How to use split() method
split()方法在不同语言中有不同的使用方法：1、在Java中，split()方法是根据匹配给定的正则表达式来拆分字符串，语法是“public String[] split(String regex, int limit)”；2、在Python中，split()方法是通过指定分隔符对字符串进行切片，语法是“str.split(str="", num=string...)”。
本教程操作环境：Windows10系统、Java 8.0&&Python 2.7、Dell G3电脑。
split()方法怎么用？
Java split() 方法
Python split() 方法
Java split() 方法
split() 方法根据匹配给定的正则表达式来拆分字符串。
注意： . 、 $、 | 和 * 等转义字符，必须得加 \\。
注意：多个分隔符，可以用 | 作为连字符。
语法
public String[] split(String regex, int limit)
参数
regex -- 正则表达式分隔符。 limit -- 分割的份数。
返回值
字符串数组。
实例
public class Test {
public static void main(String args[]) {
String str = new String("Welcome-to-Runoob");
System.out.println("- 分隔符返回值 :" );
for (String retval: str.split("-")){
System.out.println(retval);
}
System.out.println("");
System.out.println("- 分隔符设置分割份数返回值 :" );
for (String retval: str.split("-", 2)){
System.out.println(retval);
}
System.out.println("");
String str2 = new String("www.runoob.com");
System.out.println("转义字符返回值 :" );
for (String retval: str2.split("\\.", 3)){
System.out.println(retval);
}
System.out.println("");
String str3 = new String("acount=? and uu =? or n=?");
System.out.println("多个分隔符返回值 :" );
for (String retval: str3.split("and|or")){
System.out.println(retval);
}
}
}以上程序执行结果为：
- 分隔符返回值 : Welcome to Runoob - 分隔符设置分割份数返回值 : Welcome to-Runoob 转义字符返回值 : www runoob com 多个分隔符返回值 : acount=? uu =? n=?
Python split() 方法
Python split() 通过指定分隔符对字符串进行切片，如果参数 num 有指定值，则分隔 num+1 个子字符串
语法
split() 方法语法：
str.split(str="", num=string.count(str)).
参数
str -- 分隔符，默认为所有的空字符，包括空格、换行(\n)、制表符(\t)等。 num -- 分割次数。默认为 -1, 即分隔所有。
返回值
返回分割后的字符串列表。
实例
以下实例展示了 split() 函数的使用方法：
实例(Python 2.0+)
#!/usr/bin/python # -*- coding: UTF-8 -*- str = "Line1-abcdef \nLine2-abc \nLine4-abcd"; print str.split( ); # 以空格为分隔符，包含 \n print str.split(' ', 1 ); # 以空格为分隔符，分隔成两个
以上实例输出结果如下：
['Line1-abcdef', 'Line2-abc', 'Line4-abcd'] ['Line1-abcdef', '\nLine2-abc \nLine4-abcd']
以下实例以 # 号为分割符，指定第二个参数为 1，返回两个参数列表。
实例(Python 2.0+)
#!/usr/bin/python
# -*- coding: UTF-8 -*-
txt = "Google#Runoob#Taobao#Facebook"
# 第二个参数为 1，返回两个参数列表
x = txt.split("#", 1)
print x以上实例输出结果如下：
['Google', 'Runoob#Taobao#Facebook']
推荐学习：《Java视频教程》《Python视频教程》
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