1.IO流

1.组成部分

File、FileInputStream、FileOutStream、FileWriter、FileReader

2.File

pathSeparatorChar ;
separatorChar /

获取:
getAbsolutePath()、getPath()、getName()、length ()
判断：
exists ()、isDirectory ()、isFile ()
创建和删除：
createNewFile()、mkdir()、mkdirs()、delete()
遍历：
list()、listFiles()

3.FileInputStream

FileInputStream fis1 = new FileInputStream("");
byte[] bytes= new byte[1024]
int length
while ((length=fis1.read(bytes))!=-1)
System.out.println(new String(bytes,0,length));

4.FileOutStream

FileOutputStream fos = new FileOutputStream("",true);
byte [] b1 = " comes from life".getBytes();
byte [] b2 = "生活".getBytes("GBK");
fos.write(b1,0,12);
fos.write(b2);
fos.close();

5.FileWriter

FileWriter fw = new FileWriter
String m = "Music";
fw.write(m);
fw.flush();
fw.close();

6.FileReader

FileReader fr = new FileReader
int getChar;
while ((getChar = fr.read()) != -1)
System.out.print((char) getChar);
fr.close();