jcaptcha是做图片验证码的,主要说下在springboot 里面的使用方法.
pom.xml里面的配置
xml
<dependency>
<groupId>com.octo.captcha</groupId>
<artifactId>jcaptcha</artifactId>
<version>1.0</version>
</dependency>
两个java类
CaptchaService 处理图片
import com.octo.captcha.component.image.backgroundgenerator.GradientBackgroundGenerator;
import com.octo.captcha.component.image.color.SingleColorGenerator;
import com.octo.captcha.component.image.fontgenerator.RandomFontGenerator;
import com.octo.captcha.component.image.textpaster.NonLinearTextPaster;
import com.octo.captcha.component.image.wordtoimage.ComposedWordToImage;
import com.octo.captcha.component.word.wordgenerator.RandomWordGenerator;
import com.octo.captcha.engine.GenericCaptchaEngine;
import com.octo.captcha.image.gimpy.GimpyFactory;
import com.octo.captcha.service.captchastore.FastHashMapCaptchaStore;
import com.octo.captcha.service.image.DefaultManageableImageCaptchaService;
import com.octo.captcha.service.image.ImageCaptchaService;
import java.awt.*;
public class CaptchaService {
private static class SingletonHolder {
private static ImageCaptchaService imageCaptchaService = new DefaultManageableImageCaptchaService(
new FastHashMapCaptchaStore(),
new GenericCaptchaEngine(
new GimpyFactory[]{new GimpyFactory(
new RandomWordGenerator("123456789ABCE"),
new ComposedWordToImage(
new RandomFontGenerator(20, 20, new Font[]{new Font("Arial", 20, 20)}),
new GradientBackgroundGenerator(90, 30, new SingleColorGenerator(new Color(235, 255, 255)), new SingleColorGenerator(new Color(255, 195, 230))),
new NonLinearTextPaster(4, 4, new Color(11, 11, 11))
)
)}
),
180,
180000,
20000
);
}
private CaptchaService() {
}
public static ImageCaptchaService getInstance() {
return SingletonHolder.imageCaptchaService;
}
}
CaptchaController 处理页面请求
import com.octo.captcha.service.CaptchaServiceException;
import com.smspai.sms.website.config.CaptchaService;
import org.apache.ibatis.annotations.Param;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
@Controller
@RequestMapping("/component")
public class CaptchaController {
// slf4j logger
private final static Logger logger = LoggerFactory.getLogger(CaptchaController.class);
@ResponseBody
@RequestMapping(value = "/captcha") //captcha captchaImage
public void getJCaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {
response.setDateHeader("Expires", 0);
response.setHeader("Cache-Control", "no-cache, must-revalidate");
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
response.setHeader("Pragma", "no-cache");
response.setContentType("image/jpeg");
BufferedImage bi = CaptchaService.getInstance().getImageChallengeForID(request.getSession(true)
.getId());
ServletOutputStream out = response.getOutputStream();
ImageIO.write(bi, "jpg", out);
try {
out.flush();
} finally {
out.close();
}
return;
}
// 经验:@Param("code") String code 这两个名字必须相同,都要叫code,这是绑定的
@ResponseBody
@RequestMapping(value = "/check", method = RequestMethod.POST) // check validate
@ResponseStatus(HttpStatus.OK)
public Object validate(@Param("code") String code, HttpServletRequest request) {
ModelMap modelMap = new ModelMap();
boolean isCaptchaCorrect = false;
try {
isCaptchaCorrect = CaptchaService.getInstance().validateResponseForID(request.getSession().getId(), code.toUpperCase());
// if (isCaptchaCorrect) {
//
// }
} catch (CaptchaServiceException exception) {
logger.debug(">>>>>>>[CaptchaController.validate]:\n " + exception.getMessage());
modelMap.addAttribute("refresh", true);
}
modelMap.addAttribute("success", isCaptchaCorrect);
logger.debug(">>>>>>>[CaptchaController.validate]: \n" + code + ":" + isCaptchaCorrect);
return modelMap;
}
}
页面设置 及 js
<div class="field-container">
<input name="checkcode" type="text" data-placeholder="验证码" placeholder="验证码"/>
<img style="float:left;cursor: pointer;border: 1px solid #ddd;margin-left: 10px;" src="/component/captcha" id="J_captcha" title="点击刷新验证码" border="0" height="30"/>
</div>
检查验证码
$(".field[name=checkcode]").keyup(function (event) {
var _this = $(this);
var val = $.trim(_this.val());
if (val.length == 4) {
$.ajax({
type: 'POST',
dataType: 'json',
url: '/component/check',
data: {
code: val
},
success: function (result) {
if (result.success) {
$(".ccstatus").show();
} else if (result.refresh) {
$("#J_captcha").click();
} else {
$(".ccstatus").hide();
}
},
error: function () {
$(".ccstatus").hide();
}
});
} else {
$(".ccstatus").hide();
}
});
验证码刷新
$("#J_captcha").click(function () {
var _this = $(this);
var ts = new Date().getTime();
_this.attr('src', '/component/captcha?ts=' + ts);
$(".field[name=checkcode]").val('');
$(".field[name=checkcode]").focus();
});
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