根据请求头区分请求是pc端还是app端工具类 实现app和pc统一登录逻辑

package com.xiaokun.device_status.utils;

import javax.servlet.http.HttpServletRequest;
public class UserAgentUtil {

    public void index(HttpServletRequest request) {
        String ua = request.getHeader("User-Agent");
        if (UserAgentUtil.checkAgentIsMobile(ua)) {
            System.out.println("移动端");
        } else {
            System.out.println("PC端");
        }
    }

    /**
     * 判断User-Agent 是不是来自于手机
     * @param ua
     * @author Leemeea
     * @return
     */
    public static boolean checkAgentIsMobile(String ua) {
        String[] deviceArray = new String[] { "android", "iPhone", "ipod",
                "ipad", "blackberry", "ucweb", "windows phone" };
        if (ua == null) {
            return false;
        }
        ua = ua.toLowerCase();
        for (String string : deviceArray) {
            if (ua.indexOf(string) > 0) {
                return true;
            }
        }
        return false;
    }
}

 

 

登录接口逻辑

@Override
    public String findByLoginDto(LoginDto loginDto, HttpServletResponse response, HttpServletRequest request, String ip) {
        UserToken userToken = new UserToken();
        String token = null;
        /**检查数据库用户是否存在*/
        User user = loginMapper.getUser(loginDto.getAccountNumber(),loginDto.getPassword());
        if (user == null) return null;

        byte[] data = user.getAccountNumber().getBytes();
        byte[] signed = sign.sign(data);
        token = Base64Encoder.encode(signed);

        String userAgent = request.getHeader(HttpHeaders.USER_AGENT);
        /**标识是app端还是pc端*/
        String flag = UserAgentUtil.checkAgentIsMobile(userAgent) ? "app" : "pc";

        /**存进redis的对象*/
        userToken.setUserId(user.getUserId());
        userToken.setIp(ip);
        userToken.setToken(token+user.getAccountNumber()+flag);
        userToken.setAccountNumber(user.getAccountNumber());
        userToken.setUserAgent(userAgent);
        String result = JSONObject.toJSON(userToken).toString();    //用户token的转字符串

        /**第二次登录，刷新token，并删除之前的用户token  以登录的唯一账号+登录设备端  作为唯一key*/
        if (redisTemplate.hasKey(user.getAccountNumber() + flag)) {
            redisTemplate.delete(user.getAccountNumber() + flag);
            redisTemplate.opsForValue().set(user.getAccountNumber() + flag,result,7, TimeUnit.DAYS);
        }else {
            redisTemplate.opsForValue().set(user.getAccountNumber() + flag,result,7, TimeUnit.DAYS);
        }

return userToken.getToken();
    }

 

 

拦截器逻辑

@Override
    public void findUser(String token, String ip,String status) {
        Assert.notEmpty(token,"token为空,用户未登录");

        /**切割token获得用户唯一key*/
        String[] split = token.split("=");
        String accountNumber = split[split.length - 1];     //13129137992pc or13129137992app
        boolean flag;   //标识redis里有没有那个用户的key
//        String userAgentFlag = UserAgentUtil.checkAgentIsMobile(status) ? "app":"pc";    //标识前端请求头是pc还是app
        flag = redisTemplate.hasKey(accountNumber);

        String s = "";  //redis里的用户对象字符串
        if (flag) {
            s = redisTemplate.opsForValue().get(accountNumber).toString();
        }else {
            throw new RuntimeException("用户登录凭证已失效,请重新登录");
        }
        UserToken userToken = JSON.parseObject(s, UserToken.class);     //redis里的用户token对象
        String tokenIp = userToken.getIp();
        String userAgent = userToken.getUserAgent();

        if (!status.equals(userAgent) || !ip.equals(tokenIp)) {
            throw new RuntimeException("有人登录您的账号,请重新登录");
        }


        /**再一次校验存在redis里的用户对象在数据库中查不查的到用户*/
        User user = null;
        if (userToken != null) {
            user = loginMapper.getUserByUserId(userToken.getUserId());
        }
        if (user == null) {
            throw new RuntimeException("用户不存在");
        }
    }