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Introduction to the use of split function in JavaScript from shallow to deep
Introduction to the use of split function in JavaScript from shallow to deep
相信很多小伙伴都知道JavaScript中split就是将一字符串以特定的字符分割成数组,数组一般是字符串处理比较常用的处理方法，但是没有接触过JavaScript的朋友来说，可能就有点不明白了，今天我们就带大家介绍下JavaScript中split函数由浅到深的使用！
split定义和用法
split() 方法用于把一个字符串分割成字符串数组。
语法
stringObject.split(separator,howmany)
参数 描述
separator 必需。字符串或正则表达式，从该参数指定的地方分割 stringObject。
howmany 可选。该参数可指定返回的数组的最大长度。如果设置了该参数，返回的子串不会多于这个参数指定的数组。如果没有设置该参数，整个字符串都会被分割，不考虑它的长度。
返回值
一个字符串数组。该数组是通过在 separator 指定的边界处将字符串 stringObject 分割成子串创建的。返回的数组中的字串不包括 separator 自身。
但是，如果 separator 是包含子表达式的正则表达式，那么返回的数组中包括与这些子表达式匹配的字串（但不包括与整个正则表达式匹配的文本）。
下面直接举例给大家看看
<script language="javascript">
str="2,2,3,5,6,6"; //这是一字符串
var strs= new Array(); //定义一数组
strs=str.split(","); //字符分割
for (i=0;i<strs.length ;i++ )
{
document.write(strs[i]+"<br>"); //分割后的字符输出
}
</script>split进阶技巧(特殊字符串的处理)：
在java.lang包中有String.split()方法，返回是一个数组
我在应用中用到一些，给大家总结一下，仅供大家参考：
1、如果用“.”作为分隔的话，必须是如下写法：String.split("\\."),这样才能正确的分隔开，不能用String.split(".");
2、如果用“|”作为分隔的话，必须是如下写法：String.split("\\|"),这样才能正确的分隔开，不能用String.split("|");
3、如果用“\”作为分隔的话，必须是如下写法：String.split(\\\),这样才能正确的分隔开，不能用String.split("\");
“.”，“|”和“\”都是转义字符，必须得加"\\";
3、如果在一个字符串中有多个分隔符，可以用“|”作为连字符，比如：“acount=? and uu =? or n=?”,把三个都分隔出来，可以用String.split("and|or");
例1：
如果想在串中使用"\"字符，则也需要转义.例如首先要表达"aaaa\bbbb"这个串就应该用"aaaa\\bbbb",如果要分隔就应该这样才能得到正确结果：
String[] aa = "aaa\\bbb\\bccc".split(\\\\);
例2： 
总结：
本文从简到深的介绍了JavaScript中split函数的使用，通过对本文的学习相信很多小伙伴对此都有了一定的了解和认识，希望对你的工作有所帮助！
相关推荐：
js split 的用法和定义 js split分割字符串成数组的实例代码
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