Introduction of JDBC

JDBC： It is a technical specification java Connect to database
developer ： Use java Code to operate different databases , Very trouble ！
     Corresponding drivers are provided for different database manufacturers
    
JDBC Basic use of （ Is the interface specification provided , If you connect to a database , How about operating the database ？）：
    1） drive Jar package （ Database vendors provide ）
    2） Registration drive
    3） Get database connection object
    4） Get ready SQL sentence
    5） Get the execution object through the database connection object
    6） Through execution sql Statement and returns the result
    7） Release resources