java + springmvc 酷炫验证码分享

java + springmvc 酷炫验证码分享

一、maven 依赖

<!-- https://mvnrepository.com/artifact/com.github.bingoohuang/patchca -->
<!-- 验证码 -->
<dependency>
  <groupId>com.github.bingoohuang</groupId>
  <artifactId>patchca</artifactId>
  <version>0.0.1</version>
</dependency>  
<!-- 验证码 -->

二、spring mvc 控制器

import java.awt.Color;
import java.io.IOException;
import java.util.Random;


import javax.servlet.http.*;


import com.github.bingoohuang.patchca.background.*;
import com.github.bingoohuang.patchca.color.*;
import com.github.bingoohuang.patchca.custom.*;
import com.github.bingoohuang.patchca.filter.predefined.*;
import com.github.bingoohuang.patchca.font.*;
import com.github.bingoohuang.patchca.utils.encoder.EncoderHelper;
import com.github.bingoohuang.patchca.word.*;


@Controller
@RequestMapping("/login")
public class DemoController {
  /**
  * 彩色，验证码
  * @param request
  * @param response
  * @throws IOException
  */
  @RequestMapping("/verfiy-code")
  public void VerifyCode(HttpServletRequest request, HttpServletResponse response) {
    //生成验证码并写入输出流
    String code = com.galaxyf.xd.web.utilis.VerifyCode.outputCaptcha(request, response);
    //记录验证码到 session
    /*
      HttpSession session = req.getSession();
      session.setAttribute("verify-code", code);
     * */
  }  
}


三、验证码生产类（VerifyCode.java）


package com.springdemo.controller;


import java.awt.Color;
import java.io.IOException;
import java.util.Random;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


import com.github.bingoohuang.patchca.background.MyCustomBackgroundFactory;
import com.github.bingoohuang.patchca.color.ColorFactory;
import com.github.bingoohuang.patchca.custom.ConfigurableCaptchaService;
import com.github.bingoohuang.patchca.filter.predefined.CurvesRippleFilterFactory;
import com.github.bingoohuang.patchca.filter.predefined.DiffuseRippleFilterFactory;
import com.github.bingoohuang.patchca.filter.predefined.DoubleRippleFilterFactory;
import com.github.bingoohuang.patchca.filter.predefined.MarbleRippleFilterFactory;
import com.github.bingoohuang.patchca.filter.predefined.WobbleRippleFilterFactory;
import com.github.bingoohuang.patchca.font.RandomFontFactory;
import com.github.bingoohuang.patchca.utils.encoder.EncoderHelper;
import com.github.bingoohuang.patchca.word.RandomWordFactory;


public class VerifyCode {
  static Logger log = Logger.getLogger(VerifyCode.class);
  private static ConfigurableCaptchaService cs = new ConfigurableCaptchaService();
  private static Random random = new Random();
  static int verifyCodeType=1;//验证码字符集
  /**
   * 参数初始化
   */
  static {
    // cs.setColorFactory(new SingleColorFactory(new Color(25, 60, 170)));
    // 设置颜色
    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();
    //验证码字符集
    switch (verifyCodeType) {
      case 1: //纯数字
        wf.setCharacters("0123456789");
        break;
      case 2: //纯字母
        wf.setCharacters("abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ");
        break;
      default: //数字字母混合
        wf.setCharacters("23456789abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ");
        break;
    }    
    // 验证码位数
    wf.setMaxLength(4); // 最大
    wf.setMinLength(4); // 最小
    cs.setWordFactory(wf);
    // 设置图片大小
    cs.setWidth(170);
    cs.setHeight(60);
    // 设置字体大小
    RandomFontFactory font = new RandomFontFactory();
    font.setMaxSize(32);
    font.setMinSize(42);
    cs.setFontFactory(font);
    // 干扰线
    MyCustomBackgroundFactory background = new MyCustomBackgroundFactory();
    cs.setBackgroundFactory(background);
  }


  /**
   * 设置 http 相应头信息
   * 
   * @param response
   */
  protected static 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);
  }


  /**
   * 输出验证码到响应流
   * 
   * @param request
   * @param response
   * @throws IOException
   */
  public static String outputCaptcha(HttpServletRequest request, HttpServletResponse response) {
    //验证码效果
    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 verifyCode="";
    try {
      // 验证码
      verifyCode = EncoderHelper.getChallangeAndWriteImage(cs, "png", response.getOutputStream());      
    } catch (Exception e) {
      log.error(e.getMessage(),e);
      verifyCode="....";
    }
    return verifyCode;
  }
}

四、测试

访问：http://localhost:8080/xxxxx/login/verfiy-code