[ElasticSearch] 中文字符串精确搜索 term 搜不到结果

Question

    public static void termQuery(Client client, String index, String type) {

        // Query
        QueryBuilder queryBuilder = QueryBuilders.termQuery("college", "计算机学院");

        // Search
        SearchRequestBuilder searchRequestBuilder = client.prepareSearch(index);
        searchRequestBuilder.setTypes(type);
        searchRequestBuilder.setQuery(queryBuilder);

        // 执行
        SearchResponse searchResponse = searchRequestBuilder.execute().actionGet();

        // 结果
        queryResult(searchResponse);
    }

搜索college为计算机学院 原始数据中有，却搜不到结果

原始数据：

11:34:22.674 [main] INFO  com.sjf.open.api.Search - ----------hit source: id 9 source {college=计算机学院, school=西安电子科技大学, sex=boy, name=廖力生, age=21}
11:34:22.677 [main] INFO  com.sjf.open.api.Search - ----------hit source: id 2 source {college=通信学院, school=西安电子科技大学, sex=boy, name=李源一, age=19}
11:34:22.677 [main] INFO  com.sjf.open.api.Search - ----------hit source: id 4 source {college=电子工程学院, school=中国科技大学, sex=girl, name=王俊辉, age=21}
11:34:22.678 [main] INFO  com.sjf.open.api.Search - ----------hit source: id 1 source {college=计算机学院, school=西安电子科技大学, sex=boy, name=徐欣, age=21}
11:34:22.678 [main] INFO  com.sjf.open.api.Search - ----------hit source: id 3 source {college=电子工程学院, school=西安电子科技大学, sex=boy, name=陈哲超, age=18}