java实现图片验证码全套实现方式

时间：2023-02-05 08:34:46

百度网盘demo提取地址:

https://pan.baidu.com/s/1dF81khN

java引用的包

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

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

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.session.Session;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.github.bingoohuang.patchca.custom.ConfigurableCaptchaService;
import com.github.bingoohuang.patchca.filter.FilterFactory;
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.utils.encoder.EncoderHelper;
import com.yjf.easylife.web.security.util.CaptchaFactory;

控制器代码

@Controller
@RequestMapping("/security")
public class ValidateController {

/**
 * 日志对象
 */
protected final Logger logger = LoggerFactory.getLogger(getClass());

private static final long serialVersionUID = 1L;

private static ConfigurableCaptchaService cs = CaptchaFactory.getInstance();

private static List<FilterFactory> factories;

static {
        factories = new ArrayList<FilterFactory>();
        factories.add(new CurvesRippleFilterFactory(cs.getColorFactory()));
        factories.add(new MarbleRippleFilterFactory());
        factories.add(new DoubleRippleFilterFactory());
        factories.add(new WobbleRippleFilterFactory());
        factories.add(new DiffuseRippleFilterFactory());
    }

@RequestMapping("/getImage.htm")
public void getImage(HttpServletRequest request, HttpServletResponse response) {
try {
            cs.setFilterFactory(factories.get(new Random().nextInt(5)));
            setResponseHeaders(response);

            Session session = SecurityUtils.getSubject().getSession();;
            String token = EncoderHelper.getChallangeAndWriteImage(cs, "png",
                response.getOutputStream());
            session.setAttribute("EASYLIFE_CAPCHA", token);

            logger.info("当前的SessionID = " + session.getId() + "， 验证码 = " + token);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

private 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);
    }
}

CaptchaFactory实现代码

import com.github.bingoohuang.patchca.color.RandomColorFactory;
import com.github.bingoohuang.patchca.custom.ConfigurableCaptchaService;
import com.github.bingoohuang.patchca.word.RandomWordFactory;

public class CaptchaFactory {

    private static ConfigurableCaptchaService cs = new ConfigurableCaptchaService();

    static {
        cs.setColorFactory(new RandomColorFactory());
        RandomWordFactory wf = new RandomWordFactory();
        wf.setCharacters("1234567890");
        wf.setMaxLength(4);
        wf.setMinLength(4);
        cs.setWordFactory(wf);
    }

    public static ConfigurableCaptchaService getInstance() {
        return cs;
    }
}

html代码

<html>
<head></head>
<body>
<div class="p-new-in"> 
<span class="p-new-inname">验证码</span>
<input type="text" name="customCaptcha" class="p-new-input p-new-w177" placeholder="请输入图片验证码" /> 
<span class="p-new-code l-mar-r15"> <img src="/security/getImage.htm" class="reloadImage" id="reloadImage" width="121" height="40" /> </span> 
<a href="javaScript:;" class="l-color9 reloadImage">看不清楚，换一张</a> 
</div>
</body>
</html>

js代码

$(".reloadImage").click(function () {
    //获取当前的时间作为参数，无具体意义
    var timenow = new Date().getTime();
    $('#reloadImage').attr("src", "/security/getImage.htm?date=" + timenow);
});

判断验证码是否正确

/**
 *
 * Created by cike-zihao on 2015/11/25
 */
package com.yjf.easylife.common.util;

import org.apache.commons.lang3.StringUtils;

import javax.servlet.http.HttpServletRequest;
/**
 * Created by cike-zihao on 2015/11/25.
 */
public class SecurityCodeUtil {
public static boolean whetherImgCaptchaMatch(String customCaptcha,
        HttpServletRequest request) {
boolean captchaMatch = true;

        String requestCaptcha = (String) request.getSession()
                                                .getAttribute("EASYLIFE_CAPCHA");

if (!StringUtils.equals(customCaptcha, requestCaptcha)) {
            captchaMatch = false;
        }

return captchaMatch;
    }
}
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