str = str.replace(/\s*/g,"");//去除所有空格
str = str.replace(/[^\u4e00-\u9fa5\w]/g,"");//去除符号
str = str.replace(/[_]/g,"");//去除下划线
str = str.replace(/\s*/g,"");//去除所有空格
str = str.replace(/[^\u4e00-\u9fa5\w]/g,"");//去除符号
str = str.replace(/[_]/g,"");//去除下划线