SpringBoot和Vue实现用户个人信息展示与保存与集成JWT——基于SpringBoot和Vue的后台管理系统项目系列博客（十四）
package com.ironmanjay.springboot.config.Interceptor;
import cn.hutool.core.util.StrUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.ironmanjay.springboot.common.Constants;
import com.ironmanjay.springboot.entity.User;
import com.ironmanjay.springboot.exception.ServiceException;
import com.ironmanjay.springboot.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class JwtInterceptor implements HandlerInterceptor {
@Autowired
private IUserService userService;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String token = request.getHeader("token");
// 如果不是映射到方法直接通过
if (!(handler instanceof HandlerMethod)) {
return true;
}
// 执行认证
if (StrUtil.isBlank(token)) {
throw new ServiceException(Constants.CODE_401, "无token，请重新登录");
}
// 获取 token 中的 userId
String userId;
try {
userId = JWT.decode(token).getAudience().get(0);
} catch (JWTDecodeException j) {
throw new ServiceException(Constants.CODE_401, "token验证失败，请重新登录");
}
// 根据token中的userId查询数据库
User user = userService.getById(userId);
if (user == null) {
throw new ServiceException(Constants.CODE_401, "用户不存在，请重新登录");
}
// 用户密码加签验证token
JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(user.getPassword())).build();
try {
jwtVerifier.verify(token); // 验证token
} catch (JWTVerificationException e) {
throw new ServiceException(Constants.CODE_401, "token验证失败，请重新登录");
}
return true;
}
}