An SQL database and the JDBC API provide an easy way of storing information and quickly searching previously stored data.
SQL数据库和JDBC API提供了一种轻松的方法用于存储信息和快速搜索先前存储的数据。
In response to determining that the received data identifier and the previously stored data identifier do not match, it is determined that the content of the object has changed.
和响应于确定所接收到的数据标识符和之前所存储的数据标识符不匹配，确定对象的内容已经改变。
That data might be previously cached content, or locally stored data in the form of XML or other file formats.
这些数据可以是之前缓存好的内容，也可以是以XML或其他文件格式存储的数据。
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