java high level REST Client
一、Serach Api
SearchRequest searchRequest = new SearchRequest();
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchAllQuery());
searchRequest.source(searchSourceBuilder);

– termQuery（不会对搜索词进行分词处理，而是作为一个整体与目标字段进行匹配，若完全匹配，则可查询到）
earchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.termQuery(“user”, “kimchy”));
sourceBuilder.from(0);
sourceBuilder.size(5);
sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

–matchQuery：会将搜索词分词，再与目标查询字段进行匹配，若分词中的任意一个词与目标字段匹配上，则可查询到
MatchQueryBuilder matchQueryBuilder = new MatchQueryBuilder(“user”, “kimchy”);
// 启用模糊查询
matchQueryBuilder.fuzziness(Fuzziness.AUTO);
// 在匹配查询上设置前缀长度选项
matchQueryBuilder.prefixLength(3);
// 设置最大扩展选项以控制查询的模糊过程
matchQueryBuilder.maxExpansions(10);

排序 sort
sourceBuilder.sort(new ScoreSortBuilder().order(SortOrder.DESC));
sourceBuilder.sort(new FieldSortBuilder("_uid").order(SortOrder.ASC));