Kaptcha SpringMVC整合教程-java驗證碼

pom.xml

<dependency>
			<groupId>com.google.code.kaptcha</groupId>
			<artifactId>kaptcha</artifactId>
			<version>2.3.2</version>
		</dependency>

spring-context

<bean id="captchaProducer" class="com.google.code.kaptcha.impl.DefaultKaptcha">
		<property name="config">
			<bean class="com.google.code.kaptcha.util.Config">
				<constructor-arg>
					<props>
						<prop key="kaptcha.border">yes</prop>
						<prop key="kaptcha.border.color">105,179,90</prop>
						<prop key="kaptcha.textproducer.font.color">blue</prop>
						<prop key="kaptcha.image.width">125</prop>
						<prop key="kaptcha.image.height">45</prop>
						<prop key="kaptcha.textproducer.font.size">45</prop>
						<prop key="kaptcha.session.key">code</prop>
						<prop key="kaptcha.textproducer.char.length">4</prop>
						<prop key="kaptcha.textproducer.font.names"></prop>
					</props>
				</constructor-arg>
			</bean>
		</property>
	</bean>

Controller

package belief.lottery.web.controller.front;
import java.awt.image.BufferedImage;

import javax.annotation.Resource;
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.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

/**
 * 
 * @author Beleif
 *
 */
@Controller
@RequestMapping("/Captcha")
public class CaptchaController {
	
	@Resource
	private Producer captchaProducer = null;

	@RequestMapping("/captcha.jpg")
	public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {
		HttpSession session = request.getSession();
		String code = (String)session.getAttribute(Constants.KAPTCHA_SESSION_KEY);
		System.out.println("******************驗證碼是: " + code + "******************");
		
		response.setDateHeader("Expires", 0);
		
		// Set standard HTTP/1.1 no-cache headers.
		response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
		
		// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		
		// Set standard HTTP/1.0 no-cache header.
		response.setHeader("Pragma", "no-cache");
		
		// return a jpeg
		response.setContentType("image/jpeg");
		
		// create the text for the image
		String capText = captchaProducer.createText();
		
		// store the text in the session
		session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
		
		// create the image with the text
		BufferedImage bi = captchaProducer.createImage(capText);
		ServletOutputStream out = response.getOutputStream();
		
		// write the data out
		ImageIO.write(bi, "jpg", out);
		try {
			out.flush();
		} finally {
			out.close();
		}
		return null;
	}

}

參考配置

kaptcha.border  是否有邊框  默認爲true  我們可以自己設置yes，no  
kaptcha.border.color   邊框顏色   默認爲Color.BLACK  
kaptcha.border.thickness  邊框粗細度  默認爲1  
kaptcha.producer.impl   驗證碼生成器  默認爲DefaultKaptcha  
kaptcha.textproducer.impl   驗證碼文本生成器  默認爲DefaultTextCreator  
kaptcha.textproducer.char.string   驗證碼文本字符內容範圍  默認爲abcde2345678gfynmnpwx  
kaptcha.textproducer.char.length   驗證碼文本字符長度  默認爲5  
kaptcha.textproducer.font.names    驗證碼文本字體樣式  默認爲new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)  
kaptcha.textproducer.font.size   驗證碼文本字符大小  默認爲40  
kaptcha.textproducer.font.color  驗證碼文本字符顏色  默認爲Color.BLACK  
kaptcha.textproducer.char.space  驗證碼文本字符間距  默認爲2  
kaptcha.noise.impl    驗證碼噪點生成對象  默認爲DefaultNoise  
kaptcha.noise.color   驗證碼噪點顏色   默認爲Color.BLACK  
kaptcha.obscurificator.impl   驗證碼樣式引擎  默認爲WaterRipple  
kaptcha.word.impl   驗證碼文本字符渲染   默認爲DefaultWordRenderer  
kaptcha.background.impl   驗證碼背景生成器   默認爲DefaultBackground  
kaptcha.background.clear.from   驗證碼背景顏色漸進   默認爲Color.LIGHT_GRAY  
kaptcha.background.clear.to   驗證碼背景顏色漸進   默認爲Color.WHITE  
kaptcha.image.width   驗證碼圖片寬度  默認爲200  
kaptcha.image.height  驗證碼圖片高度  默認爲50