feat: loadBalancer兼容gateway和普通http请求，后续增加webflux版本控制

zlt-commons/zlt-loadbalancer-spring-boot-starter/src/main/java/com/central/common/lb/filter/LbIsolationFilter.java

-package com.central.common.lb.filter;
-
-import cn.hutool.core.util.StrUtil;
-import com.central.common.constant.CommonConstant;
-import com.central.common.constant.ConfigConstants;
-import com.central.common.context.LbIsolationContextHolder;
-import org.apache.commons.lang3.StringUtils;
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.web.filter.OncePerRequestFilter;
-
-import javax.servlet.Filter;
-import javax.servlet.FilterChain;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-
-/**
- * web过滤器
- * 作用：将请求中的存放在参数和header的版本号获取出来并存入TreadLocal中
- *
- * @author jarvis create by 2022/3/9
- */
-@ConditionalOnClass(Filter.class)
-public class LbIsolationFilter extends OncePerRequestFilter {
-    @Value("${" + ConfigConstants.CONFIG_LOADBALANCE_ISOLATION_ENABLE + ":false}")
-    private boolean enableIsolation;
-
-    @Override
-    protected boolean shouldNotFilter(HttpServletRequest request) {
-        return !enableIsolation;
-    }
-    @Override
-    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
-        try {
-            String version = StringUtils.isNotBlank(request.getParameter(CommonConstant.Z_L_T_VERSION))?
-                    request.getParameter(CommonConstant.Z_L_T_VERSION):
-                    request.getHeader(CommonConstant.Z_L_T_VERSION);
-            if(StrUtil.isNotEmpty(version)){
-                LbIsolationContextHolder.setVersion(version);
-            }
-
-            filterChain.doFilter(request, response);
-        } finally {
-            LbIsolationContextHolder.clear();
-        }
-    }
-}