SpringBoot登录用户权限拦截器

1. 创建自定义拦截器类并实现 HandlerInterceptor 接口

package com.xgf.online_mall.interceptor;import com.xgf.online_mall.system.domain.User;import lombok.extern.slf4j.Slf4j;import org.springframework.stereotype.Component;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.BufferedWriter;import java.io.FileWriter;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;import java.text.SimpleDateFormat;import java.util.Date;import java.util.logging.SimpleFormatter;@Slf4j@Componentpublic class UserLoginAuthInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { log.info(' ======== UserAuthInterceptor preHandle 登录权限拦截器拦截'); User user = (User) request.getSession().getAttribute('loginUser'); //未登录才判断，登录了直接放行 if(user == null){ //获取访问路径 String address = request.getRequestURI(); log.info('======== 拦截，访问路径 address : {}', address); response.sendRedirect(request.getContextPath() + '/login.html'); return false; /*String address = request.getRequestURI(); log.info('======== 拦截，访问路径 address : {}', address); //不是登录或者注册页面，就直接跳转登录界面 if(!address.contains('login') && !address.contains('register')){//强制到登录页面response.sendRedirect(request.getContextPath() + '/login.html');//设置为false，不访问controllerreturn false; }*/ } //其它模块或者已经登录，就直接放行// log.info('======== 已登录 user = {}', user); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { log.info(' ===== UserAuthInterceptor postHandle'); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { log.info('==== UserAuthInterceptor afterCompletion'); //记录日志 向文件里面写日志 //获取服务器记录日志log文件所存放的目录位置 -- tomcat下的真实路径+log目录 String logdir = request.getServletContext().getRealPath('log'); //路径不存在就创建 Path logdirPath = Paths.get(logdir); if(Files.notExists(logdirPath)){ Files.createDirectories(logdirPath); } //目录存在就将数据[字符]写入 //存放日志的路径+文件名 Path logfile = Paths.get(logdir,'userlog.log'); //logfile.toFile() paths转换为File类型 true以追加的方式写入 BufferedWriter writer = new BufferedWriter(new FileWriter(logfile.toFile(),true)); //获取登录用户信息 User user = (User)request.getSession().getAttribute('loginUser'); //记录user信息，存入日志 writer.write(new SimpleDateFormat('yyyy-MM-dd HH:mm:ss').format(new Date()) + ' >> ' + user +'rn'); writer.flush(); writer.close(); }}

2. 创建WebMvcConfigurer接口实现类，注册并生效自定义的拦截器

import com.xgf.online_mall.constant.PathConstantParam;import com.xgf.online_mall.interceptor.UserLoginAuthInterceptor;import lombok.extern.slf4j.Slf4j;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;import java.util.ArrayList;import java.util.List;@Configuration@Slf4jpublic class LoginConfig implements WebMvcConfigurer { @Autowired private UserLoginAuthInterceptor userLoginAuthInterceptor; /** * addInterceptors方法设置拦截路径 * addPathPatterns：需要拦截的访问路径 * excludePathPatterns：不需要拦截的路径， * String数组类型可以写多个用','分割 * @param registry */ @Override public void addInterceptors(InterceptorRegistry registry){ log.info(' ======== LoginConfig.addInterceptors'); //添加对用户未登录的拦截器，并添加排除项 //error路径，excludePathPatterns排除访问的路径在项目中不存在的时候， //springboot会将路径变成 /error, 导致无法进行排除。 registry.addInterceptor(userLoginAuthInterceptor).addPathPatterns('/**').excludePathPatterns('/js/**', '/css/**', '/img/**', '/plugins/**').excludePathPatterns('/login.html', '/register.html', '/system/user/login', '/system/user/login', '/index').excludePathPatterns('/error'); } }

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