关于struts分页和防灌水的随机验证码解决办法

关于struts分页和防灌水的随机验证码
本人今年毕业生，正在实习，手头的小项目需要这两个东西，请大家指点指点啊

最好能给点代码读读，谢谢各位前辈了啊  

一定给大分

------解决方案--------------------
分页 http://blog.csdn.net/shan_wei/archive/2005/04/27/364912.aspx
------解决方案--------------------
验证码：

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
import java.awt.*;
import java.awt.image.*;
import java.util.*;
import javax.imageio.*;

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

public class CheckCode extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType( "image/jpeg ");
response.setHeader( "Pragma ", "No-cache ");
response.setHeader( "Cache-Control ", "no-cache ");
response.setDateHeader( "Expires ", 0);
HttpSession session = request.getSession();
// 在内存中创建图象
int width = 90, height = 20;
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);

// 获取图形上下文
Graphics g = image.getGraphics();

// 生成随机类
Random random = new Random();

// 设定背景色
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);

// 设定字体
g.setFont(new Font( "Arial ", Font.BOLD | Font.ITALIC, 16));

// 画边框
// g.setColor(new Color());
// g.drawRect(0,0,width-1,height-1);

// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160, 200));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}

// 存储校验码字符串数组
String[] codearray = { "1 ", "2 ", "3 ", "4 ", "5 ", "6 ", "7 ", "8 ", "9 ",
"0 ", "A ", "B ", "C ", "D ", "E ", "F ", "G ", "H ", "I ", "J ", "K ",
"L ", "M ", "N ", "O ", "P ", "Q ", "R ", "S ", "T ", "U ", "V ", "W ",
"X ", "Y ", "Z " };

// 随机产生6位认证码
String sRand = " ";
for (int i = 0; i < 6; i++) {

String rand = codearray[random.nextInt(36)];
sRand += rand;
// 将认证码显示到图象中
g.setColor(new Color(20 + random.nextInt(10), 20 + random
.nextInt(90), 20 + random.nextInt(200))); g.drawString(rand, 13 * i + 6, 16);
}

// 将认证码存入SESSION
session.setAttribute( "rand ", sRand);
// 图象生效
g.dispose();
ServletOutputStream responseOutputStream = response.getOutputStream();
// 输出图象到页面
ImageIO.write(image, "JPEG ", responseOutputStream);

responseOutputStream.flush();
responseOutputStream.close();
}

Color getRandColor(int fc, int bc) { // 给定范围获得随机颜色
Random random = new Random();
if (fc > 255) {
fc = 255;
}
if (bc > 255) {
bc = 255;
}
int r = fc + random.nextInt(bc - fc);