jcaptche使用例子

为什么80%的码农都做不了架构师？>>>   

 

spring管理类

<?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"/>

<constructor-arg type="int" index="3" value="75000"/>

</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>aabbccddeefgghhkkmnnooppqqsstuuvvwxxyyzz</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>26</value>

</constructor-arg>

<!--最大字体-->

<constructor-arg index="1">

<value>34</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>32</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>110</value>

</constructor-arg>

<!--背景高度-->

<constructor-arg index="1">

<value>50</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="colorBlack"/>

</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="colorBlack" class="java.awt.Color">

<constructor-arg type="int" index="0">

<value>50</value>

</constructor-arg>

<constructor-arg type="int" index="1">

<value>50</value>

</constructor-arg>

<constructor-arg type="int" index="2">

<value>50</value>

</constructor-arg>

</bean>

</beans>

 

pom.xml需要配置第三方的jar包

 

<repositories>

<repository>

<id>atlassian</id>

<name>atlassian</name>

<url>http://maven.jahia.org/maven2/</url>

</repository>

</repositories>

 

maven

<dependency>

<groupId>com.octo.captcha</groupId>

<artifactId>jcaptcha</artifactId>

<version>1.0</version>

</dependency>

 

 

生成图片

@Controller

public class JCaptcheImg {

 

 

@Autowired

private ImageCaptchaService imageCaptchaService;

 

@RequestMapping("/img")

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) {

e.printStackTrace();

}

}

 

 

}

 

前端调用

<input type="text" id="captcha" name="captcha" maxlength="4" /> <img

src="img.do" onclick="this.src='img.do?d='+new Date().getTime()" />

 

后台校验

public class TestTemplate {

 

@Autowired

private ImageCaptchaService imageCaptchaService;

 

@RequestMapping("/login.do")

public void Login( String captcha, HttpServletRequest request) {

Boolean result = Boolean.FALSE;

 

Boolean isResponseCorrect = imageCaptchaService.validateResponseForID(request.getSession().getId(), captcha);

 

if (isResponseCorrect){

 

}else{

 

}

 

}

}

转载于:https://my.oschina.net/xpbob/blog/728166