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Java ´®Æ¥ÅäBrute ForceËã·¨

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package ibees.sample;
/**
* ×Ö·û´®Æ¥ÅäģʽËã·¨Brute-ForceËã·¨£¬´ËË㷨ÿ´Î±È½Ï¶¼»á»ØÍË
* @author hhzxj2008
* */
public class StringMatch {

/**
* Ï൱ÓÚjava.lang.StringµÄindexOf,²ÉÓÃBrute-ForceËã·¨
* */
public int match(String str,String substr){
//1.×Ö´®µÄµÚÒ»×Ö·ûÓëÖ÷´®µÄµÚÒ»¸ö×Ö·û±È½Ï£¬Èô²»Æ¥Åä×Ö´®µÄµÚÒ»¸ö×Ö·ûºÍÖ÷´®µÄµÚ¶þ¸ö×Ö·û±È½Ï
//2.Èô×Ö´®µÄµÚÒ»¸ö×Ö·ûÓëÖ÷´®µÄijһλÖÃÉÏ×Ö·û´®Æ¥Å䣬Ôò½«×Ö´®µÄµÚ¶þ¸ö×Ö·ûÓëÖ÷´®¸ÃλµÄÏÂһλÖÃ
// ½øÐбȽϣ¬ÒÀ´ÎÀàÍÆ¡£Óöµ½²»ÏàµÈ£¬ÔòÖØ¸´µÚÒ»²½¡£
int index = -1;
boolean match = true;
for(int i = 0; i <= str.length()-substr.length(); i ++){//str
match = true;
for(int j = 0; j < substr.length(); j ++){//substr
if(str.charAt(i+j) != substr.charAt(j)){
match = false;
}
}
if(match){
index = i;
break;
}
}
return index;
}


}

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