drawrandservlet.java

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package com.yhcms.manage.admin.biz;

import java.awt.image.RenderedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.*;

public class DrawRandServlet extends HttpServlet
{

    private ServletConfig config;

    public DrawRandServlet()
    {
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        response.setHeader("Cache-Control", "no-cache");
        response.setHeader("Cache-Control", "no-store");
        response.setDateHeader("Expires", 0L);
        response.setHeader("Pragma", "no-cache");
        ImageIO.write((RenderedImage)DrawRandNumber.getInstance().drawRandNumber(4, 10, request), "JPEG", response.getOutputStream());
    }

    public void doPut(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        doGet(request, response);
    }

    public final ServletConfig getServletConfig()
    {
        return config;
    }

    public final void init(ServletConfig config)
        throws ServletException
    {
        this.config = config;
    }
}