用双引号引起来的字符串拆分问题

Question

I have a String in the below format.

"test","2, High Street, 50100 Eastleigh",",UK"

when i split the above string using below code

String[] lineArr = line.split("\",", -1)

Actual output is:

"test
"2, High Street, 50100 Eastleigh

UK"

Expected Output is:

test
2, High Street, 50100 Eastleigh
,UK

How do i handle this?

Answer 1

You can ignore the first and last " , and split on "," , as follows:

String[] lineArr = line.substring(1,line.length()-1).split("\",\"");

I am sure there are more efficient and elegant solutions, but this should be an easy adaptation of your code with an one-liner.

Answer 2

split(String match, int limit)

If limit is non-positive then the pattern will be applied as many times as possible and the array can have any length. If limit is zero then the pattern will be applied as many times as possible, the array can have any length, and trailing empty strings will be discarded.

"test","2, High Street, 50100 Eastleigh","

Here when you apply lineArr.split("\\",",-1) , limit is negative, it will return trailing empty strings as well,

test , "2, High Street, 50100 Eastleigh and empty string "" , Hence giving you 3 as length.

However if you use lineArr.split("\\",",0) or lineArr.split("\\",") no trailing empty strings are returned. So you will be getting 2 as length.

To eliminate in between empty strings i would recommend you to use lineArr.split("\\","); which is split(String match) version of above split method

According to your output you should call lineArr.split("\\",\\""); , this will give your resultant output.