Kaptcha验证码
下载kaptcha-2.3.2.jar
http://code.google.com/p/kaptcha/downloads/list
1.spring 配置文件 applicationContext.xml
[html]
<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">no</prop> <prop key="kaptcha.border.color">105,179,90</prop> <prop key="kaptcha.textproducer.font.color">red</prop> <prop key="kaptcha.image.width">250</prop> <prop key="kaptcha.textproducer.font.size">80</prop> <prop key="kaptcha.image.height">90</prop> <prop key="kaptcha.session.key">code</prop> <prop key="kaptcha.textproducer.char.length">4</prop> <prop key="kaptcha.textproducer.font.names">宋体,楷体,微软雅黑</prop> </props> </constructor-arg> </bean> </property> </bean>
2. Controller的实现
package com.controller.common;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
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;
@Controller
@RequestMapping("/")
public class CaptchaImageCreateController {
private Producer captchaProducer = null;
@Autowired
public void setCaptchaProducer(Producer captchaProducer) {
this.captchaProducer = captchaProducer;
}
@RequestMapping("/captcha-image")
public ModelAndView handleRequest
(HttpServletRequest request, HttpServletResponse response) throws Exception {
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
request.getSession().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;
}
}
3. JSP代码
<div class="title"> 用户登录 </div>
<div class="loginbox">
<form id="loginForm" action="${pageContext.request.contextPath}/login" method="post">
<div style="height:40px;">
<label class="tip">登 录 名: </label>
<input name="name" type="text" id="name" class="user-text" value="" />
</div>
<div style="height:40px;">
<label class="tip">密 码： </label>
<input type="password" id="password" name="password" class="user-text" value="" />
</div>
<div style="height:60px;">
<label class="tip">验 证 码: </label>
<input type="text" name="verifyCode" id="verifyCode" class="usertext" value="" onchange="changeVerifyCode();"/>
<img src="captcha-image.jpg" width="110" height="30" id="kaptchaImage"
style="margin-bottom: -13px"/>
</div>
<div style="margin-left:15px">
<input type="submit" class="login-btn" value="登录" />
<input type="reset" class="login-btn" style="margin-left:10px;" value="重置" />
</div>
</form>
</div>
//以下是js文件
<script type="text/javascript" src="static/js/jquery-1.9.1.js"></script>
<script type="text/javascript">
$(function(){
$(‘#kaptchaImage‘).click(function () {
$(this).attr(‘src‘, ‘captcha-image.jpg?‘ + Math.floor(Math.random()*100) );
})
});
//修改验证码触发的函数
function changeVerifyCode(){
var verifyCodeValue = $("#verifyCode").val();
if(verifyCodeValue.replace(/\s/g,"") == "") {
alert("请输入验证码");
}else {
//异步检查验证码是否输入正确
var verifyUrl = "${pageContext.request.contextPath}/checkVerificationCode";
$.ajax({
type:"POST",
url:verifyUrl,
data:{"verifyCode":verifyCodeValue},
success:function(data){
if(data==true) {
//验证码正确，进行提交操作
//alert("输入正确 ！");
}else {
alert("请输入正确的验证码！");
}
},
error:function(e){
alert(e);
}
});
}
}
</script>
?
4.controller中取得校验码验证输入的验证码是否正确
[java] view plaincopyprint?
//验证码
package com.controller.common;
import javax.servlet.http.HttpServletRequest;
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;
@Controller
public class VerifyController {
@RequestMapping(value = "checkVerificationCode")
@ResponseBody
public boolean checkVerificationCode(@RequestParam("verifyCode")String verifyCode,
HttpServletRequest request){
String kaptchaExpected = (String)request.getSession()
.getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
String kaptchaReceived = verifyCode;
if (kaptchaReceived == null || !kaptchaReceived.equalsIgnoreCase(kaptchaExpected))
{
return false;
}
return true;
}
}
5.kaptcha可配置项
kaptcha.border 是否有边框 默认为true 我们可以自己设置yes，no
kaptcha.border.color 边框颜色 默认为Color.BLACK
kaptcha.border.thickness 边框粗细度 默认为1
kaptcha.producer.impl 验证码生成器 默认为DefaultKaptcha
kaptcha.textproducer.impl 验证码文本生成器 默认为DefaultTextCreator
kaptcha.textproducer.char.string 验证码文本字符内容范围 默认为abcde2345678gfynmnpwx
kaptcha.textproducer.char.length 验证码文本字符长度 默认为5
kaptcha.textproducer.font.names 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
kaptcha.textproducer.font.size 验证码文本字符大小 默认为40
kaptcha.textproducer.font.color 验证码文本字符颜色 默认为Color.BLACK
kaptcha.textproducer.char.space 验证码文本字符间距 默认为2
kaptcha.noise.impl 验证码噪点生成对象 默认为DefaultNoise
kaptcha.noise.color 验证码噪点颜色 默认为Color.BLACK
kaptcha.obscurificator.impl 验证码样式引擎 默认为WaterRipple
kaptcha.word.impl 验证码文本字符渲染 默认为DefaultWordRenderer
kaptcha.background.impl 验证码背景生成器 默认为DefaultBackground
kaptcha.background.clear.from 验证码背景颜色渐进 默认为Color.LIGHT_GRAY
kaptcha.background.clear.to 验证码背景颜色渐进 默认为Color.WHITE
kaptcha.image.width 验证码图片宽度 默认为200
kaptcha.image.height 验证码图片高度 默认为50
时间： 2024-12-19 14:38:10