eXXXXX]]></appid>
//			<mch_id><![CDATA[1269011111]]></mch_id>
//			<device_info><![CDATA[測試1]]></device_info>
//			<nonce_str><![CDATA[DwEgTeCXHq3z8VRX]]></nonce_str>
//			<sign><![CDATA[68F3113F0E246EED9CAA49E93ACAC79E]]></sign>
//			<result_code><![CDATA[SUCCESS]]></result_code>
//			<prepay_id><![CDATA[wx20160319131705668cacb34b0717748054]]></prepay_id>
//			<trade_type><![CDATA[NATIVE]]></trade_type>
//			<code_url><![CDATA[weixin://wxpay/bizpayurl?pr=mt8vqLq]]></code_url>此處的code_url模式二里面能夠直接展現給用戶進行掃碼支付，有效期2小時
//			</xml>
			
			Map<String, Object> mapOrder = XMLParser.getMapFromXML(retOrder);
			
			
			//返回return xml
			Map<String, Object> retNative = new HashMap<String, Object>();
			retNative.put("return_code", mapOrder.get("return_code"));
			retNative.put("return_msg", mapOrder.get("return_msg"));
			retNative.put("appid", mapOrder.get("appid"));
			retNative.put("mch_id", mapOrder.get("mch_id"));
			retNative.put("nonce_str", mapOrder.get("nonce_str"));
			retNative.put("prepay_id", mapOrder.get("prepay_id"));
			retNative.put("result_code", mapOrder.get("result_code"));
			retNative.put("sign", Signature.getSign(retNative));
			
			
			pw.print(XMLParser.getXMLFromMap(retNative));
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			pw.flush();
			pw.close();
		}
		
		
	}
	
	
}

一切OK，到此結束測試