Java 扫描仪文件

Question

我有一台扫描仪可以读取 .csv 文件。
该文件与 .java 文件位于同一目录中，但它似乎找不到该文件。
我该怎么做才能解决这个问题？

Scanner scanner = new Scanner(new File("database.csv"));

编辑:抱歉忘记提及我需要使用 Scanner 包，因为在下一行我使用了分隔符。

Scanner scanner = new Scanner(new File("database.csv"));
scanner.useDelimiter(",|\r|\n");

我也在IntelliJIDEA工作

完整代码如下

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.*;

public class City
{
public String name; // The name of the city
public String cont; // The continent of the city
public int relTime; // Time relative to Hobart (eg. -14 for New York)
public boolean dst; // Does the city use DST?
public boolean valid; // Does the city exist?
Date currDate;

City(){}; // Default constructor
City(String name, String cont, int relTime)
{
    this.name = name;
    this.cont = cont;
    this.relTime = relTime;
    valid = verify();

    if(valid)
    {
        currDate = new Date(System.currentTimeMillis() + (3600000 * relTime));
    }
}

City(String name, String cont, int relTime, int dstStartDay, int dstEndDay)
{
    this.name = name;
    this.cont = cont;
    this.relTime = relTime;
    valid = verify();

    if(valid)
    {
        currDate = new Date(System.currentTimeMillis() + (3600000 * relTime));
        // Is DST in effect?
        if(currDate.after(new Date(currDate.getYear(), 3, dstStartDay, 2, 0)) &&
                currDate.before(new Date(currDate.getYear(), 11, dstEndDay, 2, 0)))
        {
            // It is... so
            relTime--;
        }
    }
}

private boolean verify()
{
    valid = false;

    try
    {
        Scanner scanner = new Scanner(new File("\\src\\database.csv"));
        scanner.useDelimiter(",|\r|\n");
        while(scanner.hasNext())
        {
            String curr = scanner.next();
            String next = new String();
            if(scanner.hasNext())
                next = scanner.next();
            if(curr.contains(cont) && next.contains(name))
                return true;
        }
        scanner.close();
    }
    catch(FileNotFoundException e)
    {
        e.printStackTrace();
    }

    return false;
}
}

Answer 1

因为你把csv文件和源代码放在一起，不能直接new File，你可以试试，

    InputStream resourceAsStream = this.getClass().getResourceAsStream("database.csv");
    Scanner scanner = new Scanner(resourceAsStream);
    scanner.useDelimiter(",|\r|\n");