checkcodeservlet.java

jsp 信息管理系统 jsp 信息管理系统 jsp 信息管理系统

package com.test.servlet;

import java.awt.image.BufferedImage;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.test.util.CheckCode;

public class CheckCodeServlet extends HttpServlet {

	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		resp.setHeader("Pragma", "No-cache");
		resp.setHeader("Cache-Control", "no-cache");
		resp.setDateHeader("Expires", 0);
		resp.setContentType("image/jpeg");
		CheckCode cc = new CheckCode(4);
		cc.setHeight(20);
		cc.generator();
		BufferedImage bi = (BufferedImage) cc.getRandomImage();
		req.getSession().setAttribute("rand", cc.getRand());
		ImageIO.write(bi, "jpeg", resp.getOutputStream());
	}

	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(req, resp);
	}

}