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<String>()
    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!
0
1
2
2023

 

 

 

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