官方的色调单一，随机色也不随机，黑不拉几的，很难看。

为此做了扩展实现，并整合了spring mvc，生成的验证码漂亮多了。

官网：

官方效果：

下面是我整合到spring并修扩展后的效果：

package com.lavasoft.ntv.web;import org.patchca.color.ColorFactory;import org.patchca.filter.predefined.*;import org.patchca.service.ConfigurableCaptchaService;import org.patchca.utils.encoder.EncoderHelper;import org.patchca.word.RandomWordFactory;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import java.awt.*;import java.io.IOException;import java.util.Random;/** * patchca生成多彩验证码 * * @author leizhimin 14-5-5 下午11:51 */@Controllerpublic class Login2Controller {    private static ConfigurableCaptchaService cs = new ConfigurableCaptchaService();    private static Random random = new Random();    static {//        cs.setColorFactory(new SingleColorFactory(new Color(25, 60, 170)));        cs.setColorFactory(new ColorFactory() {            @Override            public Color getColor(int x) {                int[] c = new int[3];                int i = random.nextInt(c.length);                for (int fi = 0; fi < c.length; fi++) {                    if (fi == i) {                        c[fi] = random.nextInt(71);                    } else {                        c[fi] = random.nextInt(256);                    }                }                return new Color(c[0], c[1], c[2]);            }        });        RandomWordFactory wf = new RandomWordFactory();        wf.setCharacters("23456789abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ");        wf.setMaxLength(4);        wf.setMinLength(4);        cs.setWordFactory(wf);    }    @RequestMapping("/pcrimg")    public void crimg(HttpServletRequest request, HttpServletResponse response) throws IOException {        switch (random.nextInt(5)) {            case 0:                cs.setFilterFactory(new CurvesRippleFilterFactory(cs.getColorFactory()));                break;            case 1:                cs.setFilterFactory(new MarbleRippleFilterFactory());                break;            case 2:                cs.setFilterFactory(new DoubleRippleFilterFactory());                break;            case 3:                cs.setFilterFactory(new WobbleRippleFilterFactory());                break;            case 4:                cs.setFilterFactory(new DiffuseRippleFilterFactory());                break;        }        HttpSession session = request.getSession(false);        if (session == null) {            session = request.getSession();        }        setResponseHeaders(response);        String token = EncoderHelper.getChallangeAndWriteImage(cs, "png", response.getOutputStream());        session.setAttribute("captchaToken", token);        System.out.println("当前的SessionID=" + session.getId() + "，验证码=" + token);    }    protected void setResponseHeaders(HttpServletResponse response) {        response.setContentType("image/png");        response.setHeader("Cache-Control", "no-cache, no-store");        response.setHeader("Pragma", "no-cache");        long time = System.currentTimeMillis();        response.setDateHeader("Last-Modified", time);        response.setDateHeader("Date", time);        response.setDateHeader("Expires", time);    }}

Spring中无需多余配置，这样就好，相当的简单。