Question

所以我有以下代码来检查名为Doctors.txt的文本文件

它有以下信息：

35000   2000    AV122258C   Dr Alex James   CARDIO
30500   2005    AB347433C   Miss Elizabeth Kooper   MB
32653   1995    JA103240B   Dr Mohammed Khan    ON
64400   2001    JG371458A   Dr Tom Jacob    CARDIO
91000   2002    IH102411Y   Dr Rahana Mohammed  ON 
55000   1987    JJ405626N   Dr Mary Francis AN
87000   1988    WQ333452N   Mr Mark Cromwell    NEURO
60500   1998    HK413942S   Mr Victor Jacob GASTRO
40000   2003    AJ103006X   Dr Mia Larson   GS
42000   2003    ER148468D   Dr Rizwan Hussain   GS
38000   2004    RB193984P   Dr Lam Yeng HAE

它自己的类文件......

import java.io.PrintWriter;
import java.io.FileReader;
import java.util.Scanner;
import java.io.IOException;

public class FileHandler
 {
/**
 * Save all doctor records to a file
 * @param doctors  the DoctorList to save
 */
public void saveRecords(DoctorList doctors)
{  
      PrintWriter writer = null;
    try
    {   // NB: the file name is hard-coded
        writer = new PrintWriter("Doctors.txt");
        writer.println(doctors.toString());
        writer.flush();
    }
    catch(IOException e)
    {
        System.out.println("Error writing file");
    }
    finally
    {
        writer.close();
    }
}

/**
 * Load doctor records from the file
 * @param doctors  the DoctorList to add doctors to
 */
public void readRecords(DoctorList doctors)
{
    FileReader reader = null;
    try
    {
       // NB: the file name is hard-coded
        reader = new FileReader("Doctors.txt");
        Scanner sc = new Scanner(reader);

        String record;
        String[] data;
            Doctor doctor;
        while(sc.hasNextLine())
        {
            record = sc.nextLine();
            if(record.length() != 0)
            {
                data = record.split("\t", 5);
                      doctor = DoctorFactory.newDoctor(data[3], data[0], data[2], data[1], data[4]);
                doctors.add(doctor);
            }
        }
    }
    catch(IOException e)
    {
        System.out.println("Error reading file");
        e.printStackTrace();
    }
 }
}

我把它放在同一区域内： enter image description here

然而，当我运行主类时，它似乎无法读取内容......

Answer 1

路径是你的问题。试试这个：

 reader = new FileReader("src/Doctors.txt");

更好的解决方案是不依赖文件路径，并使用getResourceAsStream()从InputStream返回CLASSPATH。

Answer 2

到应用程序时。构建后，文本'文件'通常会在Jar中。它可以通过URL读取，但不能写入。

这种“持久性”风格资源的通常策略是将它们放在user.home的子目录中，然后通过File

访问它们

为什么我不能在我的项目中访问此.txt文件？

2 个答案: