提高寫(xiě)文件的性能的簡(jiǎn)單方法

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提高寫(xiě)文件的性能的一個(gè)簡(jiǎn)單方法，在工作學(xué)習(xí)中會(huì)對(duì)您有幫助，大家多提意見(jiàn)！

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

public class IOTest {

/**

* @param args

*/

public static void main(String[] args) {

long cc=System.currentTimeMillis();

for(int i=0;i< 1000;i++){

test1();

}

cc=System.currentTimeMillis()-cc;

System.out.println("test1="+cc);

cc=System.currentTimeMillis();

for(int i=0;i< 1000;i++){

test2();

}

cc=System.currentTimeMillis()-cc;

System.out.println("test2="+cc);

}

private static void test1()

{

String file="test1.txt";

String message="asdfaksdjfalskdfjalksdjflkasjdfkajsdfkljasdlkfjasdlkfjasdfjalksdjflasdjflasdjflasdfjlasdfjeqoiuiruqnakncaskn asjdfas ffjqwoerj";

FileOutputStream fos=null;

FileChannel fc=null;

try {

fos=new FileOutputStream(file,false);

fc=fos.getChannel();

byte [] src=message.getBytes("GBK");

fc.write(ByteBuffer.wrap(src));

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

finally

{

try {

if(null!=fos)

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

try {

if(null!=fc)

fc.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

private static void test2()

{

String file="test2.txt";

String message="asdfaksdjfalskdfjalksdjflkasjdfkajsdfkljasdlkfjasdlkfjasdfjalksdjflasdjflasdjflasdfjlasdfjeqoiuiruqnakncaskn asjdfas ffjqwoerj";

FileOutputStream fos=null;

try {

fos=new FileOutputStream(file,false);

byte [] src=message.getBytes("GBK");

fos.write(src);

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

finally

{

try {

if(null!=fos)

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

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