mainpage.java

来自「对初学者非常有用的,学习学习吧,简单的Java编程」· Java 代码 · 共 96 行

JAVA
96 行
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package com.city.oa.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.*;
import javax.servlet.http.*;


public class MainPage extends HttpServlet {

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		
		HttpSession session=request.getSession();
		String id=(String)session.getAttribute("id");
		ServletContext ctx=this.getServletContext();
		
		Integer num=(Integer)ctx.getAttribute("num");
		if(num==null)
		{
			num=0;
		}
		
		if(id!=null)
		{
			response.setContentType("text/html");
			response.setCharacterEncoding("GBK");
			PrintWriter out = response.getWriter();
			out
					.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
			out.println("<HTML>");
			out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
			out.println("  <BODY>");
			out.print(" <h1>管理主页</h1> ");
			out.print(" <h1>登陆人数"+num+"</h1> ");
			out.println("UserID:"+id+"<br/>");
			out.println("<a href='LogoutAction'>退出登陆</a><a href='login.jsp'>返回登陆</a>");
			out.println("  </BODY>");
			out.println("</HTML>");
			out.flush();
			out.close();
		}
		else
		{
			
		}
		
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request,response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}

mainpage.java - 源码说明

本页面展示了「对初学者非常有用的,学习学习吧,简单的Java编程」中的 mainpage.java 源码文件，采用 Java 编程语言编写，共 96 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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