添加换取二维码图片url地址的重构方法（可以选择是否生成压缩的网址）

Author: binarywang

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

@@ -511,6 +511,17 @@ public interface WxMpService {
    */
   public File qrCodePicture(WxMpQrCodeTicket ticket) throws WxErrorException;
 
+  /**
+   * <pre>
+   * 换取二维码图片url地址（可以选择是否生成压缩的网址）
+   * 详情请见: <a href="http://mp.weixin.qq.com/wiki/18/167e7d94df85d8389df6c94a7a8f78ba.html">生成带参数的二维码</a>
+   * </pre>
+   * @param ticket    二维码ticket
+   * @param needShortUrl 是否需要压缩的二维码地址
+   * @return
+   * @throws WxErrorException
+   */
+  public String qrCodePictureUrl(String ticket, boolean needShortUrl) throws WxErrorException;
   /**
    * <pre>
    * 换取二维码图片url地址

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

@@ -519,17 +519,27 @@ public File qrCodePicture(WxMpQrCodeTicket ticket) throws WxErrorException {
   }
 
   @Override
-  public String qrCodePictureUrl(String ticket) throws WxErrorException {
+  public String qrCodePictureUrl(String ticket, boolean needShortUrl) throws WxErrorException {
     String url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=%s";
     try {
-      return this.shortUrl(String.format(url, 
-                            URLEncoder.encode(ticket, Charsets.UTF_8.name())));
+      String resultUrl = String.format(url, 
+          URLEncoder.encode(ticket, Charsets.UTF_8.name()));
+      if(needShortUrl){
+        return this.shortUrl(resultUrl);
+      }
+      
+      return resultUrl;
     } catch (UnsupportedEncodingException e) {
       WxError error = WxError.newBuilder().setErrorCode(-1)
             .setErrorMsg(e.getMessage()).build();
       throw new WxErrorException(error);
     }
   }
+  
+  @Override
+  public String qrCodePictureUrl(String ticket) throws WxErrorException {
+    return qrCodePictureUrl(ticket, false);
+  }
 
   @Override
   public String shortUrl(String long_url) throws WxErrorException {