#region 判断两个字符相似度
//公式：l = q/(q+r+s);
private string Similarity(string a, string b)
{
string a1 = "";
string b1 = "";
//消除重复
for(int i=0;i<a.Length;i++)
{
string emtpy=a.Substring(i,1).ToString();
if(a1.Length==0)
{
a1=emtpy;
}
if(a1.IndexOf(emtpy,0)<0)
{
a1+=emtpy;
}
}
//消除重复
for (int i = 0; i < b.Length; i++)
{
string emtpy = b.Substring(i, 1).ToString();
if (b1.Length == 0)
{
b1 = emtpy;
}
if (b1.IndexOf(emtpy, 0) < 0)
{
b1 += emtpy;
}
}
//计算相似度
if (a1.Length >= b1.Length)
{
int q = 0;
for (int i = 0; i < b1.Length; i++)
{
for (int j = 0; j < a1.Length; j++)
{
if (b1.Substring(i, 1).ToString() == a1.Substring(j, 1).ToString())
{
q += 1;
}
}
}
System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();
provider.PercentDecimalDigits = 2;//小数点保留几位数.
provider.PercentPositivePattern = 1;//百分号出现在何处.
double result = (double)q / (a1.Length + b1.Length - q);//一定要用double类型.
return result.ToString("P", provider);
}
else
{
int q = 0;
for (int i = 0; i < a1.Length; i++)
{
for (int j = 0; j < b1.Length; j++)
{
if (a1.Substring(i, 1).ToString() == b1.Substring(j, 1).ToString())
{
q += 1;
}
}
}
System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();
provider.PercentDecimalDigits = 2;//小数点保留几位数.
provider.PercentPositivePattern = 1;//百分号出现在何处.
double result = (double)q / (a1.Length + b1.Length - q);//一定要用double类型.
return result.ToString("P", provider);
}
}
#endregion
装载http://blog.sina.com.cn/s/blog_5f254b8a0100t4hy.html
参考文章：http://www.360doc.com/content/09/0201/10/96202_2430832.shtml