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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>注册数据源</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 3 页（共6 页）</nobr></font></td>
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<p>
这个示例使用 i-net 软件的第三方 <code>DataSource</code> 实现连接到一个 MS SQL Server 数据库。代码中的注释详细描述了注册（或初始化）JDBC 数据源的重点。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
// We need to import the actual DataSource implementation 

import com.inet.tds.TdsDataSource;

import java.util.Hashtable;
import javax.naming.*;
import javax.naming.directory.*;
import java.sql.* ;
import javax.sql.* ;

public class InitializeJNDI {

    // First we define the relevant parameters for this datasource

    private String serverName = "persistentjava.com";
    private int portNumber = 1433;

    private String login = "java";
    private String password = "sun";

    private String databaseName = "jdbc";

    // This is the name we will assign to our datasource. Because we are 
    // using the file system provider, our name follows the file system 
    // naming rules. The JNDI reserved subcontext for JDBC applications is 
    // jdbc, thus our name starts appropriately.

    private String filePath = "jdbc/pjtutorial";

    public InitializeJNDI() {

      // To pass in the necessary parameters, we need to create and then 
      // populate a Hashtable.

        Hashtable env = new Hashtable();
        env.put(
            Context.INITIAL_CONTEXT_FACTORY,
            "com.sun.jndi.fscontext.RefFSContextFactory");

        try {

            // Create the initial context

            Context ctx = new InitialContext(env);

            // Here we create the actual DataSource and then set the relevant 
            // parameters.

            TdsDataSource ds = new TdsDataSource();

            ds.setServerName(serverName);
            ds.setPortNumber(portNumber);
            ds.setDatabaseName(databaseName);
            ds.setUser(login);
            ds.setPassword(password);
            ds.setDescription("JDBC DataSource Connection");

            // Now we bind the DataSource object to the name we selected earlier.

            ctx.bind(filePath, ds);
            ctx.close();

        // Generic Exception handler, in practice, this would be replaced by an 
        // appropriate Exception handling hierarchy.

        } catch (Exception ex) {
            System.err.println("ERROR: " + ex.getMessage());
        }

    }

    public static void main(String args[]) {
        new InitializeJNDI();
    }
}
</code>
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