JAVA 文件写入 效率测试

测试写入类

 

/**
  * 测试结果
  * 
  * 1.file's long:16kb
  * 
  fileWrite's time----------36
  outputStreamTest's time----------167
  bufferedOutputTest's time----------17
  bufferedWriteTest's time----------14
  bufferedWrite And FileWriterTest's time----------9
  bufferedWrite And BufferedOutputStreamTest's time----------12
  * 
  * 2.file's long:1600kb
  fileWrite's time----------69
  outputStreamTest's time----------1282
  bufferedOutputTest's time----------68
  bufferedWriteTest's time----------40
  bufferedWrite And FileWriterTest's time----------52
  bufferedWrite And BufferedOutputStreamTest's time----------37
  * 
  * 3.file's long:16000kb
  fileWrite's time----------555
  outputStreamTest's time----------12448
  bufferedOutputTest's time----------599
  bufferedWriteTest's time----------346
  bufferedWrite And FileWriterTest's time----------316

  bufferedWrite And BufferedOutputStreamTest's time----------358
  
  4.file's long:160000kb
  
  fileWrite's time----------5203
  outputStreamTest's time----------127182
  bufferedOutputTest's time----------5972
  bufferedWriteTest's time----------3445        最优
  bufferedWrite And FileWriterTest's time----------5904
  bufferedWrite And BufferedOutputStreamTest's time----------5353
  
  
  5.file's long:1600000kb
  
  fileWrite's time----------50416
  outputStreamTest's time----------1303242
  bufferedOutputTest's time----------60931
  bufferedWriteTest's time----------46697
  bufferedWrite And FileWriterTest's time----------48710
  bufferedWrite And BufferedOutputStreamTest's time----------64354
  */

 public static void main(String[] args) {

  String str = "abcdefghiJKLMN！";
  int count = 1000000;
  TestOutputStream t = new TestOutputStream();
  long start = System.currentTimeMillis();
  t.fileWriteTest(count, str);
  long end = System.currentTimeMillis();