JNDI

package com.servlet.jndi;

import java.util.Properties;

package com.servlet.jndi;

import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;

 

public class Test1 {
		public static void main(String[] args)throws Exception {
			Properties  ps  = new Properties();
			ps.put(Context.INITIAL_CONTEXT_FACTORY,"org.apache.naming.java.javaURLContextFactory");
			Context cxt=new InitialContext(ps);
			cxt.bind("一号菜","aaa");
			cxt.bind("二号菜","bbb");
			cxt.bind("三号菜","ccc");
			
			Object o = cxt.lookup("二号菜");
			 System.out.println(o);
			
			NamingEnumeration ne = cxt.list("");
			while(ne.hasMoreElements()){			
				Object o1 = ne.next();
				System.out.println(o1);
			}
			
		}
}


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package com.servlet.jndi;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;

//2.使用fscontext.jar,providerutil.jar读取当前类的所有目录,再根据一个目录名
//，得到一个文件的内容
//  然后打印出来
public class Test2 {
	public static void main(String[] args)throws Exception {
		Properties ps=new Properties();
		ps.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.fscontext.FSContextFactory" );
		Context cxt=new InitialContext(ps);
		NamingEnumeration ne = cxt.list("");
		while(ne.hasMoreElements()){
			Object o  = ne.next();
			System.out.println(o);
			
		}
		
		File f = (File)cxt.lookup("G:/role.xml");
		FileReader fr = new FileReader(f);
		
		BufferedReader br = new BufferedReader(fr);
		
		String str  = br.readLine();
		
		while(str!=null){
			
			System.out.println(str);
			str = br.readLine();
		}
		br.close();
		fr.close(); 
 	
 	
	}
}


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package com.servlet.jndi;

import java.sql.Connection;
import java.sql.sqlException;

import org.apache.commons.dbcp.BasicDataSource;

public class Test3 {
	public static void main(String[] args) throws Exception {
		   BasicDataSource  dbs=new BasicDataSource();
		  
		   dbs.setDriverClassName("com.microsoft.sqlserver.jdbc.sqlServerDriver");
		   dbs.setUrl("jdbc:sqlserver://localhoat:1433;databasename=DbAjax");
		   dbs.setUsername("sa");
		   dbs.setPassword("123");
		   dbs.setinitialSize(300);
		   dbs.setMaxActive(500);
		   Connection con=dbs.getConnection();
		   System.out.println(con);
	}
}








======================================================================================
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="javax.naming.Context"%>
<%@page import="javax.naming.InitialContext"%>
<%@page import="javax.sql.DataSource"%>
<%@page import="java.sql.Connection"%>

<%

   Context cxt = new InitialContext();
   Context envCxt = (Context)cxt.lookup("java:comp/env");
   DataSource ds = (DataSource)envCxt.lookup("sql2005");
   Connection conn = ds.getConnection();
   System.out.println(conn);
   conn.close();
   %>