📄 showtemperature.java

📁 servlet初学者最好的例子……希望能对大家有所帮助

💻 JAVA

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package servlet;

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

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@SuppressWarnings("serial")
public class ShowTemperature extends HttpServlet {

	
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html;charset=gb2312");
		PrintWriter out = response.getWriter();
		
		String temp=(String)getServletConfig().getServletContext().getAttribute("temp");
		if(temp==null)
		{ 			
			temp=new String("0");	
		}
		String oldTemp=(String)request.getSession().getAttribute("oldTemp");
		
		out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>气温信息显示</TITLE></HEAD>");
		out.println("  <BODY>");
		
		out.println("当前最新气温: "+temp+"摄氏度");
		if(oldTemp!=null)
		{
			out.println("<BR>");
			out.println("更新前气温："+oldTemp+"摄氏度");
		}
	
		out.println("  </BODY>");
		out.println("</HTML>");
		request.getSession().setAttribute("oldTemp",temp);
		//out.flush();
		//out.close();
	}

}

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