add session struct

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

@@ -4,6 +4,7 @@ import cn.quantgroup.xyqb.entity.User;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.io.Serializable;
 import java.sql.Timestamp;
 import java.util.Map;
 
@@ -12,16 +13,8 @@ import java.util.Map;
  */
 @Data
 @NoArgsConstructor
-public class SessionStruct {
+public class SessionStruct implements Serializable {
     private String sid;
     private SessionValue values;
 
-    @Data
-    @NoArgsConstructor
-    class SessionValue{
-        private User user;
-        private Map<String, Object> vals;
-        private Timestamp createAt;
-        private Timestamp lastAccessTime;
-    }
 }