Java tutorial
/** * Copyright 2016 benjobs * <p> * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package com.jredrain.tag; import org.apache.commons.lang3.StringUtils; import com.jredrain.base.utils.DateUtils; import com.jredrain.base.utils.CommonUtils; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * Created by Administrator on 14-3-25. */ public class CronTag { public static String currDayPrevDay(int day) { return DateUtils.getCurrDayPrevDay(day); } /** * ??N * @param date * @param n * @return */ public static String getNextDay(String date, int n) { return DateUtils.getNextDay(date, n); } /** * ??N * @param date * @param n * @return */ public static String getPrevDay(String date, int n) { return DateUtils.getPrevDay(date, n); } public static String substr(Object obj, int index, int end) { return substr(obj, index, end, ""); } public static String substr(Object obj, int index, int end, String tempStr) { if (CommonUtils.isEmpty(obj)) return ""; String str = obj.toString(); if (obj instanceof Date) { str = DateUtils.formatSimpleDate((Date) obj); } else { str = str + ""; } int len = str.length(); if (len > end && index < end) { return str.substring(index, end) + tempStr; } return str; } public static String subwithstr(Object obj, int start, String strx, int index) { if (CommonUtils.isEmpty(obj)) return ""; String str = obj.toString(); if (obj instanceof Date) { str = DateUtils.formatSimpleDate((Date) obj); } else { str = str + ""; } int pos = str.indexOf(strx); if (pos + index < 0) { return str; } return str.substring(start, str.indexOf(strx) + index); } public static String getDate(String date, String format) { // "%Y%m%s"; if (CommonUtils.isEmpty(date)) return ""; SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format); try { return simpleDateFormat.format(DateUtils.parseSimpleDate(date)); } catch (NumberFormatException e) { return ""; } } public static String diffdate(Date date1, Date date2) { if (date1 == null || date2 == null) return "0"; long durationMillisecond = Math.abs(date1.getTime() - date2.getTime()); long day = durationMillisecond / (24 * 60 * 60 * 1000); long hour = (durationMillisecond / (60 * 60 * 1000) - day * 24); long min = ((durationMillisecond / (60 * 1000)) - day * 24 * 60 - hour * 60); long second = (durationMillisecond / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60); StringBuilder ret = new StringBuilder(); if (day > 0L) { ret.append(day).append(""); } if (hour > 0L) { ret.append(hour).append(""); } if (min > 0L) { ret.append(min).append(""); } if (second > 0L) { ret.append(second).append(""); } if (ret.toString().equals("")) { ret.append("<1"); } return ret.toString(); } public static String repinx(Object obj, String str, String replaceStr, int count, int index) { if (CommonUtils.isEmpty(obj)) return ""; if (CommonUtils.isEmpty(str) || count <= 0) return obj.toString(); String args = obj.toString(); if (!args.contains(str)) return args; int ops = args.indexOf(str); if (index < 0) {//?? //fafdsafdsasd@qq.com if (count > ops) { String temp = ""; for (int j = 0; j < ops; j++) { temp += replaceStr; } return temp + args.substring(ops); } else { String str1 = args.substring(0, ops - count); String temp = ""; for (int j = 0; j < count; j++) { temp += replaceStr; } String str3 = args.substring(ops); return str1 + temp + str3; } } else { if (count > ops) { String temp = ""; for (int j = 0; j < args.length() - ops - 1; j++) { temp += replaceStr; } return args.substring(0, ops + 1) + temp; } else { //fdafdafsda@fdsafdsaf String str1 = args.substring(0, ops + 1); String temp = ""; for (int j = 0; j < count; j++) { temp += replaceStr; } String str3 = args.substring(ops + count + 1); return str1 + temp + str3; } } } public static String shiftEnter(String str) { String newStr = str.replaceAll("\r\n", "<br>"); // ?? newStr = newStr.replaceAll(" ", " ");// ? return newStr; } /** * lonngtime? * @param value * @return */ public static String longtimeToDate(String value) { String s = ""; if (StringUtils.isNotBlank(value)) { long time = Long.valueOf(value); Calendar c = Calendar.getInstance(); c.setTimeInMillis(time); SimpleDateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); s = dateformat.format(c.getTime()); } return s; } /** * ??? * @param str * @return */ public static String StrReplaceAll(String str) { if (StringUtils.isNotBlank(str) && str.length() >= 11) { return str.substring(0, 3) + "****" + str.substring(7); } else { return str; } } /** * xxxx-xx?xxxxxx * @param str * @return */ public static String strToDateStr(String str) { if (StringUtils.isNotBlank(str)) { str = str.replace("-", ""); str += ""; return str; } else { return str; } } /** * ?code?4??4?* * @param code * @param len*?? * @return * @author yaohu */ public static String strToCardCode(String code, int len) { String ret = code; if (StringUtils.isNotBlank(code) && code.length() > 8) { String str = ""; if (len <= 0) { len = code.length() - 8; } for (int i = 0; i < len; i++) { str += "*"; } ret = code.substring(0, 4) + str + code.substring(code.length() - 4, code.length()); } return ret; } public static void main(String[] args) { System.out.println(substr("201511071755326105", 0, 12, "...")); } }