Question

我有一个包含以下内容的数据文件“ inventory.dat”：

Item ID             |Item Name                               |Item Description                                                                                    |Weight       |Quantity      |Price       |Isle                |Bin
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BK1012923           |#8 x 1" Wood Screws (Qty 8)             |#8 x 1" Wood Screws (Qty 8) - Plastic bag                                                           |0.04         |144           |0.65        |Isle-N23            |Bin-N23-14-3
BK1022344           |#8 x 1" Wood Screws (Qty 8)             |#8 x 1 1/2" Wood Screws (Qty 8) - Plastic bag                                                       |0.06         |144           |0.65        |Isle-N23            |Bin-N23-14-3
BK1022344           |#8 x 1" Wood Screws (Qty 8)             |#8 x 1 1/2" Wood Screws (Qty 8) - Plastic bag                                                       |0.06         |50            |0.65        |Isle-S18            |Bin-S18-01-2

Summary: 338 items   Total Value: $219.70

我希望能够将每条数据读入单独的变量中，分别用于项目ID，项目名称，项目说明，重量，数量，价格，岛和箱。我将如何使用BufferedReader来做到这一点？

摘要和总值应忽略。

import java.io.*;
import java.util.*;
/**
 * 
 *
 */
public class FileRead {
    public static void main (String[] argv) {
        BufferedReader reader;
        String line;
        String data;
        ArrayList<String> itemID = new ArrayList<String>();
        ArrayList<String> itemName = new ArrayList<String>();
        ArrayList<String> itemDesc = new ArrayList<String>();
        ArrayList<String> weight = new ArrayList<String>();
        ArrayList<Integer> quant = new ArrayList<Integer>();
        ArrayList<Float> price = new ArrayList<Float>();
        ArrayList<String> aisle = new ArrayList<String>();
        ArrayList<String> bin = new ArrayList<String>();

        try {
            reader = new BufferedReader(new FileReader("resources/inventory.dat"));

            while ((line = reader.readLine() != null)) {
                //
            }
        }
        catch (IOException e)
        {
            System.err.println(e);
        }

    }
}

Answer 1

这是一种实现方法。我使用line.split("\\|")来分隔行，并以|作为分隔符。而且由于摘要和总计之前文件中有一个空行，因此您可以使用if(line.isEmpty())

来中断循环

    try {
        reader = new BufferedReader(new FileReader("resources/inventory.dat"));
        //ignore first two lines
        line = reader.readLine(); //read first line
        line = reader.readLine(); //read second line

        line = reader.readLine(); //read third line
        while (line != null){

            if(line.isEmpty())
                break;

            String [] l  = line.split("\\|"); //Split the lines

            //Add data
            itemID.add(l[0]);
            itemName.add(l[1]);
            itemDesc.add(l[2]);
            weight.add(l[3]);
            quant.add(Integer.parseInt(l[4].trim()));
            price.add(Float.parseFloat(l[5].trim()));
            aisle.add(l[6]);
            bin.add(l[7]);

            line = reader.readLine();

        }
    }

将数据文件（txt）读入Java变量

1 个答案: