标签：
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(); } }
标签：
原文地址：http://www.cnblogs.com/nrev/p/5950431.html
