JDBC Operations Database

1. Overview

2. JDBC

3. Project Reference JAR Package

Note: Reverse closing of resources in finally

Rs.close ();

Stmt.close ();

Conn.close ();

4. Create configuration file to read database information

The Load method IO operation consumes resources, so the creation tool class encapsulates the read properties file, uses singleton mode, controls how many instances of the tool class are generated, and promotes program performance.

(The private constructor method, and the property file is read in the method; Create GetInstance method limit the number of objects, only one)

JDBC Operations Database