codeservlet.java

一个不错的bbs论坛系统．对初学者很有帮助

package com.yhbbs.utils;

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 CodeServlet extends HttpServlet {

	private ServletConfig config;

	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) CodeNumber.getInstance().codeNumber(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;
	}
}