QED数据库使用笔记之Developing With QED

最新推荐文章于 2026-01-09 14:20:30 发布

原创最新推荐文章于 2026-01-09 14:20:30 发布 · 679 阅读

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#数据库 #database #jdbc #parameters #interface #basic

本文介绍了如何使用JDBC连接数据库的几种方式，包括通过JDBCDriverManager接口直接获取JDBCConnection对象，以及创建新数据库的具体步骤。

Connecting to a database

In order to access a database, you need to obtain a JDBC Connection object. There are two basic ways to get a database connection:

Using the JDBC DriverManager interface, you can directly obtain a JDBC Connection, if you know:

The name of the JDBC Driver class (com.quadcap.jdbc.JdbcDriver)
The database URL (jdbc:qed:database-name)
Any connection parameters (see below)

For QED, you could obtain a database connection using code similar to the following:
//获得驱动,建立连接
Class.forName("com.quadcap.jdbc.JdbcDriver");
java.sql.Connection conn = 
    java.sql.DriverManager.getConnection("jdbc:qed:mydb");//mydb是要连接的数据库名称
	
or, to create a new database:
//创建一个新的数据库
Class.forName("com.quadcap.jdbc.JdbcDriver");
java.util.Properties p = new java.util.Properties();
p.setProperty("create", "true");
java.sql.Connection conn = 
    java.sql.DriverManager.getConnection("jdbc:qed:mynewdb", p);
	
another way to create a new database:
//另外一种创建数据库的方法
Class.forName("com.quadcap.jdbc.JdbcDriver");
java.sql.Connection conn = 
    java.sql.DriverManager.getConnection("jdbc:qed:mynewdb;create=true");
	