testbufferedwriter.java

来自「一个很好的Java函数实例」· Java 代码 · 共 47 行

package apibook.c3.s4;

import java.io.*;

//
public class TestBufferedWriter {
  static int READLIMIT=1024;

  public TestBufferedWriter() {
  }
  public static void main(String[] args) {
    try {
      String filename = "TestBufferedReader.txt";
      // 从文件读数据
      BufferedReader bufIn =new BufferedReader(new FileReader(filename));

      String str,str2 = new String();

      //调用mark在文件开始作标记
      if (bufIn.markSupported())
              bufIn.mark(READLIMIT);

      //标准输出
      while((str = bufIn.readLine())!= null)
              System.out.println(str);

      // 打开输出文件
      BufferedWriter bufOut = new BufferedWriter(new FileWriter("TestBufferedWriter.txt"));

      //重置输入流
      bufIn.reset();

      while ((str2 = bufIn.readLine()) != null)
      {
              bufOut.write(str2);
              bufOut.newLine();
      }

      //关闭流
      bufIn.close();
      bufOut.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

}