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I'm working on a database project using Oracle Express Edition and using JDBC. I have an excel spreadsheet within the database that I am working with (editing, updating, etc.) I recently started reading about BLOBS, so I just have a general idea about what it is, but I would like to know if it's possible to use the BLOB library in my project in order to download the updated spreadsheet and save it to my computer. I need the updated files saved, and I would prefer if I did it by code. Is this possible, by importing the BLOB class into my project, and if so, how would I go about doing that?

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我假设您的问题与此类有关。

重要的是要注意 aBLOB是“二进制大对象”，它是一个数据库术语，用于描述将任意序列化数据存储到数据库中。此处的 Java 类允许您更轻松地访问和修改数据库中的此类对象。它不是指数据库本身 - 或您正在使用的类似电子表格。

您的一般问题（虽然非常广泛并且可能会被关闭）很容易回答；是的。但是你必须实现几个部分：

  • 下载电子表格
  • 将更新导入您的数据库

您引用的课程对后者有用，但可能对前者没有用。

于 2013-07-17T21:45:26.027 回答