add follow entity dao and xml

Helius

2020-07-29 76c24821c597984767760282301418f35f3cd9d3

 src/main/java/com/xcong/excoin/common/system/base/BaseEntity.java

@@ -28,4 +28,6 @@

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private Date updateTime;

    private Integer version;
}