JNDI 初学 NoInitialContextException

boxiuzhen 2009-07-17 01:06:36

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.util.Hashtable;



import javax.naming.Context;

import javax.naming.InitialContext;

import javax.sql.DataSource;



public class JndiLookUp {

	public static void main(String[] args) {

		Context ctx = null;

		Connection con = null;

		PreparedStatement ps = null;

		ResultSet rs = null;

		try {

			// 1.连接jndi服务器

			Hashtable<String, String> env = new Hashtable<String, String>();

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

			env.put(Context.PROVIDER_URL, "file:c:/jdbc");

			ctx = new InitialContext();



			DataSource ds = (DataSource) ctx.lookup("ora20");

			con = ds.getConnection();

			ps = con.prepareStatement("select * from m_users");

			ps.executeQuery();

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

}

我已经加了ojdbc14.jar,fscontext.jar和providerutil.jar
为什么上面的代码执行完后,会出现下面的异常

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
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:325)
at javax.naming.InitialContext.bind(InitialContext.java:400)
at JndiBind.main(JndiBind.java:29)

...全文

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xinglongjian 2009-07-19

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顶一下，学习了。

humanity 2009-07-17

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^_^ 确实是简单错误。

jww_in_windows 2009-07-17

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[Quote=引用楼主 boxiuzhen 的帖子:]
Java codeimport java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;

public class JndiLookUp {
public static void main(String[] args) {
Context ctx = null;
Connection con = null;
PreparedStatement ps = n…
[/Quote]
怎么解觉的?
另外你代码context, connection, statement ,resultset 为什么都没关闭
try {
} catch(..) {
} finally {
if (ctx != null) {
ctx.close();
}
if (rs != null) {
rs.close();
}
...ps.close(), con.close()
}