Java:判断字符串中包含某字符的个数
JAVA中查询一个词在内容中出现的次数:
public int getCount(String str,String key){
if(str == null || key == null || "".equals(str.trim()) || "".equals(key.trim())){
return 0;
}
int count = 0;
int index = 0;
while((index=str.indexOf(key,index))!=-1){
index = index+key.length();
count++;
}
return count;
}