一、文件读取和写入

 1 try { 2             FileInputStream fis = new FileInputStream(fileName); 3             InputStreamReader isr = new InputStreamReader(fis,"UTF-8"); 4             BufferedReader br = new BufferedReader(isr); 5             String line; 6             StringBuilder sb = new StringBuilder(); 7             while ((line = br.readLine()) != null) 8                 sb = sb.append(line+"\n"); 9             br.close();10             isr.close();11             fis.close();12             return sb.toString();13         } catch (FileNotFoundException e) {14             // TODO Auto-generated catch block15             e.printStackTrace();16         } catch (IOException e) {17             // TODO Auto-generated catch block18             e.printStackTrace();19         }

 1 try { 2             FileOutputStream fos = new FileOutputStream(newFile); 3             OutputStreamWriter osw = new OutputStreamWriter(fos); 4             BufferedWriter bw = new BufferedWriter(osw); 5             bw.write(string); 6             System.out.println("文件写入成功"); 7             bw.close(); 8             osw.close(); 9             fos.close();10         } catch (FileNotFoundException e) {11             // TODO Auto-generated catch block12             e.printStackTrace();13         } catch (IOException e) {14             // TODO Auto-generated catch block15             e.printStackTrace();16         }