【springboot系列】springboot实现图片验证码captcha

在maven仓库中查找，发现只有这个依赖，所以直接复制这个即可

        
            com.github.whvcse
            easy-captcha
            1.6.2
        

总共有这么多种验证类型

package com.walker.third.easyCaptcha;

import com.wf.captcha.*;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@RestController
public class CaptchaController {


    
    @GetMapping("/arithmeticCaptcha")
    public void captcha(HttpServletResponse response) throws IOException {
        ArithmeticCaptcha captcha = new ArithmeticCaptcha(138, 54);
        captcha.setLen(3);
        String arithmeticString = captcha.getArithmeticString();
        //获取算数过程的字符串
        System.out.println(arithmeticString);
        //获取算数结果
        System.out.println(captcha.text());

        response.setContentType("image/gif");
        response.setHeader("Pragma", "No-cache");
        response.setHeader("Cache-Control", "no-cache");
        response.setDateHeader("Expires", 0);

        captcha.out(response.getOutputStream());
    }


    
    @GetMapping("chineseCaptcha")
    public void chineseCaptcha(HttpServletResponse response) throws IOException {

        ChineseCaptcha chineseCaptcha = new ChineseCaptcha();
        chineseCaptcha.setLen(5);

        chineseCaptcha.out(response.getOutputStream());
    }

    
    @GetMapping("gifCaptcha")
    public void gifCaptcha(HttpServletResponse response) throws IOException {
        GifCaptcha gifCaptcha = new GifCaptcha();
        gifCaptcha.out(response.getOutputStream());
    }

    
    @GetMapping("chineseGifCaptcha")
    public void chineseGifCaptcha(HttpServletResponse response) throws IOException {
        ChineseGifCaptcha chineseGifCaptcha = new ChineseGifCaptcha();
        chineseGifCaptcha.out(response.getOutputStream());
    }


    
    @GetMapping("specCaptcha")
    public void spec(HttpServletResponse response) throws IOException {
        SpecCaptcha specCaptcha = new SpecCaptcha();
        specCaptcha.out(response.getOutputStream());

    }
}

具体结果如下：
算数ArithmeticCaptcha：

中文ChineseCaptcha：

GifCaptcha
不断闪烁

SpecCaptcha：英文字母

中文gif：中文不断闪烁

可以将其与uuid和验证码结果保存在缓存中，如果是本地，可以保存在guava中，也可以保存在redis中，或者mysql数据库也可以（在数据量相对较小的情况下）