JAVA微信公衆号微信支付

java 微信公衆号微信支付

微信支付開發

一、引入需要的庫

首先引入github 微信支付和公衆号支援庫

<dependency>
        <groupId>com.github.binarywang</groupId>
        <artifactId>weixin-java-mp</artifactId>
        <version>4.1.0</version>
    </dependency>

    <dependency>
        <groupId>com.github.binarywang</groupId>
        <artifactId>weixin-java-pay</artifactId>
        <version>4.1.0</version>
    </dependency>

第二步

配置

代碼如下（示例）：

#公衆号微信配置
application.wechat.mp.configs[0].appId=
application.wechat.mp.configs[0].secret=
application.wechat.mp.configs[0].token=
application.wechat.mp.configs[0].aesKey=
application.wechat.mp.useRedis=false
#公衆号微信支付配置
application.wechat.pay.appId=
application.wechat.pay.mchId=
application.wechat.pay.mchKey=
#keyPath p12證書的位置，可以指定絕對路徑，也可以指定類路徑（以classpath:開頭）
application.wechat.pay.keyPath=

二、配置微信參數

公衆号的自行找demo配置

import com.github.binarywang.wxpay.config.WxPayConfig;
import com.github.binarywang.wxpay.service.WxPayService;
import com.github.binarywang.wxpay.service.impl.WxPayServiceImpl;
import lombok.AllArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
* @author Binary Wang
*/
@Configuration
@ConditionalOnClass(WxPayService.class)
@EnableConfigurationProperties(WxPayProperties.class)
@AllArgsConstructor
public class WxPayConfiguration {
private WxPayProperties properties;

@Bean
@ConditionalOnMissingBean
public WxPayService wxService() {
WxPayConfig payConfig = new WxPayConfig();
payConfig.setAppId(StringUtils.trimToNull(this.properties.getAppId()));
payConfig.setMchId(StringUtils.trimToNull(this.properties.getMchId()));
payConfig.setMchKey(StringUtils.trimToNull(this.properties.getMchKey()));
payConfig.setSubAppId(StringUtils.trimToNull(this.properties.getSubAppId()));
payConfig.setSubMchId(StringUtils.trimToNull(this.properties.getSubMchId()));
payConfig.setKeyPath(StringUtils.trimToNull(this.properties.getKeyPath()));

// 可以指定是否使用沙箱環境
payConfig.setUseSandboxEnv(false);

WxPayService wxPayService = new WxPayServiceImpl();
wxPayService.setConfig(payConfig);
return wxPayService;
  }

}

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;

/**
* wxpay pay properties.
*
* @author Binary Wang
*/
@Data
@ConfigurationProperties(prefix = "application.wechat.pay")
public class WxPayProperties {
/**
* 設定微信公衆号或者小程式等的appid
*/
private String appId;

/**
* 微信支付商戶号
*/
private String mchId;

/**
* 微信支付商戶密鑰
*/
private String mchKey;

/**
* 服務商模式下的子商戶公衆賬号ID，普通模式請不要配置，請在配置檔案中将對應項删除
*/
private String subAppId;

/**
* 服務商模式下的子商戶号，普通模式請不要配置，最好是請在配置檔案中将對應項删除
*/
private String subMchId;

/**
* apiclient_cert.p12檔案的絕對路徑，或者如果放在項目中，請以classpath:開頭指定
*/
private String keyPath;

}

3前端調用預訂單擷取

背景統一下單擷取jsapi支付參數封裝一些必要參數

@ApiOperation(value = "原生的統一下單接口")
@PostMapping("/unifiedOrder")
public Result unifiedOrder(@RequestBody Object object) throws WxPayException {
WxPayUnifiedOrderRequest request = new WxPayUnifiedOrderRequest();
request.setDeviceInfo("WEB");
request.setOpenid("111111");//必須要
request.setSignType("MD5");
request.setBody("測試1"); //必填項 産品資訊
request.setFeeType("CNY");//必填項  預設cny
request.setTotalFee(1);//必填項 訂單總金額，機關為分，詳見支付金額
return payService.createOrder(request);
  }

service處理訂單資訊

import com.alibaba.fastjson.JSONObject;

import com.github.binarywang.wxpay.bean.request.WxPayUnifiedOrderRequest;
import com.github.binarywang.wxpay.bean.result.WxPayUnifiedOrderResult;
import com.github.binarywang.wxpay.exception.WxPayException;
import com.github.binarywang.wxpay.service.WxPayService;
import lombok.AllArgsConstructor;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;

@Service
@AllArgsConstructor
public class OrderService implements IOrderService {
private final static Log logger  = LogFactory.getLog(OrderService.class);

private WxPayService wxService;
private WxPayProperties wxPayProperties;
private SystemCfg systemCfg;



@Override
public Result createOrder(WxPayUnifiedOrderRequest request) throws WxPayException {
Result result = new Result();
//生成訂單号
request.setNotifyUrl("127.0.0.1/pay/notify/order"); //回調位址
request.setSpbillCreateIp("127.0.0.1");//伺服器ip 必填
request.setTradeType("JSAPI");   //必填JSAPI

WxPayUnifiedOrderResult wxResult =this.wxService.unifiedOrder(request);
logger.info("\n微信發起預訂單接收到請求消息，内容："+JsonUtils.toJson(wxResult));
if(wxResult.getReturnCode().equals("SUCCESS")){
//   wxOrder.add

signOrder(result, wxResult);
        }else {
result.setErrCode(1);
result.setErrMsg("微信發起訂單失敗");
        }
return result;
    }

/**
* 封裝微信預訂單生成成功後傳回的方法
* @param result
* @param wxResult
*/
private void signOrder(Result result, WxPayUnifiedOrderResult wxResult) {
//封裝JSAPI調起支付需要的參數
TreeMap<String, String> stringStringTreeMap = new TreeMap<>();
String timeStamp = getSecondTimestampTwo(new Date());
stringStringTreeMap.put("appId",wxResult.getAppid());
stringStringTreeMap.put("timeStamp",timeStamp);
stringStringTreeMap.put("nonceStr",wxResult.getNonceStr());
stringStringTreeMap.put("package","prepay_id="+wxResult.getPrepayId());
stringStringTreeMap.put("signType","MD5");
String sign = MD5Utils.encodeSign(stringStringTreeMap, wxPayProperties.getMchKey());

WxSignVo vo = new WxSignVo();
vo.setAppId(wxResult.getAppid());
vo.setTimeStamp(timeStamp);
vo.setNonceStr(wxResult.getNonceStr());
vo.setPrepay_id(wxResult.getPrepayId());
vo.setSignType("MD5");
vo.setPaySign(sign);
String encode="";
//這裡是我加密的可以不用
try {
encode = EncodeUtil.encryptDES(JSONObject.toJSONString(vo),"12345");
        } catch (Exception e) {
e.printStackTrace();
        }

result.setData(encode);
    }


/**
* 擷取精确到秒的時間戳
* @param date
* @return
*/
public static String getSecondTimestampTwo(Date date){
if (null == date) {
return "";
        }
String timestamp = String.valueOf(date.getTime()/1000);
return timestamp;
    }
}

這裡是需要用到的MD5UTILS

import org.apache.commons.lang3.StringUtils;

import java.security.MessageDigest;
import java.util.*;

public class MD5Utils {

/**
* sign 簽名 （參數名按ASCII碼從小到大排序（字典序）+key+MD5+轉大寫簽名）
* @param map
* @return
*/
public static String encodeSign(SortedMap<String,String> map, String key){
if(StringUtils.isEmpty(key)){
throw new RuntimeException("簽名key不能為空");
        }
Set<Map.Entry<String, String>> entries = map.entrySet();
Iterator<Map.Entry<String, String>> iterator = entries.iterator();
List<String> values =new ArrayList();

while(iterator.hasNext()){
Map.Entry entry = (Map.Entry) iterator.next();
String k = String.valueOf(entry.getKey());
String v = String.valueOf(entry.getValue());
if (StringUtils.isNotEmpty(v) && entry.getValue() !=null && !"sign".equals(k) && !"key".equals(k)) {
values.add(k + "=" + v);
            }
        }
values.add("key="+ key);
String sign = StringUtils.join(values, "&");
return encodeByMD5(sign).toUpperCase();
    }
/**
* 通過MD5加密
*
* @param algorithmStr
* @return String
*/
public static String encodeByMD5(String algorithmStr) {
if (algorithmStr==null) {
return null;
        }
try {
MessageDigest messageDigest = MessageDigest.getInstance("md5");
messageDigest.update(algorithmStr.getBytes("utf-8"));
return getFormattedText(messageDigest.digest());
        } catch (Exception e) {
throw new RuntimeException(e);
        }

    }

private static String getFormattedText(byte[] digest){
StringBuffer buffer = new StringBuffer();
//把每一個byte，做一個與運算，0xff
for (byte b :
digest) {
int number=b & 0xff;//加鹽
String str = Integer.toHexString(number);
if (str.length() == 1){
buffer.append("0");
            }
buffer.append(str);
        }
//标準的md5加密後的結果
return buffer.toString();
    }

public static void main(String[] args) {

TreeMap<String, String> stringStringTreeMap = new TreeMap<>();
stringStringTreeMap.put("appId","appId");
stringStringTreeMap.put("timeStamp","timeStamp");
stringStringTreeMap.put("nonceStr","nonceStr");
stringStringTreeMap.put("package","prepay_id=111");
stringStringTreeMap.put("signType","MD5");


String s = MD5Utils.encodeSign(stringStringTreeMap, "111");
System.out.println(s);
    }
}

附帶前端喚起支付的js

function onBridgeReady(){
WeixinJSBridge.invoke(
'getBrandWCPayRequest', {
"appId":"wx2421b1c4370ec43b",     //公衆号ID，由商戶傳入     
"timeStamp":"1395712654",         //時間戳，自1970年以來的秒數     
"nonceStr":"e61463f8efa94090b1f366cccfbbb444", //随機串     
"package":"prepay_id=u802345jgfjsdfgsdg888",     
"signType":"MD5",         //微信簽名方式：     
"paySign":"70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信簽名 
      },
function(res){
if(res.err_msg == "get_brand_wcpay_request:ok" ){
// 使用以上方式判斷前端傳回,微信團隊鄭重提示：
//res.err_msg将在使用者支付成功後傳回ok，但并不保證它絕對可靠。
      } 
   }); 
}
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();
}

總結

本文僅僅簡單介紹了微信喚起支付的使用回顯回調的話函數和方法自己出處理邏輯。

JAVA微信公衆号微信支付

3前端調用預訂單擷取

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