fixed #39

weixin4j-base/src/main/java/com/foxinmy/weixin4j/model/MediaItem.java

@@ -29,6 +29,7 @@ public class MediaItem implements Serializable {
 	/**
 	 * 媒体素材名称
 	 */
+	@JSONField(name = "filename")
 	private String name;
 	/**
 	 * 媒体素材最后更新时间

weixin4j-base/src/main/java/com/foxinmy/weixin4j/model/MediaRecord.java

@@ -37,9 +37,8 @@ public class MediaRecord implements Serializable {
 	/**
 	 * 媒体信息
 	 */
-	@JSONField(name = "item")
+	@JSONField(name = "itemlist")
 	private List<MediaItem> items;
-
 	/**
 	 * 分页信息
 	 */

weixin4j-base/src/main/java/com/foxinmy/weixin4j/payment/WeixinPayProxy.java

@@ -47,8 +47,17 @@ import com.foxinmy.weixin4j.util.Weixin4jSettings;
  */
 public class WeixinPayProxy {
 
+	/**
+	 * 微信支付API:js支付、扫码支付等接口
+	 */
 	private final Pay3Api pay3Api;
+	/**
+	 * 代金券API
+	 */
 	private final CouponApi couponApi;
+	/**
+	 * 现金API
+	 */
 	private final CashApi cashApi;
 
 	private final Weixin4jSettings settings;