Spring与jcaptcha集成
Spring与jcaptcha集成
博客分类：
J2ee
需求：
验证码非常常见，那么在spring中使用jcaptcha进行认证那么需要集成
实现：
mvn：
Xml代码 收藏代码
<!-- code check captcha start -->
<dependency>
<groupId>com.octo.captcha</groupId>
<artifactId>jcaptcha</artifactId>
<version>1.0</version>
</dependency>
<!-- code check captcha end -->
一般仓库中没有对应的jar，比如imaging-01012005.jar那么需要手动添加仓库
Xml代码 收藏代码
<repository>
<id>atlassian</id>
<name>atlassian</name>
<url>http://maven.jahia.org/maven2</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
基于注解mvc，那么图片的请求路径为Controller，流程为请求path:/anon/getcode产生验证码
这样spring的配置信息为：
Xml代码 收藏代码
<context:component-scan base-package="com.someabcd.csr" />
<!-- check code start -->
<bean id="captchaService"
class="com.octo.captcha.service.multitype.GenericManageableCaptchaService">
<description>验证码服务</description>
<constructor-arg index="0">
<ref bean="com.someabcd.csr.web.crsCaptchaEngine" />
</constructor-arg>
<constructor-arg index="1">
<value>300</value>
</constructor-arg><!--超时时间 秒 -->
<constructor-arg index="2">
<value>20000</value>
</constructor-arg><!--最大并发数 -->
<constructor-arg index="3">
<value>20000</value>
</constructor-arg>
</bean>
com.someabcd.csr.web.crsCaptchaEngine类为：
Java代码 收藏代码
@Component("com.someabcd.csr.web.crsCaptchaEngine")
public class CSRCaptchaEngine extends ListImageCaptchaEngine {
@Override
protected void buildInitialFactories() {
int minWordLength = 4;
int maxWordLength = 5;
int fontSize = 50;
int imageWidth = 152;
int imageHeight = 100;
WordGenerator wordGenerator = new RandomWordGenerator(
"0123456789abcdefghijklmnopqrstuvwxyz");
TextPaster randomPaster = new DecoratedRandomTextPaster(minWordLength,
maxWordLength, new RandomListColorGenerator(new Color[] {
new Color(23, 170, 27), new Color(220, 34, 11),
new Color(23, 67, 172) }), new TextDecorator[] {});
BackgroundGenerator background = new UniColorBackgroundGenerator(
imageWidth, imageHeight, Color.white);
FontGenerator font = new RandomFontGenerator(fontSize, fontSize,
new Font[] { new Font("nyala", Font.BOLD, fontSize),
new Font("Bell MT", Font.PLAIN, fontSize),
new Font("Credit valley", Font.BOLD, fontSize) });
ImageDeformation postDef = new ImageDeformationByFilters(
new ImageFilter[] {});
ImageDeformation backDef = new ImageDeformationByFilters(
new ImageFilter[] {});
ImageDeformation textDef = new ImageDeformationByFilters(
new ImageFilter[] {});
WordToImage word2image = new DeformedComposedWordToImage(font,
background, randomPaster, backDef, textDef, postDef);
addFactory(new GimpyFactory(wordGenerator, word2image));
}
}
处理请求的Controller：
Java代码 收藏代码
@Controller
@RequestMapping("anon")
public class AnonController {
@Autowired
private GenericManageableCaptchaService captchaService;
@RequestMapping(value = "/getcode", method = RequestMethod.GET)
public void getCode(HttpServletRequest httpServletRequest,
HttpServletResponse httpServletResponse) {
byte[] captchaChallengeAsJpeg = null;
// 输出jpg的字节流
ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
try {
String captchaId = httpServletRequest.getSession().getId();
BufferedImage challenge = (BufferedImage) captchaService
.getChallengeForID(captchaId,
httpServletRequest.getLocale());
// a jpeg encoder
JPEGImageEncoder jpegEncoder = JPEGCodec
.createJPEGEncoder(jpegOutputStream);
jpegEncoder.encode(challenge);
captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
// flush it in the response
httpServletResponse.setHeader("Cache-Control", "no-store");
httpServletResponse.setHeader("Pragma", "no-cache");
httpServletResponse.setDateHeader("Expires", 0);
httpServletResponse.setContentType("image/jpeg");
ServletOutputStream responseOutputStream = httpServletResponse
.getOutputStream();
responseOutputStream.write(captchaChallengeAsJpeg);
responseOutputStream.flush();
responseOutputStream.close();
} catch (Exception e) {
try {
httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
} catch (IOException e1) {
e1.printStackTrace();
}
return;
}
}
}
验证码的显示：
Java代码 收藏代码
<tr>
<td colspan="2" align="center">
<img
src="${basePath}anon/getcode"
onclick="this.src='${basePath}anon/getcode?d='+new Date()*1" width="160" height="30"/>
</td>
</tr>
<tr>
<td height="40" align="right">
<strong>
验证码：
</strong>
</td>
<td>
<input name="code" type="text" id="code" vld="{required:true}" class="input"/>
</td>
</tr>
验证码验证代码块：
Java代码 收藏代码
Boolean isCorrect = Boolean.FALSE;
String captchaId = request.getSession().getId();
String code = request.getParameter("code");
try {
isCorrect = captchaService.validateResponseForID(captchaId,
code);
if (!isCorrect) {
log.info("check code error!");
return "usr/tologin";
}
} catch (Exception e) {
log.error(e.getMessage());
}
备注：
可以把CaptchaEngine也配置的配置文件中，好处是可以随时修改，缺点是20%的事情缺耗费了80%时间，且这20%不重要