SpringBoot使用Kaptcha验证码

Kaptcha 是一个可高度配置的实用验证码生成工具。个人认为还是挺好用的，虽然现有更加安全的验证方式。

此次是使用springboot+ssm，使用maven管理。直接上步骤：

1. pom文件添加jar包依赖：

   		
   		
      	
               com.github.penggle
               kaptcha
               2.3.2
           

    

2. 配置Kaptcha验证码的样式：在src/main/resources编写一个kaptchaXML.xml（文件名自创）

   
   
   
       
           
               
                   
                                               
                             
                           150  
                             
                           40  
                             
                           0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ  
                             
                           5  
                             
                           no  
                             
                           105,179,90  
                             
                           1  
                             
                           black  
                             
                           30  
                             
                           微软雅黑  
                             
                           black  
                             
                           5  
                             
                           com.google.code.kaptcha.impl.ShadowGimpy 
                           
                       
                   
               
           
       
   
   
   

    

3. 在启动类用@ImportResource来导入xml配置文件

   @SpringBootApplication
   @ImportResource(locations = { "classpath:KaptchaXML.xml" })
   @MapperScan("com.p.mapper")
   public class MyPApplication {
   
   	public static void main(String[] args) {
   		SpringApplication.run(MyPApplication.class, args);
   	}
   
   }

    

4. 生成验证码

   package com.p.controller;
   
   import java.awt.image.BufferedImage;
   import java.io.ByteArrayOutputStream;
   import javax.imageio.ImageIO;
   import javax.servlet.ServletOutputStream;
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   import javax.servlet.http.HttpSession;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Controller;
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RequestParam;
   import org.springframework.web.bind.annotation.ResponseBody;
   
   import com.google.code.kaptcha.impl.DefaultKaptcha;
   
   @Controller
   @RequestMapping("/code")
   public class Codecontroller {
   	
   	
   	
   	@Autowired
   	private DefaultKaptcha captchaProducer;
   	/**  
   	 * @Title: defaultKaptcha  
   	 * @Description: 生成验证码，并存到session中  
   	 * @param @param httpServletRequest
   	 * @param @param httpServletResponse
   	 * @param @throws Exception    参数  
   	 * @return void    返回类型  
   	 * @throws  
   	 */  
   	 
   	@RequestMapping("/defaultKaptcha") 
       public void defaultKaptcha(HttpServletRequest httpServletRequest,HttpServletResponse httpServletResponse) throws Exception{  
               byte[] captchaChallengeAsJpeg = null;    
                ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();    
                try {    
                //生产验证码字符串并保存到session中  
                String createText = captchaProducer.createText();  
                //打印验证码
                System.out.println(createText);
                httpServletRequest.getSession().setAttribute("code", createText);  
                //使用生产的验证码字符串返回一个BufferedImage对象并转为byte写入到byte数组中  
                BufferedImage challenge = captchaProducer.createImage(createText);  
                ImageIO.write(challenge, "jpg", jpegOutputStream);  
                } catch (IllegalArgumentException e) {    
                    httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);    
                    return;    
                }   
                
                //定义response输出类型为image/jpeg类型，使用response输出流输出图片的byte数组  
                captchaChallengeAsJpeg = jpegOutputStream.toByteArray();    
                httpServletResponse.setHeader("Cache-Control", "no-store");    
                httpServletResponse.setHeader("Pragma", "no-cache");    
                httpServletResponse.setDateHeader("Expires", 0);    
                httpServletResponse.setContentType("image/jpeg");    
                ServletOutputStream responseOutputStream = httpServletResponse.getOutputStream();    
                responseOutputStream.write(captchaChallengeAsJpeg);    
                responseOutputStream.flush();    
                responseOutputStream.close();    
       }  
   
   	
   }
   

    

5. 在前端使用：

   	  
   
   		    
   
   		           
   
   					  
   
   					    用户名
   					    
   
   					      
   					    
   					  
   					  
   
   					    密   码
   					    
   
   					      
   					    
   					  
   					   
   
   						    验证码 				    		    
   					      
   					   	  
   					      
   					  
   		
   					  
   
   					    
   
   					      登陆	     
   					    
   					  
   					  
   				

    

6. 效果图样

最后就此完成Kaptcha生成验证码的整个过程了。