How to split this string in java

Question

嗨，在我的程序中生成一个字符串，如"1&area_id=54&cid=3" 。首先是整数，然后是字符串"&area_id=" ，然后是antoher整数，然后是字符串“＆cid =”，然后是最后的整数。这两个字符串总是相同的。但整数正在改变。如何编写分割函数，以便我可以在三个变量中或在数组中找到这三个整数。我可以通过循环分离这些但我想使用分割函数。谢谢

Answer 1

How about

string.split("&\\w+=")

This works with your example:

System.out.println(Arrays.asList("1&area_id=54&cid=3".split("&\\w+=")));

outputs

[1, 54, 3]

The call to string.split("&\\\\w+=") reads in English: Split string on every match for the regular expression parameter, and then return all substrings in between the matched tokens as an array.

The regular expression reads: Match all substrings starting with "&" , followed by at least ( "+" ) one word-character ( "\\\\w" , ie letters, digits, and some special characters, such as the underscore from your example), followed by "=" . For more details see the Javadoc for java.util.regex.Pattern