由于需求，需要在网关层做一些参数的替换，特此记录一下，以下方式只针对GET请求

import com.netflix.zuul.ZuulFilter;import com.netflix.zuul.context.RequestContext;import org.apache.commons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;import org.springframework.stereotype.Component;import javax.servlet.http.HttpServletRequest;import java.util.HashMap;import java.util.LinkedList;import java.util.List;import java.util.Map;/** * 过滤参数 * * @author  *         2019-5-17 10:01 */@Componentpublic class ParametersFilter extends ZuulFilter {    private static final Logger LOGGER = LoggerFactory.getLogger(ParametersFilter.class);    private static final String KEY = "PARAMETER_FILTER_KEY";    @Override    public String filterType() {        return FilterConstants.PRE_TYPE;    }    @Override    public int filterOrder() {        return 9;    }    @Override    public boolean shouldFilter() {        return true;    }    @Override    public Object run() {        // 获取到request        RequestContext ctx = RequestContext.getCurrentContext();        HttpServletRequest request = ctx.getRequest();        try {            //是否拦截           // todo            //防止错误重试多次转换            Boolean isConver = (Boolean) request.getAttribute(KEY);            if (isConver != null && isConver) {                return null;            }            String method = request.getMethod();            LOGGER.info("将对请求进行替换, 方法为{}, url = {}", method, request.getRequestURI());            // get方法            if ("GET".equals(method.toUpperCase())) {                //获取参数                Map
     
       parameterMap = request.getParameterMap();                if (parameterMap == null) {                    return null;                }                //替换,业务逻辑                Map
      
       > requestQueryParams = ctx.getRequestQueryParams();                if (requestQueryParams == null) {                    requestQueryParams = new HashMap<>(parameterMap.size() * 2);                }                for (String key : parameterMap.keySet()) {                    String[] values = parameterMap.get(key);                    List
       
         valueList = new LinkedList<>();                    for (String value : values) {                        valueList.add(change(value));                    }                    requestQueryParams.put(key, valueList);                }                //重新写入参数                ctx.setRequestQueryParams(requestQueryParams);                LOGGER.info("转译完成, url = {}", request.getRequestURI());            }        } catch (Exception e) {            LOGGER.error("参数替换异常:{}", e);        } finally {            request.setAttribute(KEY, true);        }        return null;    }    /**     * 替换     *     * @param data 数据     * @return 转译后数据     */    private String change(String data) {        // todo        return data;    }}