• Spring中使用Jcaptcha实现校验码验证


    本文将使用Jcaptcha实现校验码验证,并演示在Spring/SpringMVC环境下的使用方法。

    1. maven依赖

    <dependency>
      <groupId>com.octo.captcha</groupId>
      <artifactId>jcaptcha-all</artifactId>
      <version>1.0-RC6</version>
      <exclusions>
        <exclusion>
          <groupId>quartz</groupId>
          <artifactId>quartz</artifactId>
        </exclusion>
        <exclusion>
          <groupId>commons-dbcp</groupId>
          <artifactId>commons-dbcp</artifactId>
        </exclusion>
        <exclusion>
          <groupId>commons-pool</groupId>
          <artifactId>commons-pool</artifactId>
          </exclusion>
        <exclusion>
          <groupId>hsqldb</groupId>
          <artifactId>hsqldb</artifactId>
        </exclusion>
        <exclusion>
          <groupId>net.sf.ehcache</groupId>
          <artifactId>ehcache</artifactId>
        </exclusion>
        <exclusion>
          <groupId>concurrent</groupId>
          <artifactId>concurrent</artifactId>
        </exclusion>
        <exclusion>
          <groupId>org.springframework</groupId>
          <artifactId>spring</artifactId>
        </exclusion>
        <exclusion>
          <groupId>xerces</groupId>
          <artifactId>xercesImpl</artifactId>
        </exclusion>
        <exclusion>
          <groupId>xerces</groupId>
          <artifactId>xmlParserAPIs</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

    注:请按需对需要排除的依赖进行增减

    2. 需要将Jcaptcha的Bean加入Spring管理,故新增Spring-Jcaptcha的配置文件。web.xml中

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath*:applicationContext.xml
            classpath*:applicationContext-captcha.xml
        </param-value>
    </context-param>

    3. applicationContext-captcha.xml的内容

    <?xml version="1.0" encoding="UTF-8" ?>
    <beans xmlns="http://www.springframework.org/schema/beans" 
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
      default-lazy-init="true">
    
      <bean id="captchaService" class="com.octo.captcha.service.multitype.GenericManageableCaptchaService">
        <constructor-arg index="0" ref="imageEngine" />
        <constructor-arg type="int" index="1" value="180" />
        <constructor-arg type="int" index="2" value="100000" />
      </bean>
    
      <bean id="imageEngine" class="com.octo.captcha.engine.GenericCaptchaEngine">
        <constructor-arg index="0">
          <list>
            <ref bean="captchaFactory" />
          </list>
        </constructor-arg>
      </bean>
    
      <bean id="captchaFactory" class="com.octo.captcha.image.gimpy.GimpyFactory">
        <constructor-arg>
          <ref bean="wordgen" />
        </constructor-arg>
        <constructor-arg>
          <ref bean="wordtoimage" />
        </constructor-arg>
      </bean>
    
      <bean id="wordgen" class="com.octo.captcha.component.word.wordgenerator.RandomWordGenerator">
        <!--可选字符-->
        <constructor-arg>
          <value>
            0123456789abcdefghijklmnopqrstuvwxyz
          </value>
        </constructor-arg>
      </bean>
    
      <bean id="wordtoimage" class="com.octo.captcha.component.image.wordtoimage.ComposedWordToImage">
        <constructor-arg index="0">
          <ref bean="fontGenRandom" />
        </constructor-arg>
        <constructor-arg index="1">
          <ref bean="backGenUni" />
        </constructor-arg>
        <constructor-arg index="2">
          <ref bean="decoratedPaster" />
        </constructor-arg>
      </bean>
    
      <bean id="fontGenRandom" class="com.octo.captcha.component.image.fontgenerator.RandomFontGenerator">
        <!--最小字体-->
        <constructor-arg index="0">
          <value>20</value>
        </constructor-arg>
        <!--最大字体-->
        <constructor-arg index="1">
          <value>20</value>
        </constructor-arg>
        <constructor-arg index="2">
          <list>
            <bean class="java.awt.Font">
              <constructor-arg index="0">
                <value>Arial</value>
              </constructor-arg>
              <constructor-arg index="1">
                <value>0</value>
              </constructor-arg>
              <constructor-arg index="2">
                <value>20</value>
              </constructor-arg>
            </bean>
          </list>
        </constructor-arg>
      </bean>
    
      <bean id="backGenUni" class="com.octo.captcha.component.image.backgroundgenerator.UniColorBackgroundGenerator">
        <!--背景宽度-->
        <constructor-arg index="0">
          <value>80</value>
        </constructor-arg>
        <!--背景高度-->
        <constructor-arg index="1">
          <value>32</value>
        </constructor-arg>
      </bean>
    
      <bean id="decoratedPaster" class="com.octo.captcha.component.image.textpaster.DecoratedRandomTextPaster">
        <!--最大字符长度-->
        <constructor-arg type="java.lang.Integer" index="0">
          <value>4</value>
        </constructor-arg>
        <!--最小字符长度-->
        <constructor-arg type="java.lang.Integer" index="1">
          <value>4</value>
        </constructor-arg>
        <!--文本颜色-->
        <constructor-arg index="2">
          <ref bean="colorGen" />
        </constructor-arg>
      <!--文本混淆-->
    <constructor-arg index="3">
    <list>
    <!--<ref bean="baffleDecorator"/>-->
    </list>
    </constructor-arg>
    </bean>
    
    <bean id="baffleDecorator" class="com.octo.captcha.component.image.textpaster.textdecorator.BaffleTextDecorator">
    <constructor-arg type="java.lang.Integer" index="0">
    <value>1</value>
    </constructor-arg>
    <constructor-arg type="java.awt.Color" index="1">
    <ref bean="colorWrite" />
    </constructor-arg>
    </bean>
    
    <bean id="colorGen" class="com.octo.captcha.component.image.color.SingleColorGenerator">
    <constructor-arg type="java.awt.Color" index="0">
    <ref bean="colorDimGrey" />
    </constructor-arg>
    </bean>
    
    <bean id="colorWrite" class="java.awt.Color">
    <constructor-arg type="int" index="0">
    <value>255</value>
    </constructor-arg>
    <constructor-arg type="int" index="1">
    <value>255</value>
    </constructor-arg>
    <constructor-arg type="int" index="2">
    <value>255</value>
    </constructor-arg>
    </bean>
    
    <bean id="colorDimGrey" class="java.awt.Color">
    <constructor-arg type="int" index="0">
    <value>105</value>
    </constructor-arg>
    <constructor-arg type="int" index="1">
    <value>105</value>
    </constructor-arg>
    <constructor-arg type="int" index="2">
    <value>105</value>
    </constructor-arg>
    </bean>
    </beans>

    4. 服务端生成校验码

    package personal.hutao.captcha;
    
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    
    import javax.imageio.ImageIO;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import com.octo.captcha.service.image.ImageCaptchaService;
    
    @Controller
    @RequestMapping("/captcha")
    public class JcaptchaImageCreater {
      
      private Logger logger = LoggerFactory.getLogger(getClass());
      
      @Autowired
      private ImageCaptchaService imageCaptchaService;
      
      @RequestMapping
      public void handleRequest(HttpServletRequest request, HttpServletResponse response) {
        try {
          ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
          String captchaId = request.getSession().getId();
          BufferedImage challenge = imageCaptchaService.getImageChallengeForID(captchaId, request.getLocale());
    
          response.setHeader("Cache-Control", "no-store");
          response.setHeader("Pragma", "no-cache");
          response.setDateHeader("Expires", 0L);
          response.setContentType("image/jpeg");
          
          ImageIO.write(challenge, "jpeg", jpegOutputStream);
          byte[] captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
    
          ServletOutputStream respOs = response.getOutputStream();
          respOs.write(captchaChallengeAsJpeg);
          respOs.flush();
          respOs.close();
        } catch (IOException e) {
          logger.error("generate captcha image error: {}", e.getMessage());
        }
      }
    
    }

    5. 页面调用

    <input type="text" id="captcha" name="captcha" maxlength="4" />
    <img src="captcha" onclick="this.src='captcha?d='+new Date().getTime()"/>

    如图:

    6. 提交登录表单后,校验

    package personal.hutao.controller;
    
    import javax.servlet.http.HttpServletRequest;
    
    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.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    import com.octo.captcha.service.image.ImageCaptchaService;
    
    @RequestMapping("/login")
    @Controller
    public class LoginController {
      
      @Autowired
      private ImageCaptchaService imageCaptchaService;
      
      @RequestMapping(value = "/doLogin", method = RequestMethod.POST)
      @ResponseBody
      public Boolean login(String username, String password, String captcha, HttpServletRequest request) {
        Boolean result = Boolean.FALSE;
        
        Boolean isResponseCorrect = imageCaptchaService.validateResponseForID(request.getSession().getId(), captcha);
        if (isResponseCorrect) {
          // 继续校验用户名密码等..
        }
        
        return result;
      }
    
    }
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  • 原文地址:https://www.cnblogs.com/yhtboke/p/5620888.html
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