Java 扫描仪定界符错误 csv java 行尾

Question

我在扫描 csv 的最后一个 int 时收到 InputMismatchException。

public class TradeSim {
    public void readFile(String fileName) {
        try {
            // file name and absolute path
            File file = new File(fileName);
            String fullPath = file.getAbsolutePath();
            System.out.println("Using file:\n" + fullPath + "\n");

            // set File Input Stream to Full Path
            FileInputStream inputStream = new FileInputStream(fullPath);

            // open input stream and retrieve data
            Scanner scanner = new Scanner(inputStream);
            scanner.useDelimiter(System.getProperty("line.separator"));
            while (scanner.hasNext()) {
                String data = scanner.next(); // gets a whole line
                System.out.println(data);
                parseCSVLine(data);
            }
            scanner.close();
        } catch (Exception e) {
            System.out.println("Encountered Error reading file:\n" + e.toString() + "\n");
        }
    }

    public void parseCSVLine(String line) {
        Scanner scanner = new Scanner(line);
        scanner.useDelimiter(",");
        long timeStamp = scanner.nextLong();
        System.out.println("timeStamp: " + timeStamp);
        String symbol = scanner.next();
        System.out.println("symbol: " + symbol);
        int quantity = scanner.nextInt();
        System.out.println("quantity: " + quantity);
        int price = scanner.nextInt(); //Error occurs here!!
        System.out.println("price: " + price);
        Trades trades = new Trades(timeStamp, symbol, quantity, price);
    }
}

文件内容：

51300051409,fbc,273,297
51300073658,cef,250,262

输出：

Using file:
/Users/andrewkeithly/netbeansprojects/Trades Exercise/input.csv

51300051409,fbc,273,297
timeStamp: 51300051409
symbol: fbc
quantity: 273
Encountered Error reading file:
java.util.InputMismatchException

Answer 1

已解决的问题： System.getProperty("line.separator") 正在寻找 csv 未使用的特定于 Unix 的分隔符。只需将代码更改为 scanner.useDelimiter("\r?\n"); 即可解决我的问题。谢谢@汤姆！

Java 扫描仪定界符错误 csv java 行尾

Java scanner delimiter error csv java end of line

java

csv

delimiter

inputmismatchexception