基于小程序的校园二手交易系统设计与实现(源码+lw+部署文档+讲解等)

@IgnoreAuth
@PostMapping(value = "/login")
public R login(String username, String password, String captcha, HttpServletRequest request) {
   UsersEntity user = userService.selectOne(new EntityWrapper<UsersEntity>().eq("username", username));
   if(user==null || !user.getPassword().equals(password)) {
      return R.error("账号或密码不正确");
   }
   String token = tokenService.generateToken(user.getId(),username, "users", user.getRole());
   return R.ok().put("token", token);
}
  @Override
  public String generateToken(Long userid,String username, String tableName, String role) {
    TokenEntity tokenEntity = this.selectOne(new EntityWrapper<TokenEntity>().eq("userid", userid).eq("role", role));
    String token = CommonUtil.getRandomString(32);
    Calendar cal = Calendar.getInstance();   
      cal.setTime(new Date());   
      cal.add(Calendar.HOUR_OF_DAY, 1);
    if(tokenEntity!=null) {
      tokenEntity.setToken(token);
      tokenEntity.setExpiratedtime(cal.getTime());
      this.updateById(tokenEntity);
    } else {
      this.insert(new TokenEntity(userid,username, tableName, role, token, cal.getTime()));
    }
    return token;
  }
/**
 * 权限(Token)验证
 */
@Component
public class AuthorizationInterceptor implements HandlerInterceptor {
    public static final String LOGIN_TOKEN_KEY = "Token";
    @Autowired
    private TokenService tokenService;
  @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    //支持跨域请求
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,request-source,Token, Origin,imgType, Content-Type, cache-control,postman-token,Cookie, Accept,authorization");
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
  // 跨域时会首先发送一个OPTIONS请求，这里我们给OPTIONS请求直接返回正常状态
  if (request.getMethod().equals(RequestMethod.OPTIONS.name())) {
          response.setStatus(HttpStatus.OK.value());
            return false;
        }
        IgnoreAuth annotation;
        if (handler instanceof HandlerMethod) {
            annotation = ((HandlerMethod) handler).getMethodAnnotation(IgnoreAuth.class);
        } else {
            return true;
        }
        //从header中获取token
        String token = request.getHeader(LOGIN_TOKEN_KEY);
        /**
         * 不需要验证权限的方法直接放过
         */
        if(annotation!=null) {
          return true;
        }
        TokenEntity tokenEntity = null;
        if(StringUtils.isNotBlank(token)) {
          tokenEntity = tokenService.getTokenEntity(token);
        }
        if(tokenEntity != null) {
          request.getSession().setAttribute("userId", tokenEntity.getUserid());
          request.getSession().setAttribute("role", tokenEntity.getRole());
          request.getSession().setAttribute("tableName", tokenEntity.getTablename());
          request.getSession().setAttribute("username", tokenEntity.getUsername());
          return true;
        }
    PrintWriter writer = null;
    response.setCharacterEncoding("UTF-8");
    response.setContentType("application/json; charset=utf-8");
    try {
        writer = response.getWriter();
        writer.print(JSONObject.toJSONString(R.error(401, "请先登录")));
    } finally {
        if(writer != null){
            writer.close();
        }
    }
//        throw new EIException("请先登录", 401);
    return false;
    }
}