余弦相似度计算代码

import java.util.ArrayList;
import java.util.List;

public class ComputerDecision {

List<Integer> vector1 = new ArrayList<Integer>();
List<Integer> vector2 = new ArrayList<Integer>();

public ComputerDecision(String string1, String string2) {
//把输入字符串中多个空格变为一个
String[] vector1String = string1.trim().replaceAll("\\s+", " ").split(" ");
String[] vector2String = string2.trim().replaceAll("\\s+", " ").split(" ");

for (String string : vector1String) {
vector1.add(Integer.parseInt(string));
}
for (String string : vector2String) {
vector2.add(Integer.parseInt(string));
}
}

// 求余弦相似度
public double sim() {
double result = 0;
result = pointMulti(vector1, vector2) / sqrtMulti(vector1, vector2);

return result;
}