1. 添加依赖
- <dependency>
- <groupId>com.GitHub.axet</groupId>
- <artifactId>kaptcha</artifactId>
- <version>0.0.9</version>
- </dependency>
2. 添加配置
在 config 包下创建一个 kaptcha 配置类, 配置验证码的一些生成属性. 代码:
- import java.util.Properties;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.annotation.Configuration;
- import com.google.code.kaptcha.impl.DefaultKaptcha;
- import com.google.code.kaptcha.util.Config;
- @Configuration
- public class KaptchaConfig {
- @Bean
- public DefaultKaptcha producer() {
- Properties properties=new Properties();
- properties.put("kaptercha.border", "no");
- properties.put("kaptercha.textproducer.font.color", "black");
- properties.put("kaptercha.textproducer.char.space", "5");
- Config config=new Config(properties);
- DefaultKaptcha defaultKaptcha=new DefaultKaptcha();
- defaultKaptcha.setConfig(config);
- return defaultKaptcha;
- }
- }
3. 生成代码
- import java.awt.image.BufferedImage;
- import java.io.IOException;
- import javax.imageio.ImageIO;
- import javax.servlet.ServletException;
- import javax.servlet.ServletOutputStream;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.web.bind.annotation.GetMapping;
- import org.springframework.Web.bind.annotation.RestController;
- import com.google.code.kaptcha.Constants;
- import com.google.code.kaptcha.Producer;
- import com.louis.mango.common.utils.IOUtils;
- @RestController
- public class SysLoginController {
- @Autowired
- private Producer producer;
- @GetMapping("kaptcha.jpg")
- public void kaptcha(HttpServletResponse response,HttpServletRequest request) throws ServletException,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
- request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, text);
- ServletOutputStream out=response.getOutputStream();
- ImageIO.write(image, "jpg", out);
- // 用到 IO 工具包控制开关
- IOUtils.closeQuietly(out);
- }
- }
- 1
来源: http://www.bubuko.com/infodetail-3462031.html