import java.io.*;




public class FileTest {
	String path = "C:\\Users\\Desktop\\test.txt";
	File f = new File(path);
	private void writeFile() throws IOException {
		
		//構建FileOutputStream物件,檔案不存在會自動新建
		FileOutputStream fop = new FileOutputStream(f);
		
		// 構建OutputStreamWriter物件,引數可以指定編碼"UTF-8";不設定，預設為作業系統預設編碼;
		OutputStreamWriter writer = new OutputStreamWriter(fop, "UTF-8");
		
		//寫入緩衝區
		writer.append("該類用來建立一個檔案並向檔案中寫資料。\r\n如果該流在開啟檔案進行輸出前，目標檔案不存在，那麼該流會建立該檔案。\r\n");
		writer.append("tvmain: [2102][ 3034.174501] DTL: recording: [recording.cpp 1355 readTSData()] res:0, available:872865792");
		
		// 關閉寫入流,同時會把緩衝區內容寫入檔案
		writer.close();
		
		//關閉輸出流，釋放系統資源
		fop.close();
	}

	private void readFile()throws IOException {
		
		FileInputStream fip = new FileInputStream(f);
		InputStreamReader reader = new InputStreamReader(fip, "UTF-8");
		StringBuffer sb = new StringBuffer();
		while(reader.ready()){
			//將讀取的資料轉化成char型別，加入StringBuffer物件sb裡
			sb.append((char)reader.read());
			
		}
		//將sb物件內容轉化成string型別，輸出
		System.out.println(sb.toString());
		
		//關閉讀取流
		reader.close();
		
		//關閉輸入流，釋放系統資源
		fip.close();
	}

	public static void main(String[] args)throws IOException {
		//建立物件
		FileTest test = new FileTest();
		
		//先把資料寫入檔案，後讀再讀取檔案，在控制檯輸出
		test.writeFile();
		test.readFile();
				
	}
	

}