使用谷歌kaptcha框架生成验证码
引入依赖
<dependency><groupId>com.github.axet</groupId><artifactId>kaptcha</artifactId><version>0.0.9</version></dependency>配置类
package com.xxxx.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;/ * 验证码配置类 */@Configurationpublic 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; }}controller
package com.xxxx.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;/ * 验证码 */@RestControllerpublic class CaptchaController {@Autowiredprivate 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 jpegresponse.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);//将验证码文本内容放入sessionrequest.getSession().setAttribute("captcha",text);System.out.println("session:"+request.getSession().getAttribute("captcha"));//根据文本验证码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，格式为jpgImageIO.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 --------------------------}}测试
