someservlet.java

一个很不错的网上小型购物系统

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;

public class SomeServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html;charset=utf-8");
		String username = request.getParameter("username");
		PrintWriter out = response.getWriter();
		try {
			Thread.sleep(5000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		if ("java".equals(username)) {
			out.print("可以使用");
		} else {
			out.print("已经占用");
		}
		out.flush();
		out.close();
	}

}