Servlet 完成一个随机生成双色球的DEMO
要求：生成6个红球，数字在1-33之间，数字不能重复且有序，生成1个蓝球，数字在1-16之间
package com.wansha.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
import java.util.TreeSet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DoubleColorBallServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
TreeSet<Integer> ts = new TreeSet<Integer>();
Random ran = new Random();
while(ts.size()<7){
ts.add(ran.nextInt(33)+1);
}
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
PrintWriter pw = response.getWriter();
pw.write("<html><head></head><body>");
pw.write("红球结果是" + ts.toString());
int blueBall = ran.nextInt(16)+1;
pw.write("蓝球结果是" + blueBall);
pw.write("</body></html>");
pw.flush();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
}