JavaSE I/O 输出字节流 OutputStream

package com.javaIO.file;

import java.io.FileOutputStream;
import java.io.OutputStream;

public class FileOutputStreamTest {

public static void main(String[] args) throws Exception {

OutputStream os = new FileOutputStream("e:/newOut.txt");

String str = "asdfghjhklmnbv i'm already been there before.";

byte[] buffer = str.getBytes();

os.write(buffer);

os.close();
}
}

实例二：

package com.javaIO.file;

import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;

public class FileOutputStreamTest {

public static void main(String[] args) throws Exception {

OutputStream os = new FileOutputStream("e:/newOut3.txt");

DataOutputStream dos = new DataOutputStream(
new BufferedOutputStream(os)); // 装饰模式 ，给dos对象附加功能。

String str = "hey man.";

byte[] buffer = str.getBytes();

dos.write(buffer); //写入到流中

dos.close();

}
}