add explain log

 package com.yoho.search.service.searchexplainer;
 
-import com.carrotsearch.hppc.ObjectLookupContainer;
-import com.google.common.cache.CacheBuilder;
-import com.google.common.cache.CacheLoader;
-import com.yoho.search.base.utils.ISearchConstants;
-import com.yoho.search.core.es.IElasticsearchClient;
-import com.yoho.search.core.es.model.SearchParam;
-import com.yoho.search.core.es.model.SearchResult;
-import com.yoho.search.service.service.ESClientMgr;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
 import org.apache.commons.collections.CollectionUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.elasticsearch.action.admin.indices.analyze.AnalyzeResponse;
@@ -20,11 +26,16 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.util.Assert;
 
-import java.io.IOException;
-import java.util.*;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeUnit;
-import java.util.stream.Collectors;
+import com.alibaba.fastjson.JSON;
+import com.carrotsearch.hppc.ObjectLookupContainer;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.yoho.search.base.utils.ISearchConstants;
+import com.yoho.search.core.es.IElasticsearchClient;
+import com.yoho.search.core.es.model.SearchParam;
+import com.yoho.search.core.es.model.SearchResult;
+import com.yoho.search.service.service.ESClientMgr;
 
 /**
  * Created by ginozhang on 2016/11/16.
@@ -183,6 +194,9 @@ public class SearchExplainerService {
         map.put("data", resultList);
         map.put("searchTokens", searchTokens);
         map.put("queryMatchResult", queryMatchResult);
+        
+        logger.warn("explain show info with JSON is :" + JSON.toJSONString(map));
+        logger.warn("explain show info with ObjectMapper is :" + new ObjectMapper().writeValueAsString(map));
 
         logger.info("End to show skn tokens. skn={}, keyword={}, cost={}.", skn, keyword, System.currentTimeMillis() - start);
         return map;
@@ -203,7 +217,7 @@ public class SearchExplainerService {
 
         return searchFieldResult;
     }
-
+    
     public Map<String, Object> explain(Map<String, String> paramMap) throws Exception {
         long start = System.currentTimeMillis();
         logger.info("Begin to explain search. start: {}, paramMap: {}.", start, paramMap);