Kotlin Files Paths write ByteArray writeString写多行BufferedWriter

Kotlin Files Paths write ByteArray writeString写多行BufferedWriter 

import java.nio.file.Files
import java.nio.file.Paths
import java.nio.file.StandardOpenOption
 
fun main(args: Array<String>) {
    val filePath = "./myfile.txt"
    val path = Paths.get(filePath)
 
    val bytes: ByteArray = "hello,".toByteArray() //覆盖写文件
    Files.write(path, bytes)
 
    val string: String = "world!"
    Files.writeString(path, string, StandardOpenOption.APPEND) //原文件追加
 
    val bufferedWriter = Files.newBufferedWriter(path, StandardOpenOption.APPEND)
    bufferedWriter.newLine() //换行
    bufferedWriter.flush()
 
    var lines = mutableListOf()
    repeat(3) {
        lines.add(it.toString())
    }
    Files.write(path, lines, StandardOpenOption.APPEND) //写入多行
 
    bufferedWriter.write("2023")
    bufferedWriter.flush() //预备写的数据在内存，flush流，写入本地。
    bufferedWriter.close()
 
    //打印文件全部内容
    println(Files.readString(path))
}

hello,world!
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1
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2023

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