当JVM启动时，它寻找给定名称的类缓存(如果没有提供名称，那么选择一个默认名称)，并按照需要连接现有的缓存或创建一个新的缓存。
When the JVM starts up, it looks for a class cache of the name given (if no name is provided, it chooses a default name) and it either connects to an existing cache or creates a new one, as required.
如果PETER没有显式地指定模式，那么就会创建表PETER . TABLEA，因为在默认情况下使用连接id。
If PETER had not explicitly indicated the schema, then the table PETER.TABLEA would have been created, because the connection ID is used by default.
默认情况下，没有设置该关键字，这意味着如果目标数据库支持Unicode,DB 2CLI应用程序就将使用Unicode进行连接。
By default, this keyword is not set, which means that the DB2 CLI application will connect using Unicode if the target database supports Unicode.
不过，如果没有providerURL，那么它将连接到localhost的900端口(或者您的上下文工厂的其他默认端口)。
However, without the provider URL it will simply connect to localhost at port 900 (or whatever the default port number for your context factory is).
不过，如果没有providerURL，那么它将连接到localhost的900端口(或者您的上下文工厂的其他默认端口)。
However, without the provider URL it will simply connect to localhost at port 900 (or whatever the default port number for your context factory is).
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