initialcontext java,独立Java程序中的Initialcontext

I’m using a JNDI for creating tomcat connection pool. It works great in a web application. I believe the InitialContext is provided by the tomcat server.

Context initContext = new InitialContext();

Context envContext = (Context)initContext.lookup(“java:/comp/env”);

dataSource = (DataSource)envContext.lookup(“jdbc/testdb”);

But when I try to call the same utility from a standalone Java program, the initContext object is null. How can I explicitly provide all the necessary properties that Context object is expecting.

Error : javax.naming.NoInitialContextException: Need to specify class

name in environment or system property, or as an applet parameter, or

in an application resource file: java.naming.factory.initial

解决方案

You could also create your own custom context.

LocalContext ctx = LocalContextFactory.createLocalContext();

ctx.addDataSource(“jdbc/testdb”, driverName, url, usr, pwd);

UPDATE

Setup:

SimpleNamingContextBuilder builder = new SimpleNamingContextBuilder();

builder.bind(“jdbc/Oracle”, ods);

builder.activate();

Use:

DataSource ds = InitialContext.doLookup(“jdbc/Oracle”);