long to String

Fancy

2024-06-26 5ad8d7ffce0bf9c76da40628363f1ca494fa5043

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package com.dy.common.webFilter;
 
import com.alibaba.fastjson2.JSON;
import com.dy.common.contant.Constant;
import com.dy.common.webUtil.BaseResponse;
import com.dy.common.webUtil.BaseResponseUtils;
import com.mysql.cj.util.StringUtils;
import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
 
import java.io.IOException;
import java.io.PrintWriter;
 
/**
 * 登录用户token过滤器
 * 此类没有注解 @Component ， 以在集成其的子模块中加入此过滤器
 */
@Slf4j
public class UserTokenFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
 
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String token = request.getHeader(Constant.UserTokenKeyInHeader);
        if(!StringUtils.isNullOrEmpty(token)){
            UserTokenContext.set(token);
            filterChain.doFilter(servletRequest, servletResponse);
        }else{
            PrintWriter pw = null ;
            try {
                BaseResponse<?> res = BaseResponseUtils.buildToLogin() ;
                String jsonString = JSON.toJSONString(res);
                response.setCharacterEncoding("UTF-8");
                response.setContentType("application/json; charset=utf-8");
                pw = response.getWriter() ;
                pw.write(jsonString);
                pw.flush();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if(pw != null){
                    pw.close();
                }
            }
            //request.setAttribute(Constant.ErrorKeyInRequest, "未得到用户token");
            //response.sendRedirect("/error");
        }
    }
 
    @Override
    public void destroy() {
    }
}