springboot实现图片验证码之kaptcha框架

springboot实现图片验证码之kaptcha框架

1.添加依赖

<dependency>
    <groupId>com.github.axet</groupId>
    <artifactId>kaptcha</artifactId>
    <version>0.0.9</version>
</dependency>

2.编写配置

新建KaptchaConfig.java文件，进行相关参数配置

package com.example.demo.config;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Properties;

@Configuration
public class KaptchaConfig {

    /**
     * 验证码配置
     * @return
     */
    @Bean
    public DefaultKaptcha getDefaultKaptcha(){
        DefaultKaptcha defaultKaptcha=new DefaultKaptcha();
        Properties properties=new Properties();
        //是否有边框
        properties.setProperty(Constants.KAPTCHA_BORDER,"yes");
        //验证码文本颜色
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_COLOR,"red");
        //验证码图片宽度
        properties.setProperty(Constants.KAPTCHA_IMAGE_WIDTH,"160");
        //验证码图片高度
        properties.setProperty(Constants.KAPTCHA_IMAGE_HEIGHT,"60");
        //文本字符大小
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_SIZE,"38");
        //验证码session的值
        properties.setProperty(Constants.KAPTCHA_SESSION_CONFIG_KEY,"kaptchaCode");
        //验证码文本长度
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_LENGTH,"4");
        //字体
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_NAMES, "宋体,楷体,微软雅黑");

        Config config=new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }

}

3.实现接口

package com.example.demo.controller;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.sun.deploy.net.HttpResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

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

@RestController
@RequestMapping("/api")
public class KaptchaController {

    @Autowired
    DefaultKaptcha defaultKaptcha;

    @GetMapping("/getCode")
    public void getCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
        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 text = defaultKaptcha.createText();
        //保存验证码
        request.getSession().setAttribute("vrifyCode",text);
        BufferedImage image=defaultKaptcha.createImage(text);
        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(image,"jpg",out);
        out.flush();
        out.close();
    }
    @GetMapping("/vrifyCode")
    public String vrifyCode(HttpServletRequest request, String code){
        String vrifyCode= (String) request.getSession().getAttribute("vrifyCode");
        if (vrifyCode==null){
            return null;
        }
        if (!vrifyCode.equals(code)){
            return "错误的验证码";
        }else{
            return "验证成功";
        }


    }

}

4.接口验证

使用postman工具进行验证。

1. 获取验证码

http://localhost:8080/api/getCode

2. 校验验证码

http://localhost:8080/api/vrifyCode

通过Postman获取验证码

通过Postman验证验证码-成功

通过Postman验证验证码-失败