val path = Paths.get("src/TestJava.java");
    var stream = Files.newInputStream(path)
   stream.buffered(1024).reader(Charsets.UTF_8).use {

        reader-> println("current:${reader.readText()}");//一次读完
    }

只读入一行

stream.buffered(1024).reader(Charsets.UTF_8).useLines { reader ->
        var iterator = reader.iterator()
        while (iterator.hasNext()) {
            println("current:${iterator.next()}");


        }
    }
···