和shiro整合后,使用shiro的session管理,shiro提供sessionDao操作 会话数据。
配置sessionManager
注入到securityManager
----------------------------------------验证码(自定义验证器)---------------------------------
思路
shiro使用FormAuthenticationFilter进行表单认证,验证校验的功能应该加在FormAuthenticationFilter中,在认证之前进行验证码校验。
需要写FormAuthenticationFilter的子类,继承FormAuthenticationFilter,改写它的认证方法,在认证之前进行验证码校验。
自定义FormAuthenticationFilter
package cn.qlq.springmvc.shiro; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.shiro.web.filter.authc.FormAuthenticationFilter; public class CustomFormAuthenticationFilter extends FormAuthenticationFilter { //原FormAuthenticationFilter的认证方法 @Override protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception { //在这里进行验证码的校验 //从session获取正确验证码 HttpServletRequest httpServletRequest = (HttpServletRequest) request; HttpSession session =httpServletRequest.getSession(); //取出session的验证码(正确的验证码) String validateCode = (String) session.getAttribute("validateCode"); //取出页面的验证码 //输入的验证和session中的验证进行对比 String randomcode = httpServletRequest.getParameter("randomcode"); if(randomcode!=null && validateCode!=null && !randomcode.equals(validateCode)){ //如果校验失败,将验证码错误失败信息,通过shiroLoginFailure设置到request中 httpServletRequest.setAttribute("shiroLoginFailure", "randomCodeError"); //拒绝访问,不再校验账号和密码 return true; } return super.onAccessDenied(request, response); } }
配置自定义FormAuthenticationFilter
注入到Shiro 的Web过滤器
在login.action对验证错误 进行解析
在登陆页面添加验证码
验证码JSP:validatecode.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.util.Random"%> <%@ page import="java.io.OutputStream"%> <%@ page import="java.awt.Color"%> <%@ page import="java.awt.Font"%> <%@ page import="java.awt.Graphics"%> <%@ page import="java.awt.image.BufferedImage"%> <%@ page import="javax.imageio.ImageIO"%> <% int width = 60; int height = 32; //create the image BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = image.getGraphics(); // set the background color g.setColor(new Color(0xDCDCDC)); g.fillRect(0, 0, width, height); // draw the border g.setColor(Color.black); g.drawRect(0, 0, width - 1, height - 1); // create a random instance to generate the codes Random rdm = new Random(); String hash1 = Integer.toHexString(rdm.nextInt()); System.out.print(hash1); // make some confusion for (int i = 0; i < 50; i++) { int x = rdm.nextInt(width); int y = rdm.nextInt(height); g.drawOval(x, y, 0, 0); } // generate a random code String capstr = hash1.substring(0, 4); //将生成的验证码存入session session.setAttribute("validateCode", capstr); g.setColor(new Color(0, 100, 0)); g.setFont(new Font("Candara", Font.BOLD, 24)); g.drawString(capstr, 8, 24); g.dispose(); //输出图片 response.setContentType("image/jpeg"); out.clear(); out = pageContext.pushBody(); OutputStream strm = response.getOutputStream(); ImageIO.write(image, "jpeg", strm); strm.close(); %>
在filter配置匿名访问验证码jsp(放行验证码JSP)
时间: 2024-11-10 10:43:18