idea 单测里运行词向量训练，出现OOM

[yidasanqian]

@Test
public void testWord2VectorTrain() {
    String trainFile = "D:\\Develop\\hanlp\\data\\hanlp-wiki-vec-zh.txt";
    String modelFile = "D:\\Develop\\hanlp\\data\\model\\word2vec.txt";
    Word2VecTrainer trainerBuilder = new Word2VecTrainer();
    trainerBuilder.setCallback(new TrainingCallback() {
        @Override
        public void corpusLoading(float v) {
            System.out.println("语料加载中 = " + v + "%");
        }

        @Override
        public void corpusLoaded(int i, int i1, int i2) {
            System.out.println("语料加载完毕 = 词表大小:" + i + "\t实际训练用到的词的总词频:" + i1 + "\t全部词语的总词频:"+i2);
        }

        @Override
        public void training(float v, float v1) {
            System.out.println("学习率:" + v + "\t练完成百分比:"+v1);
        }
    });
    WordVectorModel wordVectorModel = trainerBuilder.train(trainFile, modelFile);
    System.out.println("wordVectorModel = " + wordVectorModel.similarity("医疗", "医院"));
}

版本：portable-1.7.8
jvm：-Xmx5000m