前端添加、删除文件和反馈提示改为服务器回调信息，去除无用文件，前端版本信息改为由服务器获取，后台可批量插入版本日志

src/main/java/com/fjy/spring/domain/TbVersion.java

@@ -0,0 +1,27 @@
+package com.fjy.spring.domain;
+
+import lombok.Data;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Data
+public class TbVersion {
+    @Id
+    @GeneratedValue
+    private Integer versionid;
+
+    private String date;
+
+    private String content;
+
+    private String version;
+
+    private String user;
+
+    public TbVersion() {
+        super();
+    }
+}