1 1、日期格式化 2 Date date=new Date(); 3 //转换成时间格式12小时制 4 SimpleDateFormat df_12=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); 5 6 //转换成时间格式24小时制 7 SimpleDateFormat df_24=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 8 9 System.out.println("12小时制时间::"+df_12.format(date)); 10 System.out.println("24小时制时间::"+df_24.format(date)); 11 12 13 2、过滤文件名非法字符 14 private static Pattern FilePattern = Pattern.compile("[\\\\/:*?\"<>|]"); 15 public static String filenameFilter(String str) { 16 return str==null?null:FilePattern.matcher(str).replaceAll(""); 17 } 18 19 3、读取文件内容 20 public static String readFile(String filePath) throws Exception{ 21 File file = new File(filePath); 22 BufferedReader in = null; 23 String result = ""; 24 String str = ""; 25 try { 26 in = new BufferedReader(new FileReader(file)); 27 while((str = in.readLine()) != null){ 28 result += str; 29 } 30 in.close(); 31 } catch (Exception e) { 32 e.printStackTrace(); 33 } 34 return result; 35 } 36
