JSP验证码+js验证

servlet实现图片验证码,只需在客户端进行验证.非常好用

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.awt.Graphics;
import java.awt.*;
import javax.imageio.ImageIO;

public class RandomGraphics2 extends HttpServlet
{
	
	int widthheight;

	public void init（） throws ServletException {
	    width = 80;
	    height = 30;
    }
		
	
	public void doGet （HttpServletRequest request HttpServletResponse response） throws ServletException IOException
	{
		PrintWriter out;
		ServletOutputStream outb;

		outb=response.getOutputStream（）;

		response.setHeader （“Pragma“ “no-cache“）;
		response.setHeader （“Cache-Control“ “no-cache“）;
		response.setDateHeader （“Expires“0）;
		//response.setContentType（“image/jpeg“）;

		if（（request.getParameter（“width“） != null） || （!request.getParameter（“wid

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       2314  2007-09-29 09:10  random2.html

     文件       3042  2007-09-26 17:54  RandomGraphics2.java

----------- ---------  ---------- -----  ----

                 5356                    2