Spring集成谷歌验证码

August 14, 2022 4636

添加依赖

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<!-- google kaptcha依赖 -->
<dependency>
  	<groupId>com.github.axet</groupId>
  	<artifactId>kaptcha</artifactId>
  	<version>0.0.9</version>
</dependency>

配置类 CaptchaConfig.java

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package com.boyolo.server.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;

@Configuration
public class CaptchaConfig {

  @Bean
  public DefaultKaptcha defaultKaptcha() {
    //验证码生成器
    DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
    //配置
    Properties properties = new Properties();
    //是否有边框
    properties.setProperty("kaptcha.border", "yes");
    //设置边框颜色
    properties.setProperty("kaptcha.border.color", "105,179,90");
    //边框粗细度，默认为1
    // properties.setProperty("kaptcha.border.thickness","1");
    //验证码
    properties.setProperty("kaptcha.session.key", "code");
    //验证码文本字符颜色 默认为黑色
    properties.setProperty("kaptcha.textproducer.font.color", "blue");
    //设置字体样式
    properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");
    //字体大小，默认40
    properties.setProperty("kaptcha.textproducer.font.size", "30");
    //验证码文本字符内容范围 默认为abced2345678gfynmnpwx
    // properties.setProperty("kaptcha.textproducer.char.string", "");
    //字符长度，默认为5
    properties.setProperty("kaptcha.textproducer.char.length", "4");
    //字符间距 默认为2
    properties.setProperty("kaptcha.textproducer.char.space", "4");
    //验证码图片宽度 默认为200
    properties.setProperty("kaptcha.image.width", "100");
    //验证码图片高度 默认为40
    properties.setProperty("kaptcha.image.height", "40");
    Config config = new Config(properties);
    defaultKaptcha.setConfig(config);
    return defaultKaptcha;
  }
}

CaptchaController

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package com.boyolo.server.controller;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
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;

/**
 * @author renbo
 */
@RestController
public class CaptchaController {

  @Autowired
  private DefaultKaptcha defaultKaptcha;

  @ApiOperation(value = "验证码")
  @GetMapping(value = "/captcha", produces = "image/jpeg")
  public void captcha(HttpServletRequest request, HttpServletResponse response) {
    // 定义response输出类型为image/jpeg类型
    response.setDateHeader("Expires", 0);
    // Set standard HTTP/1.1 no-cache headers.
    response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
    // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
    response.addHeader("Cache-Control", "post-check=0, pre-check=0");
    // Set standard HTTP/1.0 no-cache header.
    response.setHeader("Pragma", "no-cache");
    // return a jpeg
    response.setContentType("image/jpeg");
    //-------------------生成验证码 begin ------------------------
    //获取验证码文本内容
    String text = defaultKaptcha.createText();
    System.out.println("验证码内容：" + text);
    //将验证码放入session中
    request.getSession().setAttribute("captcha", text);
    //根据文本内容创建图形验证码
    BufferedImage image = defaultKaptcha.createImage(text);
    ServletOutputStream outputStream = null;
    try {
      outputStream = response.getOutputStream();
      //输出流输出图片，格式jpg
      ImageIO.write(image, "jpg", outputStream);
      outputStream.flush();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (null != outputStream) {
        try {
          outputStream.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
    //-------------------生成验证码 end --------------------------
  }
}

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