摘要：引入依賴添加驗(yàn)證碼生成器是否有邊框默認(rèn)為我們可以自己設(shè)置，邊框顏色默認(rèn)為邊框粗細(xì)度默認(rèn)為驗(yàn)證碼生成器默認(rèn)為驗(yàn)證碼文本生成器默認(rèn)為驗(yàn)證碼文本字符內(nèi)容范圍默認(rèn)為驗(yàn)證碼文本字符長(zhǎng)度默認(rèn)為驗(yàn)證碼文本字體樣式默認(rèn)為驗(yàn)證碼文本字符大小默

引入依賴

    com.github.axet
        kaptcha
    0.0.9

Spring-mvc.xml添加

    
        
            
                
                    
                        no
                        black
                        5
                        5
                        com.google.code.kaptcha.impl.ShadowGimpy
                        
                    
                
            
        
    

生成驗(yàn)證碼

@RequestMapping(value = "/captchaImg", method = RequestMethod.GET)
public void image(HttpServletRequest request, HttpServletResponse response) throws Exception {
    response.setDateHeader("Expires", 0);
    response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
    response.addHeader("Cache-Control", "post-check=0, pre-check=0");
    response.setHeader("Pragma", "no-cache");
    response.setContentType("image/jpeg");
    String capText = captchaProducer.createText();
    //生成圖片驗(yàn)證碼
    BufferedImage image = captchaProducer.createImage(capText);
    //保存到shiro session
    SecurityUtils.getSubject().getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

    ServletOutputStream out = response.getOutputStream();
    ImageIO.write(image, "jpg", out);
    try {
        out.flush();
    } finally {
        out.close();
    }
}

驗(yàn)證驗(yàn)證碼

@RequestMapping(value = "/captchaValid", method = RequestMethod.POST)
@ResponseBody
public Message captchaValid(String captcha) throws Exception {
    String kaptcha = SecurityUtils.getSubject().getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY).toString();
    SecurityUtils.getSubject().getSession().removeAttribute(Constants.KAPTCHA_SESSION_KEY);
    if (captcha.equalsIgnoreCase(kaptcha)) {
        return Message.success("驗(yàn)證成功");
    }
    return Message.error("驗(yàn)證碼不正確");
}

合并后為

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.apache.shiro.SecurityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;

/**
 * Controller - 驗(yàn)證碼
 *
 * @author liaoyx
 * @version 1.0
 */
@Controller("mgmtCaptchaController")
@RequestMapping("/mgmt/captcha")
public class CaptchaController extends BaseController {

    private Producer captchaProducer = null;

    @Autowired
    public void setCaptchaProducer(Producer captchaProducer) {
        this.captchaProducer = captchaProducer;
    }

    @RequestMapping(value = "/captchaImg", method = RequestMethod.GET)
    public void image(HttpServletRequest request, HttpServletResponse response) throws Exception {
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        String capText = captchaProducer.createText();
        //生成圖片驗(yàn)證碼
        BufferedImage image = captchaProducer.createImage(capText);
        //保存到shiro session
        SecurityUtils.getSubject().getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(image, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
    }

    @RequestMapping(value = "/captchaValid", method = RequestMethod.POST)
    @ResponseBody
    public Message captchaValid(String captcha) throws Exception {
        String kaptcha = SecurityUtils.getSubject().getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY).toString();
        SecurityUtils.getSubject().getSession().removeAttribute(Constants.KAPTCHA_SESSION_KEY);
        if (captcha.equalsIgnoreCase(kaptcha)) {
            return R.success("驗(yàn)證成功");
        }
        return R.error("驗(yàn)證碼不正確");
    }

}

參數(shù)詳解