//js统计字符串中包含的特定字符个数function getPlaceholderCount(strSource) { //统计字符串中包含{}或{xxXX}的个数 var thisCount = 0; strSource.replace(/\{[xX]+\}|\{\}/g, function (m, i) { //m为找到的{xx}元素、i为索引 thisCount++; }); return thisCount;}原文：http://www.cnblogs.com/yujiangong/p/5878305.html