这个JAR实用程序含有一个执行基于JPA 1.0的数据库交互的类，该数据库将用户从浏览器输入的数据写入数据库表。

This utility JAR contains a class that performs JPA 1.0 based interactions with a database that writes the data entered in a browser by the user to a database table.

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输入数据库的登录信息，如图14所示。

Enter the database login details, as shown in Figure 14.

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随着汽车清单数据库不断增长，用户可能更趋向于输入数据库已经存在的型号名称。

As the database of vehicle listings grows, the probability that a user might enter a model name that already exists in the database also increases.

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