快速入门Web开发（下）（2）

package com.example.webcase.filter;
    import com.alibaba.fastjson2.JSONObject;
    import com.example.webcase.pojo.JwtUtils;
    import com.example.webcase.pojo.Result;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.util.StringUtils;
    import javax.servlet.*;
    import javax.servlet.annotation.WebFilter;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    @Slf4j
    @WebFilter(urlPatterns = "/*")//要拦截的请求
    public class LoginFilter implements Filter {
        @Override
        public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
            // 获取请求的url来进行判断
            HttpServletRequest req= (HttpServletRequest) servletRequest;//请求对象()客户端给服务器(会带令牌)
            HttpServletResponse resp= (HttpServletResponse) servletResponse;//响应对象
            //获取url
            String url =req.getRequestURI();
            log.info("url:{}",url);
            if (url.contains("login")){
                log.info("登录");
                filterChain.doFilter(servletRequest,servletResponse);
                return;
            }
            // 获取token
           String jwt= req.getHeader("token");
            //判断token是否为空
            if(!StringUtils.hasLength(jwt)){
                log.info("未登入");
              Result error=  Result.error("NOT_LOGIN");
              // 将数据转换为json格式
              String notLogin= JSONObject.toJSONString(error);
              resp.getWriter().write(notLogin);
              return;
            }
            /* 校验令牌,不通过会报错*/
           try{
               JwtUtils.parseJWT(jwt);
           }catch (Exception e){
               e.printStackTrace();
               log.info("令牌解析失败");
               /* 打印错误信息 */
               Result error=  Result.error("NOT_LOGIN");
               String notLogin= JSONObject.toJSONString(error);
               resp.getWriter().write(notLogin);
               return;
           }
            log.info("解析成功");
            filterChain.doFilter(servletRequest,servletResponse);
        }
    }

#spring事务管理日志
logging:
  level:
    org.springframework.jdbc.support.JdbcTransactionManager: debug
      

@Transactional