public class Test {
public static void main(String[] args) throws IOException {
Test test = new Test();
test.outStream();
test.inStream();
test.copyFile();
}
public void copyFile() throws IOException {
FileInputStream fi = new FileInputStream("./demo.txt");
FileOutputStream fo = new FileOutputStream("./demo2.txt");
byte[] bytes = new byte[1024 * 8];
int len;
while ((len = fi.read(bytes)) != -1) {
fo.write(bytes, 0, len);
}
fo.close();
fi.close();
}
public void inStream() throws IOException {
FileInputStream fi = new FileInputStream("./demo.txt");
byte[] bytes = new byte[1024 * 8];
int len = fi.read(bytes);
String string = new String(bytes, 0, len, "UTF-8");
System.out.println(string);
fi.close();
}
public void outStream() throws IOException {
FileOutputStream fo = new FileOutputStream("./demo.txt");
fo.write("又蒙圈了".getBytes("UTF-8"));
fo.close();
System.out.println("写入完成");
}
}
