[Java] 데이터 입출력

바이트 입출력 // 문자 동일

(try catch)
InputStream is = new FileInputStream("파일경로");
OutputStream os = new FileOutputStream("파일경로");

byte[] array = new byte[1024];
while(true) {
	int num = is.read(data)
    if (num == -1) break;
    os.write(array, 0, num);
}

os.flush();
os.close();
is.close();

 

 

보조 스트림

// InputStream To Reader
Reader reader = new InputStreamReader(new FileInputStream("경로"));

// OutputStream To Writer
Writer write = new OutputStreamWriter(new FileOutputStream("경로"))

 

 

성능 향상 스트림

BufferedInputStream bis = new BufferedInputStream(new FileInputStream("경로"))
BufferedOutputStream bos = new BufferedOutputStream(new BufferedOutputStream("경로"))
BufferedReader br = new BufferedReader(new FileReader("경로"))

 

 

기본 타입 스트림

DataOutputStream dos = new DataOutputStream(new FileOutputStream("경로"))
DataInputStream dos = new DataInputStream(new FileInputStream("경로"))

 

 

프린트 스트림

PrintSTream ps = new PrintStream(new FileOutputStream("경로"))

 

 

객체 스트림

// 객체에 Serializable implements 필요
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("경로"));
ObjectInputStream oos = new ObjectInputStream(new FileInputStream("경로"));