Scanner类的应用

1、读取文件内容

给定一个文件的路径，readFile()方法负责读取文件中的内容，nextLine()方法每次读取一行信息

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class TestScanner {
    private static void readFile(String fileName){
        try {
            Scanner scanner = new Scanner(new File(fileName));
            while (scanner.hasNext()) {
                String result = scanner.nextLine();
                System.out.println(result);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        String filename = "F:\\WorkSpace\\Java202105\\springbootdemo\\src\\demo\\TestScanner.java";
        readFile(filename);
    }
}

Scanner类的应用