ReadFile.java

package heyingzhe;

import java.util.*;
import java.io.*;

public class ReadFile {
    // 从filepath中读取txt文件，并按照分隔符进行读取文件，保存存list数据类型
    public static List<Map<String, String>> readFile(String filePath, String delimiter) throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(filePath)); //读取文件
        List<Map<String, String>> records = new ArrayList<>(); //创建arraylist数据，里面储存map型数据
        String line;

        // 读取标题行，作为字段名
        String[] fieldNames = reader.readLine().split(delimiter);

        // 逐行读取数据
        while ((line = reader.readLine()) != null) {
            String[] fields = line.split(delimiter);
            Map<String, String> record = new HashMap<>();
            for (int i = 0; i < fieldNames.length; i++) {
                record.put(fieldNames[i].trim(), fields[i].trim());
            }
            records.add(record);
        }
        reader.close();
        return records;
    }

    // 读取数据
    public static List<Map<String, String>> readFile(String filePath) throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(filePath)); //读取文件
        List<Map<String, String>> records = new ArrayList<>(); //创建arraylist数据，里面储存map型数据
        String line;
        String delimiter = "\\s+";

        // 读取标题行，作为字段名
        String[] fieldNames = reader.readLine().split(delimiter);

        // 逐行读取数据
        while ((line = reader.readLine()) != null) {
            String[] fields = line.split(delimiter);
            Map<String, String> record = new HashMap<>();
            for (int i = 0; i < fieldNames.length; i++) {
                record.put(fieldNames[i].trim(), fields[i].trim());
            }
            records.add(record);
        }
        reader.close();
        return records;
    }
}