Java中I/O的OutputStream流

1. Java中I/O的OutputStream流

1. 使用OutputStream流输出文件
OutputStream os = new FileOutputStream("c:\\out.txt", true); 
    true时在后面追加；
    false时在开头重写。
import java.io.FileOutputStream;
import java.io.OutputStream;
public class OutputStreamTest1 {
    public static void main(String[] args) throws Exception{
        OutputStream os = new FileOutputStream("c:\\out.txt", true);
        String str = "aaaaa";
        byte[] buffer = str.getBytes();
        os.write(buffer);
        os.close();
    }
}

2. 使用BufferedOutputStream流
如果不关闭流，数据就不会写到文件中。(文件会保存到项目根目录中)
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
public class BufferedOutputStreamTest1{
    public static void main(String[] args) throws Exception{
        OutputStream os = new FileOutputStream("1.txt");
        BufferedOutputStream bos = new BufferedOutputStream(os);
        bos.write("http://www.google.com".getBytes());
        bos.close();
        os.close();
    }
}