问如何在Java中读取文本文件中的格式化数据

EN

String s = "Marsha      1234     Florida   1268";
s.split("\\s+");

String s = "Marsha      1234     Florida   1268";

Pattern pattern = Pattern.compile("(\\w+)\\s+(\\d+)\\s+(\\w+)\\s+(\\d+)");
Matcher matcher = pattern.matcher(s);

if (!matcher.matches())
    throw new IllegalArgumentException("line does not match the expected pattern"); //or do whatever else is appropriate for your use case

String name = matcher.group(1);
String id = matcher.group(2);
String state = matcher.group(3);
String whatever = matcher.group(4);

public class MainClass
{

public static void main(String[] args)
{
    String s = "{\r\n"+
               "Marsha      1234     Florida   1268\r\n" + 
               "Jane        1523     Texas     4456\r\n" + 
               "Mark        7253     Georgia   1234\r\n"+
               "}\r\n";

    String[] rows = s.split("\r\n");

    //Here we will keep evertihing without the first and the last row
    List<String> importantRows = new ArrayList<>(rows.length-2);
    //lets assume that we do not need the first and the last row
    for(int i=0; i<rows.length; i++)
    {
        //String r = rows[i];
        //System.out.println(r);

        if(i>0 && i<rows.length)
        {
            importantRows.add(rows[i]);
        }

    }

    List<String> importantWords = new ArrayList<>(rows.length-2);
    //Now lets split every 'word' from row
    for(String rowImportantData : importantRows)
    {
        String[] oneRowData = rowImportantData.split(" ");

        //Here we will have one row like: [Marsha][ ][ ][ ][1234][ ][ ][ ][Florida][ ][ ][1268]
        // We need to remove the whitespace. This happen because there is more        
        //then one whitespace one after another. You can use some regex or another approach 
        // but I will show you this because you can have data that you do not need and you want to remove it.
        for(String data : oneRowData)
        {
            if(!data.trim().isEmpty())
            {
                importantWords.add(data);
            }
            //System.out.println(data);
        }

    }

    //Now we have the words.
    //You must know the rules that apply for this data. Let's assume from your example that you have (Name Number) group
    //If we want to print every group (Name Number) and we have in this state list with [Name][Number][Name][Number]....
    //Then we can print it this way
    for(int i=0; i<importantWords.size()-1; i=i+2)
    {
        System.out.println(importantWords.get(i) + " " + importantWords.get(i+1));
    }

}

}

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class CustomTextReader {

    public static void main(String[] args) {
        String text =
                "Marsha      1234     Florida   1268\r\n" + 
                "Jane        1523     Texas     4456\r\n" + 
                "Mark        7253     Georgia   1234";

        //Extract the relevant data from the text as a list of arrays
        //  in which each array is a line, and each element is a field. 
        List<String[]> data = getData(text);
        //Just printing the results
        print(data);
    }

    private static List<String[]> getData(String text) {
        //1. Separate content into lines.
        return Arrays.stream(text.split("\r\n"))
                //2. Separate lines into fields.
                .map(s -> s.split("\\s{2,}"))
                .collect(Collectors.toList());
    }

    private static void print(List<String[]> data) {
        data.forEach(line -> {
            for(String field : line) {
                System.out.print(field + " | ");
            }
            System.out.println();
        });

    }
}