Similarity 文本比对程序java文本比较算法

用法： 1. SimilarityBase similarityBase = new SimilarityRate(); double d = similarityBase.sim("aaa","bbbcccaaa"); 2. SimilarityBase similarityBase = new Distance(); double d = similarityBase.sim("aaa","bbbcccaaa"); 3. SimilarityBase similarityBase = new CosineSimilarAlgorithm(); double d = similarityBase.sim("aaa","bbbcccaaa"); 本包，提供三种文体比对方法，请参考。