SpringMVC中使用Jcaptcha实现校验码验证

SpringMVC中使用Jcaptcha实现校验码验证：http://www.tuicool.com/articles/rMzAFj

 

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

注：请按需对需要排除的依赖进行增减

<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>

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()"/>

 

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;

  }



}