public static enum IndexOptions {
            DOCS_ONLY,  //僅索引文檔
            DOCS_AND_FREQS,  //索引文檔和頻率
            DOCS_AND_FREQS_AND_POSITIONS,  //索引文檔、頻率和詞的位置
            DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS, //索引文檔、頻率、詞的位置
        //以及字符偏移量
        };

        FieldType fieldType = new FieldType();
        fieldType.setStoreTermVectors(true);
        fieldType.setStoreTermVectorPositions(true);
        fieldType.setIndexed(true);
        fieldType.setIndexOptions(IndexOptions.DOCS_AND_FREQS); //索引文檔和頻率
        fieldType.setStored(true);
        Document doc = new Document();
        doc.add(new Field("content", content, fieldType));