分割字符串并删除Java中的第二个空格

Question

I have log data in a raw file. It looks like this:

"2 A U W 2 0 1 1 1 1 1 6 0 0 1 0 0 0        U S E R N 1      F T Y 0 0 0 0 0 0 D 9         2 A I L 2 0 1 1 1 1 1 6" 

and so on.

I need to substring this string on messages of equal length (From "2 AUW" to "4 AIL" 400 bytes). This is made by String as = s.substring(0,400).toLowerCase() . But this is not enough for me. I want to make a message like this:

2auw 
20011111600100 
usern1 
fty000000d9

Can anyone help with it?

Answer 1

This will get your work done. If you are having a lot of data like the above line, we will have to figure some other logic. I don't think it will be apt for millions of records.

String asd = "2 A U W 2 0 1 1 1 1 1 6 0 0 1 0 0 0        U S E R N 1      F T Y 0 0 0 0 0 0 D 9         2 A I L 2 0 1 1 1 1 1 6";
asd = asd.replaceAll("      ", "\n");
asd= asd.replaceAll(" ", "");
System.out.println(asd);

Please note the space between "USERN 1" and "FTY 0 0 0 0 0 0 D 9" is having minumum number of simultaneous spaces. So, I have used that number of spaces to insert new line character.
The logic will result in wrong output if space between characters is greater than two times this <6 space> string. ie: there will be <12 spaces> continuously.
To solve that you can insert this code just before printing. But use it only if such data happens.

asd= asd.replaceAll("\n\n", "\n");

Answer 2

You can add a back slash n "\\n" to add line breaks to your string.

I'm not sure if this is the best way, but it is one way to do it: If you know where you need the line breaks you can substring and add the back slash n. Something like this:

String s = as.substring(0,4) + "\n" + as.substring(4,18) + "\n" + //....and so on

Hope it helps

Answer 3

Have you tried:

String[] split = s.split("\\s+");

You may need to tweak the reg-exp.