fuint-framework/fuint-component/src/main/java/com/fuint/captcha/service/CaptchaService.java

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package com.fuint.captcha.service;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.fuint.util.StringUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;


/**
 * 图形验证码插件服务类
 * Created by FSQ
 * Contact wx fsq_better
 */
@Service
public class CaptchaService {

    private static final Logger logger = LoggerFactory.getLogger(CaptchaService.class);

    @Resource
    private Producer captchaProducer;

    /**
     * 生成图形验证码,并保存至Session
     * @param session Session
     * @return BufferedImage
     */
    public BufferedImage getCode(HttpSession session){
        //生成验证码
        String codeText = captchaProducer.createText();
        BufferedImage codeImage = captchaProducer.createImage(codeText);
        logger.info("生成验证码{}", codeText);

        //设置Session信息
        if(session != null){
            session.setAttribute(Constants.KAPTCHA_SESSION_KEY, codeText);
        }

        return codeImage;
    }

    /**
     * 图形验证码校验
     * @param code 输入的验证码
     * @param session Session
     * @return Boolean
     */
    public Boolean checkCode(String code, HttpSession session){
        String sessionCode = (String) session.getAttribute(Constants.KAPTCHA_SESSION_KEY);
        if(StringUtil.isEmpty(code) || StringUtil.isEmpty(sessionCode)){
            return false;
        }else{
            if(code.equalsIgnoreCase(sessionCode)){
                return true;
            }else{
                return false;