小木的学习笔记
public void method1() { FileWriter fw = null; try { //如果文件存在,则追加内容;如果文件不存在,则创建文件 File file = new File("E:\\test.txt"); fw = new FileWriter(file, true); } catch (IOException e) { e.printStackTrace(); } PrintWriter pw = new PrintWriter(fw); pw.println("追加内容"); pw.flush(); try { fw.flush(); pw.close(); fw.close(); } catch (IOException e) { e.printStackTrace(); } }
public static void method2(String file, String conent) { BufferedWriter out = null; try { out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true))); out.write(conent+"\r\n"); } catch (Exception e) { e.printStackTrace(); } finally { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } }
public static void method3(String fileName, String content) { try { // 打开一个随机访问文件流,按读写方式 RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw"); // 文件长度,字节数 long fileLength = randomFile.length(); // 将写文件指针移到文件尾。 randomFile.seek(fileLength); randomFile.writeBytes(content+"\r\n"); randomFile.close(); } catch (IOException e) { e.printStackTrace(); } }