OutputStream

import java.io.*;
public class OutputStr
{
public static void main(String[] args) throws Exception
{
File file = new File("D:\\temp","write.txt");
OutputStream os = new FileOutputStream(file);
//    os.write(89); //参数是 int类型
String str = "haahahahah";
os.write(str.getBytes());
os.flush();//清空缓存
os.close();
}
}