add session struct

src/main/java/cn/quantgroup/xyqb/model/session/SessionStruct.java

+package cn.quantgroup.xyqb.model.session;
+
+import cn.quantgroup.xyqb.entity.User;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.sql.Timestamp;
+import java.util.Map;
+
+/**
+ * Created by 11 on 2016/12/28.
+ */
+@Data
+@NoArgsConstructor
+public class SessionStruct {
+    private String sid;
+    private SessionValue values;
+
+    @Data
+    @NoArgsConstructor
+    class SessionValue{
+        private User user;
+        private Map<String, Object> vals;
+        private Timestamp createAt;
+        private Timestamp lastAccessTime;
+    }
+}