import java.io.File;
import java.io.FileOutputStream;
import java.io.*;
public class FileTest {
      public FileTest() {
      }
      public static void main(String[] args) {
            FileOutputStream out = null;
            FileOutputStream outSTr = null;
            BufferedOutputStream Buff=null;
            FileWriter fw = null;
            int count=1000;//写文件行数 
            try {
                  out = new FileOutputStream(new File(“C:/add.txt”));
                  long begin = System.currentTimeMillis();
                  for (int i = 0; i < count; i++) {
                        out.write(“测试java 文件操作\r\n”.getBytes());
                  }
                  out.close();
                  long end = System.currentTimeMillis();
                  System.out.println(“FileOutputStream执行耗时:” + (end - begin) + ” 豪秒”);
                  outSTr = new FileOutputStream(new File(“C:/add0.txt”));
                  Buff=new BufferedOutputStream(outSTr);
                  long begin0 = System.currentTimeMillis();
                  for (int i = 0; i < count; i++) {
                        Buff.write(“测试java 文件操作\r\n”.getBytes());
                  }
                  Buff.flush();
                  Buff.close();
                  long end0 = System.currentTimeMillis();
                  System.out.println(“BufferedOutputStream执行耗时:” + (end0 - begin0) + ” 豪秒”);
                  fw = new FileWriter(“C:/add2.txt”);
                  long begin3 = System.currentTimeMillis();
                  for (int i = 0; i < count; i++) {
                        fw.write(“测试java 文件操作\r\n”);
                  }
                  fw.close();
                  long end3 = System.currentTimeMillis();
                  System.out.println(“FileWriter执行耗时:” + (end3 - begin3) + ” 豪秒”);
            } catch (Exception e) {
                  e.printStackTrace();
            }
            finally {
                  try {
                        fw.close();
                        Buff.close();
                        outSTr.close();
                        out.close();
                  } catch (Exception e) {
                        e.printStackTrace();
                  }
            }
      }
}

该贴由system转至本版2014-9-19 21:37:29