ElasticSearch 获取所有索引

  GetAliasesRequest request = new GetAliasesRequest();
            GetAliasesResponse getAliasesResponse =  client.indices().getAlias(request,RequestOptions.DEFAULT);
            Map<String, Set<AliasMetaData>> map = getAliasesResponse.getAliases();
            Set<String> set = map.keySet();
            Object[] objects = set.toArray();
            String[] indices = new String[set.size()];
            for (int i = 0; i < indices.length; i++) {
                indices[i] = (String) objects[i];
            }