Improve prepay API to support all parameters.

Author: zxkane

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpService.java

@@ -671,33 +671,57 @@ public interface WxMpService {
    */
   void setMaxRetryTimes(int maxRetryTimes);
 
-    /**
-     * 统一下单(详见http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1)
-     * 在发起微信支付前，需要调用统一下单接口，获取"预支付交易会话标识"
-     * @param openId 支付人openId
-     * @param outTradeNo 商户端对应订单号
-     * @param amt 金额(单位元)
-     * @param body 商品描述
-     * @param tradeType 交易类型 JSAPI，NATIVE，APP，WAP
-     * @param ip 发起支付的客户端IP
-     * @param notifyUrl 通知地址
-     * @return
-     */
-    WxMpPrepayIdResult getPrepayId(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String notifyUrl);
+  /**
+   * 统一下单(详见http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1)
+   * 在发起微信支付前，需要调用统一下单接口，获取"预支付交易会话标识"
+   * @param openId 支付人openId
+   * @param outTradeNo 商户端对应订单号
+   * @param amt 金额(单位元)
+   * @param body 商品描述
+   * @param tradeType 交易类型 JSAPI，NATIVE，APP，WAP
+   * @param ip 发起支付的客户端IP
+   * @param notifyUrl 通知地址
+   * @return
+   * @deprecated Use me.chanjar.weixin.mp.api.WxMpService.getPrepayId(Map<String, String>) instead
+   */
+  @Deprecated
+  WxMpPrepayIdResult getPrepayId(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String notifyUrl);
 
-    /**
-     * 该接口调用“统一下单”接口，并拼装JSSDK发起支付请求需要的参数
-     * 详见http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html#.E5.8F.91.E8.B5.B7.E4.B8.80.E4.B8.AA.E5.BE.AE.E4.BF.A1.E6.94.AF.E4.BB.98.E8.AF.B7.E6.B1.82
-     * @param openId 支付人openId
-     * @param outTradeNo 商户端对应订单号
-     * @param amt 金额(单位元)
-     * @param body 商品描述
-     * @param tradeType 交易类型 JSAPI，NATIVE，APP，WAP
-     * @param ip 发起支付的客户端IP
-     * @param notifyUrl 通知地址
-     * @return
-     */
-    Map<String, String> getJSSDKPayInfo(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String notifyUrl);
+  /**
+   * 统一下单(详见http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1)
+   * 在发起微信支付前，需要调用统一下单接口，获取"预支付交易会话标识"
+   * 
+   * @param parameters
+   *            All required/optional parameters for weixin payment
+   * @return
+   * @throws IllegalArgumentException
+   */
+  WxMpPrepayIdResult getPrepayId(Map<String, String> parameters);
+
+  /**
+   * 该接口调用“统一下单”接口，并拼装JSSDK发起支付请求需要的参数
+   * 详见http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html#.E5.8F.91.E8.B5.B7.E4.B8.80.E4.B8.AA.E5.BE.AE.E4.BF.A1.E6.94.AF.E4.BB.98.E8.AF.B7.E6.B1.82
+   * @param parameters
+   *            the required or optional parameters
+   * @return
+   */
+  Map<String, String> getJSSDKPayInfo(Map<String, String> parameters);  	
+  	
+  /**
+   * 该接口调用“统一下单”接口，并拼装JSSDK发起支付请求需要的参数
+   * 详见http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html#.E5.8F.91.E8.B5.B7.E4.B8.80.E4.B8.AA.E5.BE.AE.E4.BF.A1.E6.94.AF.E4.BB.98.E8.AF.B7.E6.B1.82
+   * @param openId 支付人openId
+   * @param outTradeNo 商户端对应订单号
+   * @param amt 金额(单位元)
+   * @param body 商品描述
+   * @param tradeType 交易类型 JSAPI，NATIVE，APP，WAP
+   * @param ip 发起支付的客户端IP
+   * @param notifyUrl 通知地址
+   * @return
+   * @deprecated Use me.chanjar.weixin.mp.api.WxMpService.getJSSDKPayInfo(Map<String, String>) instead
+   */
+  @Deprecated
+  Map<String, String> getJSSDKPayInfo(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String notifyUrl);
 
     /**
      * 该接口提供所有微信支付订单的查询,当支付通知处理异常戒丢失的情冴,商户可以通过该接口查询订单支付状态。

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpServiceImpl.java

@@ -11,6 +11,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import java.util.SortedMap;
 import java.util.TreeMap;
 import java.util.UUID;
@@ -777,43 +778,45 @@ public void setMaxRetryTimes(int maxRetryTimes) {
 
   @Override
   public WxMpPrepayIdResult getPrepayId(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String callbackUrl) {
-    String nonce_str = System.currentTimeMillis() + "";
-
-    SortedMap<String, String> packageParams = new TreeMap<String, String>();
+    Map<String, String> packageParams = new HashMap<String, String>();
     packageParams.put("appid", wxMpConfigStorage.getAppId());
     packageParams.put("mch_id", wxMpConfigStorage.getPartnerId());
-    packageParams.put("nonce_str", nonce_str);
     packageParams.put("body", body);
     packageParams.put("out_trade_no", outTradeNo);
-
     packageParams.put("total_fee", (int) (amt * 100) + "");
     packageParams.put("spbill_create_ip", ip);
     packageParams.put("notify_url", callbackUrl);
     packageParams.put("trade_type", tradeType);
     packageParams.put("openid", openId);
 
+    return getPrepayId(packageParams);
+  }
+
+  public WxMpPrepayIdResult getPrepayId(final Map<String, String> parameters) {
+    String nonce_str = System.currentTimeMillis() + "";
+
+    final SortedMap<String, String> packageParams = new TreeMap<String, String>(parameters);
+    packageParams.put("appid", wxMpConfigStorage.getAppId());
+    packageParams.put("mch_id", wxMpConfigStorage.getPartnerId());
+    packageParams.put("nonce_str", nonce_str);
+    checkParameters(packageParams);
+
     String sign = WxCryptUtil.createSign(packageParams, wxMpConfigStorage.getPartnerKey());
-    String xml = "<xml>" +
-        "<appid>" + wxMpConfigStorage.getAppId() + "</appid>" +
-        "<mch_id>" + wxMpConfigStorage.getPartnerId() + "</mch_id>" +
-        "<nonce_str>" + nonce_str + "</nonce_str>" +
-        "<sign>" + sign + "</sign>" +
-        "<body><![CDATA[" + body + "]]></body>" +
-        "<out_trade_no>" + outTradeNo + "</out_trade_no>" +
-        "<total_fee>" + packageParams.get("total_fee") + "</total_fee>" +
-        "<spbill_create_ip>" + ip + "</spbill_create_ip>" +
-        "<notify_url>" + callbackUrl + "</notify_url>" +
-        "<trade_type>" + tradeType + "</trade_type>" +
-        "<openid>" + openId + "</openid>" +
-        "</xml>";
+    packageParams.put("sign", sign);
+
+    StringBuilder request = new StringBuilder("<xml>");
+    for (Entry<String, String> para : packageParams.entrySet()) {
+      request.append(String.format("<%s>%s</%s>", para.getKey(), para.getValue(), para.getKey()));
+    }
+    request.append("</xml>");
 
     HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/pay/unifiedorder");
     if (httpProxy != null) {
       RequestConfig config = RequestConfig.custom().setProxy(httpProxy).build();
       httpPost.setConfig(config);
     }
 
-    StringEntity entity = new StringEntity(xml, Consts.UTF_8);
+    StringEntity entity = new StringEntity(request.toString(), Consts.UTF_8);
     httpPost.setEntity(entity);
     try {
       CloseableHttpResponse response = getHttpclient().execute(httpPost);
@@ -828,9 +831,39 @@ public WxMpPrepayIdResult getPrepayId(String openId, String outTradeNo, double a
     return new WxMpPrepayIdResult();
   }
 
+  final String[] REQUIRED_ORDER_PARAMETERS = new String[] { "appid", "mch_id", "body", "out_trade_no", "total_fee", "spbill_create_ip", "notify_url",
+      "trade_type", };
+
+  private void checkParameters(Map<String, String> parameters) {
+    for (String para : REQUIRED_ORDER_PARAMETERS) {
+      if (!parameters.containsKey(para))
+        throw new IllegalArgumentException("Reqiured argument '" + para + "' is missing.");
+    }
+    if ("JSAPI".equals(parameters.get("trade_type")) && !parameters.containsKey("openid"))
+      throw new IllegalArgumentException("Reqiured argument 'openid' is missing when trade_type is 'JSAPI'.");
+    if ("NATIVE".equals(parameters.get("trade_type")) && !parameters.containsKey("product_id"))
+      throw new IllegalArgumentException("Reqiured argument 'product_id' is missing when trade_type is 'NATIVE'.");
+  }
+
   @Override
   public Map<String, String> getJSSDKPayInfo(String openId, String outTradeNo, double amt, String body, String tradeType, String ip, String callbackUrl) {
-    WxMpPrepayIdResult wxMpPrepayIdResult = getPrepayId(openId, outTradeNo, amt, body, tradeType, ip, callbackUrl);
+    Map<String, String> packageParams = new HashMap<String, String>();
+    packageParams.put("appid", wxMpConfigStorage.getAppId());
+    packageParams.put("mch_id", wxMpConfigStorage.getPartnerId());
+    packageParams.put("body", body);
+    packageParams.put("out_trade_no", outTradeNo);
+    packageParams.put("total_fee", (int) (amt * 100) + "");
+    packageParams.put("spbill_create_ip", ip);
+    packageParams.put("notify_url", callbackUrl);
+    packageParams.put("trade_type", tradeType);
+    packageParams.put("openid", openId);
+
+    return getJSSDKPayInfo(packageParams);
+  }
+
+  @Override
+  public Map<String, String> getJSSDKPayInfo(Map<String, String> parameters) {
+    WxMpPrepayIdResult wxMpPrepayIdResult = getPrepayId(parameters);
     String prepayId = wxMpPrepayIdResult.getPrepay_id();
     if (prepayId == null || prepayId.equals("")) {
       throw new RuntimeException("get prepayid error");

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/bean/result/WxMpPrepayIdResult.java

@@ -22,6 +22,9 @@ public class WxMpPrepayIdResult implements Serializable {
     private String result_code;
     private String prepay_id;
     private String trade_type;
+    private String err_code;
+    private String err_code_des;
+    private String code_url;
 
     public String getReturn_code() {
         return return_code;
@@ -94,4 +97,28 @@ public String getTrade_type() {
     public void setTrade_type(String trade_type) {
         this.trade_type = trade_type;
     }
+    
+    public String getErr_code() {
+      return err_code;
+    }
+
+    public void setErr_code(String err_code) {
+      this.err_code = err_code;
+    }
+
+    public String getErr_code_des() {
+      return err_code_des;
+    }
+
+    public void setErr_code_des(String err_code_des) {
+      this.err_code_des = err_code_des;
+    }
+
+    public String getCode_url() {
+      return code_url;
+    }
+
+    public void setCode_url(String code_url) {
+      this.code_url = code_url;
+    }
 }