知识点相关补充

HttpServletUtils

    package com.cmcc.itoken.common.utils;
    
    import javax.servlet.http.HttpServletRequest;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    
    public class HttpServletUtils {
    
        /**
         * 获取完整请求路径，带请求参数
         *
         * @param request
         * @return
         */
        public static String getFullPath(HttpServletRequest request) {
            StringBuffer uri = request.getRequestURL();
            String url = uri.toString();
            // 获取所有请求,返回 Map 集合
            Map<String, String[]> map = request.getParameterMap();
            Set<Map.Entry<String, String[]>> entry = map.entrySet();
            Iterator<Map.Entry<String, String[]>> iterator = entry.iterator();
    
            // 遍历集合
            StringBuffer sb = new StringBuffer();
            while (iterator.hasNext()) {
                Map.Entry<String, String[]> item = iterator.next();
                //请求名
                String key = item.getKey();
                //请求值
                for (String value : item.getValue()) {
                    // 拼接每个请求参数 key=value&
                    sb.append(key + "=" + value + "&");
                }
            }
    
            String string = sb.toString();
            // 拼接 URL, URL?key=value&key=value& 并且去掉最后一个 &
            url = url + "?" + string.substring(0, string.lastIndexOf("&"));
            return url;
        }
    }