生成验证码图片 参考

 

import java.awt.Color;
import java.awt.Font;

import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
import com.octo.captcha.component.image.backgroundgenerator.FileReaderRandomBackgroundGenerator;
import com.octo.captcha.component.image.color.RandomListColorGenerator;
import com.octo.captcha.component.image.fontgenerator.FontGenerator;
import com.octo.captcha.component.image.fontgenerator.RandomFontGenerator;
import com.octo.captcha.component.image.textpaster.DecoratedRandomTextPaster;
import com.octo.captcha.component.image.textpaster.TextPaster;
import com.octo.captcha.component.image.textpaster.textdecorator.TextDecorator;
import com.octo.captcha.component.image.wordtoimage.ComposedWordToImage;
import com.octo.captcha.component.image.wordtoimage.WordToImage;
import com.octo.captcha.component.word.wordgenerator.RandomWordGenerator;
import com.octo.captcha.component.word.wordgenerator.WordGenerator;
import com.octo.captcha.engine.image.ListImageCaptchaEngine;
import com.octo.captcha.image.gimpy.GimpyFactory;

/**
 * 生成验证码图片
 * ============================================================================
 */

public class JCaptchaEngine extends ListImageCaptchaEngine {

 public static final String IMAGE_CAPTCHA_KEY = "imageCaptcha";// ImageCaptcha对象存放在Session中的key
 public static final String CAPTCHA_INPUT_NAME = "j_captcha";// 验证码输入表单名称
 public static final String CAPTCHA_IMAGE_URL = "/captcha.jpg";// 验证码图片URL
 private static final Integer MIN_WORD_LENGTH = 4;// 验证码最小长度
 private static final Integer MAX_WORD_LENGTH = 4;// 验证码最大长度
 private static final Integer IMAGE_HEIGHT = 28;// 验证码图片高度
 private static final Integer IMAGE_WIDTH = 80;// 验证码图片宽度
 private static final Integer MIN_FONT_SIZE = 16;// 验证码最小字体
 private static final Integer MAX_FONT_SIZE = 16;// 验证码最大字体
 private static final String RANDOM_WORD = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";// 随机字符
 private static final String IMAGE_PATH = "./com/lenovo/lps/psb/pushmarketing/captcha/";// 随机背景图片路径
 
 // 验证码随机字体
 private static final Font[] RANDOM_FONT = new Font[] {
   new Font("nyala", Font.BOLD, MIN_FONT_SIZE),
   new Font("Arial", Font.BOLD, MIN_FONT_SIZE),
   new Font("Bell MT", Font.BOLD, MIN_FONT_SIZE),
   new Font("Credit valley", Font.BOLD, MIN_FONT_SIZE),
   new Font("Impact", Font.BOLD, MIN_FONT_SIZE)
 };

 // 验证码随机颜色
 private static final Color[] RANDOM_COLOR = new Color[] {
   new Color(255, 255, 255),
   new Color(255, 220, 220),
   new Color(220, 255, 255),
   new Color(220, 220, 255),
   new Color(255, 255, 220),
   new Color(220, 255, 220)
 };

 // 生成验证码
 @Override
 protected void buildInitialFactories() {

  RandomListColorGenerator randomListColorGenerator = new RandomListColorGenerator(RANDOM_COLOR);

  BackgroundGenerator backgroundGenerator = new FileReaderRandomBackgroundGenerator(IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_PATH);

  WordGenerator wordGenerator = new RandomWordGenerator(RANDOM_WORD);

  FontGenerator fontGenerator = new RandomFontGenerator(MIN_FONT_SIZE, MAX_FONT_SIZE, RANDOM_FONT);

  TextDecorator[] textDecorator = new TextDecorator[] {};

  TextPaster textPaster = new DecoratedRandomTextPaster(MIN_WORD_LENGTH, MAX_WORD_LENGTH, randomListColorGenerator, textDecorator);

  WordToImage wordToImage = new ComposedWordToImage(fontGenerator, backgroundGenerator, textPaster);

  addFactory(new GimpyFactory(wordGenerator, wordToImage));
 }

}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

import javax.imageio.ImageIO;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.octo.captcha.service.CaptchaService;
import com.octo.captcha.service.CaptchaServiceException;

/**
 * 拦截器 - 生成验证码图片
 * ============================================================================
 */

@Component("jCaptchaFilter")
public class JCaptchaFilter implements Filter {

 @Autowired
 private CaptchaService captchaService;

 
 public CaptchaService getCaptchaService() {
  return captchaService;
 }

 public void setCaptchaService(CaptchaService captchaService) {
  this.captchaService = captchaService;
 }

 public void init(FilterConfig fConfig) throws ServletException {}

 public void destroy() {}

 public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
  HttpServletRequest request = (HttpServletRequest) servletRequest;
  HttpServletResponse response = (HttpServletResponse) servletResponse;
  response.setHeader("Cache-Control", "no-store");
  response.setHeader("Pragma", "no-cache");
  response.setDateHeader("Expires", 0);
  response.setContentType("image/jpeg");
  ServletOutputStream out = response.getOutputStream();
  try {
   String captchaId = request.getSession(true).getId();
   BufferedImage challenge = (BufferedImage) captchaService.getChallengeForID(captchaId, request.getLocale());
   ImageIO.write(challenge, "jpg", out);
   out.flush();
  } catch (CaptchaServiceException e) {
   e.printStackTrace();
  } finally {
   out.close();
  }
 }

}