最大公共子串和字符编辑距离算法的类实现。

函数第一个参数是用来比较的字符串，

第二个参数是被比较的字符串。

lCommonStr第三个参数是前两个字符串的公共子串。-The largest common sub-string and the character edit distance algorithm to achieve the category. Function of the first parameter is used to compare the string, the second parameter is the string to be compared. lCommonStr third parameter is the string the first two public substring.