helloservlet.java
来自「Java的面向对象数据库系统的源代码」· Java 代码 · 共 65 行
JAVA
65 行
// You can redistribute this software and/or modify it under the terms of// the Ozone Library License version 1 published by ozone-db.org.//// The original code and portions created by SMB are// Copyright (C) 1997-@year@ by Per Nyfelt. All rights reserved.//// $Id: OzoneServiceMBean.java,v 1.1 2002/09/09 13:59:26 per_nyfelt Exp $package web;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.*;import javax.naming.InitialContext;import db.Hello;import db.HelloImpl;import org.ozoneDB.OzoneInterface;public class HelloServlet extends HttpServlet { private OzoneInterface db; public Hello hello; public static final String OBJ_NAME = "hej"; public void init() throws ServletException { try { System.out.println("[HelloServlet] connecting to ozone..."); db = (OzoneInterface) new InitialContext().lookup(OzoneInterface.class.getName()); System.out.println("[HelloServlet] Connected!"); db.reloadClasses(); System.out.println("[HelloServlet] Classes reloaded"); hello = (Hello) db.objectForName(OBJ_NAME); if (hello == null) { System.out.println("Storing new Hello object"); hello = (Hello) db.createObject(HelloImpl.class.getName(), OzoneInterface.Public, OBJ_NAME); } else { System.out.println("Found existing Hello object"); } System.out.println("db.Hello has the following greeting: " + hello.getGreeting()); } catch (Exception e) { e.printStackTrace(); } } public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String message; try { hello = (Hello) db.objectForName("hej"); message = "<html> <head> </head> <body> " + hello.getGreeting() + "</body> </html>"; System.out.println("[HelloServlet] Successfully used object"); } catch (Exception e) { System.out.println("[HelloServlet] Can't connect to ozone." + e.toString()); e.printStackTrace(); message = "<html> <head> </head> <body> " + e.toString() + "</body> </html>"; } PrintWriter out = response.getWriter(); System.out.println("[HelloServlet] Sending the following resonse back to client: " + message); out.println(message); out.flush(); out.close(); }}⌨️ 快捷键说明
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