📄 useridsservlet.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 UserIDsServlet extends HttpServlet{
    private int nextID=0;
    
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>Your ID</TITLE></HEAD>");
		out.println("    <CENTER>");
		out.println("  <BODY BGCOLOR=\"#FDF5E6\">");
		out.print("    <H1>Your ID</H1>");
		
		/*
		  String id="User-ID"+nextID;
		  out.println("<H2>"+id+"<H2>");
		  nextID=nextID+1;
        */
		
		/*
		  String id="User-ID"+nextID++;
		  out.println("<H2>"+id+"<H2>");
        */
		synchronized(this)
		{
			String id="User-ID"+nextID;
			out.println("<H2>"+id+"<H2>");
			nextID=nextID+1;
		}
		
		out.println("  </BODY>");
		out.println("</HTML>");
		//out.flush();
		//out.close();
	}

}

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