java集合和文件数据互转

发布时间 2023-12-14 16:53:14作者: 搬砖滴

一、集合到文件

 

package com.itbianma01;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

public class Demo {
    public static void main(String[] args) throws IOException {
        ArrayList<String> array=new ArrayList<>();
        array.add("hello");
        array.add("world");
        array.add("java");
        BufferedWriter bw=new BufferedWriter(new FileWriter("myDemo\\array.txt"));
        for (String s:array){
            bw.write(s);
            bw.newLine();
            bw.flush();
        }
        bw.close();
    }
}

 

二、文件到集合