<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 */@Componentpublic class WeWxConfig implements WXPayConfig {  @Value("${wechat.public.appid}")  private String appId;  @Value("${wechat.merchant}")  private String mchId;  @Value("${wechat.public.apikey}")  private String apiKey;   /**   * 公眾賬號ID:微信支付分配的公眾賬號ID（企業號corpid即為此appId）   *   * @return   */  @Override  public String getAppID() {    return appId;  }   /**   * 商戶號:微信支付分配的商戶號   *   * @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 */@Servicepublic class WeWxPayService {  protected Logger logger = LoggerFactory.getLogger(this.getClass());  @Value("${project.url}")  private String projectUrl;  @Autowired  private WeWxConfig weWxConfig;    /**   * 統一下單   *   * @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", "詳細信息");    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"); // 此處指定為掃碼支付    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;  }   /**   * 訂單查詢   *   * @param orderNo:訂單號   * @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", "上屏名稱");    data.put("detail", "商品詳情");    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"); // 此處指定為掃碼支付    data.put("product_id", "12");     try {      Map<String, String> resp = wxpay.unifiedOrder(data);      System.out.println(resp);    } catch (Exception e) {      e.printStackTrace();    }    return "";  }}

/** 向微信支付系統下單，并得到二維碼返回給用戶 */Map<String, String> resData = weWxPayService.unifiedOrder(product, order);