添加 kaptcha-2.3.2.jar
springMvc中注册
<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.textproducer.font.size">30</prop>
<prop key="kaptcha.textproducer.font.names">宋体,楷体,微软雅黑</prop>
<!--<prop key="kaptcha.textproducer.char.string">拉三等奖水电费和煽风点火收到货付款</prop> 默认为abcde2345678gfynmnpwx-->
<prop key="kaptcha.textproducer.char.length">4</prop>
<prop key="kaptcha.image.width">110</prop>
<prop key="kaptcha.image.height">35</prop>
<prop key="kaptcha.session.key">valicode</prop>
<prop key="kaptcha.noise.impl">com.google.code.kaptcha.impl.NoNoise</prop>
<!-- <prop key="kaptcha.obscurificator.impl">com.google.code.kaptcha.impl.ShadowGimpy</prop> -->
</props>
</constructor-arg>
</bean>
</property>
</bean>
jsp
<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML>
<html>
<head>
<script src="<%=basePath%>resources/js/jquery-3.1.1.min.js"></script>
<script type="text/javascript">
function checkmcode(){
var mcode = $("#mcode").val();
$.ajax({
/* async : false,
cache : false, */
type : ‘POST‘,
url : ‘<%=basePath %>/kaptcha/checkmCode‘,// 请求的action路径
data:{"mcode":mcode},//参数
dataType: "json",
success : function(data){
if(data.success){
$("#searchResult").html(data.msg);
}else{
$("#searchResult").html("出现错误：" + data.msg);
}
},
error: function(jqXHR){
alert("发生错误：" + jqXHR.status);
},
});
}
</script>
<base href="<%=basePath%>">
<title>My JSP ‘kaptcha_jsp.jsp‘ starting page</title>
</head>
<body>
验证码:
<input id="mcode" name="mcode" value="" class="hst2" style="vertical-align:middle"/>
<button onclick="checkmcode()" >验证</button>
<img id="img" style="vertical-align:middle" alt="验证码" src="<%=basePath %>kaptcha/getKaptchaImage"
onclick="this.src=‘<%=basePath %>kaptcha/getKaptchaImage?e=‘+new Date()"/>
<img id="mcodecheck" src="" alt="" style="vertical-align:middle"/>
<p id="searchResult"></p>
</body>
</html>
controller
package com.dr.controller;
import java.awt.image.BufferedImage;
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.json.JSONException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import com.dr.domain.Log;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
@Controller
@RequestMapping("kaptcha")
public class Kaptcha {
@Autowired
private Producer captchaProducer;
@RequestMapping("input")
public String input(){
return "kaptcha_jsp";
}
@RequestMapping("getKaptchaImage")
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("******************验证码是: " + code + "******************");
response.setDateHeader("Expires", 0);
response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
response.setHeader("Pragma", "no-cache");
response.setContentType("image/jpeg");
String capText = captchaProducer.createText();
session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
BufferedImage bi = captchaProducer.createImage(capText);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(bi, "jpg", out);
try {
out.flush();
} finally {
out.close();
}
return null;
}
@RequestMapping(value="checkmCode",produces = {"text/javascript;charset=UTF-8"},method=RequestMethod.POST)
public @ResponseBody String checkCode(HttpServletRequest request,String mcode) throws JSONException{
System.out.println("要校验的验证码:"+mcode);
JsonObject js=new JsonObject();
Log log=new Log();
if(((String)request.getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY)).equals(mcode)){
System.out.println("true");
log.setMsg("成功");
log.setSuccess(true);
js.addProperty("msg","成功");
js.addProperty("success",true);
}else {
log.setMsg("失败");
log.setSuccess(false);
js.addProperty("msg","失败");
js.addProperty("success",false);
}
Gson gson=new Gson();
System.out.println( gson.toJson(log));
System.out.println( js.toString());
/*return gson.toJson(log);*/
return js.toString();
}
}
时间： 2024-10-12 17:34:45