Servlet 完成一个随机生成双色球的DEMO-优快云博客

本文链接：https://blog.youkuaiyun.com/xpsharp/article/details/6838035

本博客展示了如何使用Servlet生成6个红球（数字在1-33之间且不重复），并生成1个蓝球（数字在1-16之间），实现随机生成双色球的DEMO。

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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 {

	}

}