JAVA 代码生成。SimpleCaptcha

去官方网站下载Jar包：

http://simplecaptcha.sourceforge.net/

Javadocs:

http://simplecaptcha.sourceforge.net/javadocs/index.html

自己书写工具类：

/*

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 * and open the template in the editor.

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package com.sino.gxh.util;





import java.awt.Color;

import java.awt.Font;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import nl.captcha.Captcha;

import nl.captcha.gimpy.FishEyeGimpyRenderer;

import nl.captcha.gimpy.RippleGimpyRenderer;

import nl.captcha.noise.CurvedLineNoiseProducer;

import nl.captcha.servlet.CaptchaServletUtil;

import nl.captcha.text.producer.DefaultTextProducer;

import nl.captcha.text.renderer.ColoredEdgesWordRenderer;

import nl.captcha.text.renderer.WordRenderer;





/**

 *

 * @author Administrator

 */

public class CodeMaker {





    //验证码内容

    private char[] numberChar = new char[]{'a', 'b', 'c', 'd',

        'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};

    //验证码数量

    private int _CodeCount = 4;

    //验证码宽度

    private int _width = 110;

    //验证码高度

    private int _height = 50;

    //验证码颜色

    private Color _CodeColor = Color.BLACK;

    //使用字体名字

    private String _FontName = "System";

    //使用字体类型

    private int _FontType = Font.BOLD;

    //使用字体大小

    private int _FontSize = 40;

    //干扰线颜色

    private Color _NoiseColor = Color.BLACK;

    //干扰线大小

    private int _NoiseSize = 2;

    //干扰线条数

    private int _NoiseCount = 1;

    //验证图形码时是否开启大写和小写

    private boolean whetherOpenBigOrSmall = false;





    //验证码储存

    private String CodeMemory;





    //获取验证码

    public void getCode(HttpServletResponse resp) {

        Captcha.Builder captcha = new Captcha.Builder(_width, _height);

        List<Font> fontList = new ArrayList<Font>();

        List<Color> colorList = new ArrayList<Color>();

        colorList.add(_CodeColor);

        fontList.add(new Font(_FontName, _FontType, _FontSize));

        WordRenderer dwr = new ColoredEdgesWordRenderer(colorList, fontList);

        captcha.addText(new DefaultTextProducer(_CodeCount, numberChar), dwr);

        for (int i = 0; i < _NoiseCount; i++) {

            captcha.addNoise(new CurvedLineNoiseProducer(_NoiseColor, _NoiseSize));

        }

        captcha.gimp(new FishEyeGimpyRenderer(new Color(0, 0, 0, 0), new Color(0, 0, 0, 0)));

        captcha.gimp(new RippleGimpyRenderer());

        captcha.build();

        Captcha captchas = captcha.build();

        CaptchaServletUtil.writeImage(resp, captchas.getImage());

        CodeMemory = captchas.getAnswer();

    }





    //比較验证码

    public boolean compareCode(String Code) {

        if (null == Code || "".equals(Code)) {

            return false;

        } else {

            boolean bz;

            System.out.println(whetherOpenBigOrSmall);

            if (whetherOpenBigOrSmall) {

                bz = CodeMemory.equals(Code);

            } else {

                bz = CodeMemory.equalsIgnoreCase(Code);

            }

            return bz;

        }

    }





    public boolean isWhetherOpenBigOrSmall() {

        return whetherOpenBigOrSmall;

    }





    public void setWhetherOpenBigOrSmall(boolean whetherOpenBigOrSmall) {

        this.whetherOpenBigOrSmall = whetherOpenBigOrSmall;

    }





    public char[] getNumberChar() {

        return numberChar;

    }





    public void setNumberChar(char[] numberChar) {

        this.numberChar = numberChar;

    }





    public int getCodeCount() {

        return _CodeCount;

    }





    public void setCodeCount(int _CodeCount) {

        this._CodeCount = _CodeCount;

    }





    public int getWidth() {

        return _width;

    }





    public void setWidth(int _width) {

        this._width = _width;

    }





    public int getHeight() {

        return _height;

    }





    public void setHeight(int _height) {

        this._height = _height;

    }





    public Color getCodeColor() {

        return _CodeColor;

    }





    public void setCodeColor(Color _CodeColor) {

        this._CodeColor = _CodeColor;

    }





    public String getFontName() {

        return _FontName;

    }





    public void setFontName(String _FontName) {

        this._FontName = _FontName;

    }





    public int getFontType() {

        return _FontType;

    }





    public void setFontType(int _FontType) {

        this._FontType = _FontType;

    }





    public int getFontSize() {

        return _FontSize;

    }





    public void setFontSize(int _FontSize) {

        this._FontSize = _FontSize;

    }





    public Color getNoiseColor() {

        return _NoiseColor;

    }





    public void setNoiseColor(Color _NoiseColor) {

        this._NoiseColor = _NoiseColor;

    }





    public int getNoiseSize() {

        return _NoiseSize;

    }





    public void setNoiseSize(int _NoiseSize) {

        this._NoiseSize = _NoiseSize;

    }





    public int getNoiseCount() {

        return _NoiseCount;

    }





    public void setNoiseCount(int _NoiseCount) {

        this._NoiseCount = _NoiseCount;

    }





}

调用和比較：

@RequestMapping(value = "/imagesanpeng", method = RequestMethod.GET)

    protected void imagesanpeng(HttpServletRequest req, HttpServletResponse resp)

            throws Exception {

        CodeMaker c = new CodeMaker();

        c.getCode(resp);

        req.getSession().setAttribute("code", c);

    }





    @RequestMapping(value = "/txmbj", method = RequestMethod.POST)

    protected void txmbj(HttpServletRequest req, HttpServletResponse resp,

            @RequestParam(value = "txyzm", required = true) String txyzm)

            throws Exception {

        CodeMaker c = (CodeMaker) req.getSession().getAttribute("code");

        c.setWhetherOpenBigOrSmall(true);

        resp.getWriter().print(c.compareCode(txyzm));

        resp.getWriter().flush();

        resp.getWriter().close();

//        CodeMaker c = new CodeMaker();

//        c.setWhetherOpenBigOrSmall(true);

//        resp.getWriter().print(c.compareCode(req, resp, txyzm));

//        resp.getWriter().flush();

//        resp.getWriter().close();

    }

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