java执行写文件_Java写文件

importjava.io.File;importjava.io.FileOutputStream;import java.io.*;public classFileTest {publicFileTest() {

}public static voidmain(String[] args) {

FileOutputStream out= null;

FileOutputStream outSTr= null;

BufferedOutputStream Buff=null;

FileWriter fw= null;int count=1000;//写文件行数

try{//方式一

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rn”.getBytes());

}

out.close();long end =System.currentTimeMillis();

System.out.println(“FileOutputStream执行耗时:”+ (end - begin) +” 豪秒”);//方式二

outSTr= new FileOutputStream(new File(“C:/add0.txt”));

Buff=newBufferedOutputStream(outSTr);long begin0 =System.currentTimeMillis();for (int i = 0; i < count; i++) {

Buff.write(“测试java 文件操作rn”.getBytes());

}

Buff.flush();

Buff.close();long end0 =System.currentTimeMillis();

System.out.println(“BufferedOutputStream执行耗时:”+ (end0 - begin0) +” 豪秒”);//方式三(推荐)

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rn”);

}

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();

}

}

}

}