用正则表达式匹配文章中所有的单词

1.在javascript中：

var str=‘int year = 2018;System.out.println(year + "不是闰年")';
str.match(/[a-zA-Z]+/ig);
//结果["int", "year", "System", "out", "println","year "]var str=‘int year = 2018;Syst