A result data acquiring centralized entity set value and, encapsulated object is returned;
2, the package tools JDBC
Whenever the time, such as reading the configuration file, the write static code block;
An exception is thrown to specify the method can throw, static code block abnormal only capture try catch;
Class loader two functions: Class file byte code is loaded into memory; src acquired file in the path;
2.1 Gets drive object
among them. A URL is a Uniform Resource path, to get the absolute path string type by getPath () method;
IO flow properties and binding ensemble used:
Reads the value in the configuration file:
2.2 Gets the connection object
2.3 Method release of resources
Third, the use of JDBC tools - Sign Case
