用正则表达式解析地址

Question

I want to be able to parse a String into several Strings of information using regular expressions. Let's for instance use an address: "My Street 10 90210 Beverly Hills". An example of Strings I could create from this:

• My Street – street name
• 10 – house number
• 90210 – zip code
• Beverly Hills – city

I've been trying to create a pattern for it use, but I'm a little lost when it comes to analyze the String and dissect it.

Can someone get me started on this?

Answer 1

I would use string.split function.

String s = "My Street 10 90210 Beverly Hills";
String parts[] = s.split("\\s+(?=\\d+\\s+\\d+)|(?<=\\d+)\\s+(?=[A-Z])|(?<=\\d+)\\s+(?=\\d+)");
System.out.println(Arrays.toString(parts));

Output:

[My Street, 10, 90210, Beverly Hills]

Explanation:

• \\\\s+(?=\\\\d+\\\\s+\\\\d+) Matches one or more spaces only if it's followed by one or more digits plus one or more spaces plus one or more digits. So that space before house number would satisfy this condition . So it got matched.

• | Called alternation operator.

• (?<=\\\\d+)\\\\s+(?=[AZ]) Matches one or more spaces which are preceded by one or more digits and then followed by a capital letter. So the spaces before the string city would satisfy this condition and got matched.

• (?<=\\\\d+)\\\\s+(?=\\\\d+) This matches all the spaces which are in-between the digits. So the spaces between house-number and zip-code got matched.

• Splitting your input according to the matched spaces will give you the desired output.