一个使用servlet随机生成双色球的代码

来源：互联网发布：四小票采集软件编辑：程序博客网时间：2024/06/04 19:14

public class DoubleColorBall extends HttpServlet
{

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
// 设置一个容器，来装红球
List<Integer> list = new ArrayList<Integer>();

Random random = new Random();

while (list.size() < 6)
{
int x = random.nextInt(33) + 1;
list.add(x);
for(int i = 0;i<list.size()-1;i++)
{
if(x ==list.get(i))
list.remove(list.size()-1); //解决重复问题，每当加入之后，就去判断是否和上一个下标所对应的容器元素的值是否相同，解决问题
}

}
Collections.sort(list); //排序

// 制造蓝球必中
int blueBall = random.nextInt(16) + 1;

String result = " ";

Iterator it = list.iterator();

while (it.hasNext())
{
result += it.next() + " ";
}

result = "RedBall:" + result + "<br/>" + "BlueBall:" + blueBall;

resp.setContentType("text/html");
resp.setCharacterEncoding("UTF-8");

PrintWriter pout = resp.getWriter();

pout.println("<html><head><title>DoubleColorBallSs</title></head>");
pout.println("<body><h1>" + result + "</h1></body>");

}

}

=============================================================================================================================

JSP端

</head>

<body> 
<a href="/test1/DoubleColorBall" target="_blank" ><h1 color= "red" >点击中奖发财</h1></a>
</body>
</html>

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