java实现微信扫码支付功能

<dependency>

   <groupid>com.github.wxpay</groupid>

   <artifactid>wxpay-sdk</artifactid>

   <version> 0.0 . 3 </version>

</dependency>

package com.xx.wxpay;

import com.github.wxpay.sdk.wxpayconfig;

import org.springframework.beans.factory.annotation.value;

import org.springframework.stereotype.component;

import java.io.inputstream;

/**

  * 描述：微信支付配置信息

  *

  * @author ssl

  * @create 2018/04/24 19:25

  */

@component

public class wewxconfig implements wxpayconfig {

   @value ( "${wechat.public.appid}" )

   private string appid;

   @value ( "${wechat.merchant}" )

   private string mchid;

   @value ( "${wechat.public.apikey}" )

   private string apikey;

   /**

    * 公众账号id:微信支付分配的公众账号id（企业号corpid即为此appid）

    *

    * @return

    */

   @override

   public string getappid() {

     return appid;

   }

   /**

    * 商户号:微信支付分配的商户号

    *

    * @return

    */

   @override

   public string getmchid() {

     return mchid;

   }

   /**

    * @return

    */

   @override

   public string getkey() {

     return apikey;

   }

   @override

   public inputstream getcertstream() {

     return null ;

   }

   @override

   public int gethttpconnecttimeoutms() {

     return 0 ;

   }

   @override

   public int gethttpreadtimeoutms() {

     return 0 ;

   }

}

package com.xx.wxpay;

import com.alibaba.fastjson.jsonobject;

import com.github.wxpay.sdk.wxpay;

import com.google.common.collect.maps;

import com.xx.model.order;

import com.xx.model.product;

import org.slf4j.logger;

import org.slf4j.loggerfactory;

import org.springframework.beans.factory.annotation.autowired;

import org.springframework.beans.factory.annotation.value;

import org.springframework.stereotype.component;

import org.springframework.stereotype.service;

import java.text.messageformat;

import java.util.hashmap;

import java.util.map;

/**

  * 描述：

  *

  * @author ssl

  * @create 2018/04/24 20:15

  */

@service

public class wewxpayservice {

   protected logger logger = loggerfactory.getlogger( this .getclass());

   @value ( "${project.url}" )

   private string projecturl;

   @autowired

   private wewxconfig wewxconfig;

   /**

    * 统一下单

    *

    * @param product

    * @param order

    * @return

    */

   public map<string, string> unifiedorder(product product, order order) {

     map<string, string> data = maps.newhashmap();

     wxpay wxpay = new wxpay(wewxconfig);

     data.put( "body" , "xx-" + product.getname());

     data.put( "detail" , "详细信息" );

     data.put( "out_trade_no" , order.getorderno());

     data.put( "device_info" , "web" );

     data.put( "fee_type" , "cny" );

     data.put( "total_fee" , order.getamount() + "" );

     data.put( "spbill_create_ip" , "127.0.0.1" );

     data.put( "notify_url" , projecturl + "/base/order/notifyurl" );

     data.put( "trade_type" , "native" ); // 此处指定为扫码支付

     data.put( "product_id" , product.getid() + "" );

     try {

       map<string, string> resp = wxpay.unifiedorder(data);

       logger.debug(jsonobject.tojsonstring(resp));

       return resp;

     } catch (exception e) {

       e.printstacktrace();

     }

     return null ;

   }

   /**

    * 订单查询

    *

    * @param orderno:订单号

    * @return

    */

   public map<string, string> orderquery(string orderno) {

     map<string, string> reqdata = maps.newhashmap();

     reqdata.put( "out_trade_no" , orderno);

     wxpay wxpay = new wxpay(wewxconfig);

     try {

       map<string, string> resp = wxpay.orderquery(reqdata);

       logger.debug(jsonobject.tojsonstring(resp));

       return resp;

     } catch (exception e) {

       e.printstacktrace();

     }

     return null ;

   }

   public static string geturl() {

     wxpay wxpay = new wxpay( new wewxconfig());

     map<string, string> data = new hashmap<string, string>();

     data.put( "body" , "上屏名称" );

     data.put( "detail" , "商品详情" );

     data.put( "out_trade_no" , "2ab9071b06b9f739b950ddb41db2690d" );

     data.put( "device_info" , "" );

     data.put( "fee_type" , "cny" );

     data.put( "total_fee" , "1" );

     data.put( "spbill_create_ip" , "218.17.160.245" );

     data.put( "notify_url" , "http://www.example.com/wxpay/notify" );

     data.put( "trade_type" , "native" ); // 此处指定为扫码支付

     data.put( "product_id" , "12" );

     try {

       map<string, string> resp = wxpay.unifiedorder(data);

       system.out.println(resp);

     } catch (exception e) {

       e.printstacktrace();

     }

     return "" ;

   }

}

/** 向微信支付系统下单，并得到二维码返回给用户 */

map<string, string> resdata = wewxpayservice.unifiedorder(product, order);