Is it possible to take specific sections from a String without knowing the exact length/contents of-CodePudding

I want 4 strings, and each one needs to be a certain section of an "input" string.

input:

"AP     3A:23:03:DA:30:50   name     2427/20/gn(27dBm)                 -91 -104  13"

output:

string1 = "name"
string2 = "2427"
string3 = "20"
string4 = "-91"

I having trouble finding a consistent way to do this, because potential input strings could look like this:

AP F8:CA:59:6D:29:56  AWI-500544  2412/20/gn(27dBm) -33 -103  70

or this:

AP     30:23:03:DA:30:50 Device/Mesh2566                  2427/20/gn(27dBm)                         -89 -104  15

string1 could potentially contain a "/" or pattern of numbers such as 2427. Also the number of spaces in the input string can vary drastically.

Is there a way to do this?

Thanks in advance

CodePudding user response：

I found a solution by using an additional substring provided at the beginning of the input. Not the best, but it will work.

public static void createItems(String input)
{
    // 25 chars before "SSID"
    
    String[] lines = input.split("\r\n|\r|\n");
    
    String ssid = lines[0].split("S           ")[1];        
    ssid = ssid.substring(0, ssid.indexOf("C"));        
    
    String channel = lines[0].substring(ssid.length()   25);        
    channel = channel.substring(0, channel.indexOf("S"));   
    
    String signal = lines[0].substring(channel.length()   ssid.length()   25);      
    signal = signal.substring(0, signal.indexOf("G")   1);

    for(String s : lines)
    {
        if(!s.startsWith(" "))
        {
            items.add(new Item(
                    s.substring(25, 25   ssid.length()).trim(),
                    Integer.parseInt(s.substring(ssid.length()   25, ssid.length()   25   4)),
                    Integer.parseInt(s.substring(ssid.length()   25   5, ssid.length()   25   5   2)),
                    Integer.parseInt(s.substring(ssid.length()   channel.length()   25, ssid.length()   channel.length()   25   3))));
            System.out.println(items.get(items.size() - 1));
        }
    }
}

input:

       ADDRESS           SSID                                                                   CHANNEL                                                                   SIG   NF SNR RADIO-NAME                                                                   ROUTEROS-VERSION                                                                  
AP     02:3C:52:EC:61:00 vsat-24g-A6C2B0                                                        2462/20/gn(18dBm)                                                         -82 -115  33
AP     F8:CA:59:6D:29:56 AWI-500544                                                             2412/20/gn(27dBm)                                                         -33 -103  70
AP     DC:EF:09:E6:13:F4 Fender's Wifi_EXT                                                      2427/20/gn(27dBm)                                                         -89 -104  15
AP     36:23:03:DA:30:50 _VelopEavenson-guest                                                   2427/20/gn(27dBm)                                                         -89 -104  15
AP     30:23:03:DA:30:50 Eavenson Mesh                                                          2427/20/gn(27dBm)                                                         -89 -104  15
AP     3A:23:03:DA:30:60                                                                        2442/20/gn(27dBm)                                                         -78 -102  24
AP     30:23:03:DA:30:60 Eavenson Mesh                                                          2442/20/gn(27dBm)                                                         -90 -102  12
AP     36:23:03:DA:30:60 _VelopEavenson-guest                                                   2442/20/gn(27dBm)                                                         -85 -102  17
AP     94:A6:7E:E6:3D:FA NETGEAR26 2.4Ghz                                                       2452/20/gn(27dBm)                                                         -86 -104  18
AP     36:23:03:DA:30:C4 _VelopEavenson-guest                                                   2462/20/gn(27dBm)                                                         -82 -104  22
AP     3A:23:03:DA:30:C4                                                                        2462/20/gn(27dBm)                                                         -81 -104  23
AP     30:23:03:DA:30:C4 Eavenson Mesh                                                          2462/20/gn(27dBm)                                                         -80 -104  24
AP     3A:23:03:DA:30:50                                                                        2427/20/gn(27dBm)                                                         -91 -104  13

output:

[vsat-24g-A6C2B0,2462,20,-82]
[AWI-500544,2412,20,-33]
[Fender's Wifi_EXT,2427,20,-89]
[_VelopEavenson-guest,2427,20,-89]
[Eavenson Mesh,2427,20,-89]
[,2442,20,-78]
[Eavenson Mesh,2442,20,-90]
[_VelopEavenson-guest,2442,20,-85]
[NETGEAR26 2.4Ghz,2452,20,-86]
[_VelopEavenson-guest,2462,20,-82]
[,2462,20,-81]
[Eavenson Mesh,2462,20,-80]
[,2427,20,-91]

CodePudding user response：

Use regex to split with all spaces: "\s" - space " " - one or more

String first = "AP F8:CA:59:6D:29:56  AWI-500544  2412/20/gn(27dBm) -33 -103  70\n";

    String[] arrayOfString = first.split("\\s ");
    String string4 = arrayOfString[3];
    String[] arrayOfString4 = string4.split("/");

    String resultStr1 = arrayOfString[2];
    String resultStr2 = arrayOfString4[0];
    String resultStr3 = arrayOfString4[1];
    String resultStr4 = arrayOfString[4];