14.登录验证码

1.demo-admin模块导入依赖

        
        
            com.github.axet
            kaptcha
            0.0.9
        

2.创建kaptcha配置类

package com.lvxk.demo.admin.config;

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;

/**
 * KaptchaConfig
 * Description: 
* date: 2020/5/5 15:17
* * @author lvxk
* @since JDK 1.8 */ @Configuration public class KaptchaConfig { @Bean public DefaultKaptcha producer() { Properties properties = new Properties(); properties.put("kaptcha.border", "no"); properties.put("kaptcha.textproducer.font.color", "black"); properties.put("kaptcha.textproducer.char.space", "5"); Config config = new Config(properties); DefaultKaptcha defaultKaptcha = new DefaultKaptcha(); defaultKaptcha.setConfig(config); return defaultKaptcha; } }

3.创建controller,编写获取验证码接口

package com.lvxk.demo.admin.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.apache.tomcat.util.http.fileupload.IOUtils;
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 javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * SysLoginController 获取验证码
 * Description: 
* date: 2020/5/5 15:19
* * @author lvxk
* @since JDK 1.8 */ @RestController @RequestMapping("kaptcha") @Api(tags = "验证码相关") public class SysLoginController { @Autowired private Producer producer; @GetMapping("code") @ApiOperation(value = "获取验证码(5位)") public void captha(HttpServletResponse response, HttpServletRequest request) throws IOException { response.setHeader("Cache-Control","no-store,no-cache"); response.setContentType("image/jpeg"); //生成文字验证码 String text = producer.createText(); //生成图片验证码 BufferedImage image = producer.createImage(text); //保存验证码到session中 request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY,text); ServletOutputStream out = response.getOutputStream(); ImageIO.write(image,"jpg",out); IOUtils.closeQuietly(out); } }

4.验证测试

image.png

你可能感兴趣的:(14.登录验证码)