中継

       public void copyTextFile(){
		FileInputStream fis = null;
		InputStreamReader isr = null;
		BufferedReader br = null;
		
		FileOutputStream fos = null;
		OutputStreamWriter osw = null;
		BufferedWriter bw = null;
		
		try {
			fis = new FileInputStream("./srcDirectory/input.txt"); 
			isr = new InputStreamReader(fis,"UTF-8");
			br = new BufferedReader(isr);
			fos = new FileOutputStream("./copyDirectory/output.txt");
			osw = new OutputStreamWriter(fos,"UTF-8");
			bw = new BufferedWriter(osw);
			String line = "";
			while ((line = br.readLine()) != null) {
				bw.write(line);
				bw.newLine();
			}
		} catch (IOException e) {
			System.out.println("あーあ");
			e.printStackTrace();
		}finally{
			try {
				bw.close();
			} catch (IOException e) {
				System.out.println("あと少しなのにねー");
				e.printStackTrace();
			}
		}
	}

こんだけラップしたら文字化けしないようにはなった。第一歩。メソッドチェインはきらいだ