33_io_两个转换流

import java.io._

// InputStreamReader
// 将 字节按照指定 编码集 重新读取
object InputStreamReaderTest extends App {
  // 读取文件
  //1. 创建File + FileInputStream
  val inPath = "/Users/dxm/Desktop/readme.sh"
  private val fis = new FileInputStream(inPath)
  // 指定编码集 编码集必须与写入时的编码集一致,否则会造成乱码
  private val isr = new InputStreamReader(fis, "utf-8")
  // Unicode GBK

  //读取数据
  private var chars = new Array[Char](5)
  private var i: Int = isr.read(chars)
  while (i != -1) {
    print(new String(chars, 0, i))
    i = isr.read(chars)
  }

  //关闭流
  isr.close

}

// OutputStreamWriter
// 将 字节按照指定 编码集 重新读取
object OutputStreamWriterTest extends App {
  val outPath = "sparkcore/src/main/data/newTxt.txt"
  private val fos = new FileOutputStream(outPath)
  private val writer = new OutputStreamWriter(fos, "GBK")

  //写入数据
  Array[String]("abcde\n", "中国中国人\n", "美帝\n").foreach(writer.write)

  //关闭流
  writer.close

}