Java通用工具类方法
自己写的常用的工具方法，字符串、数组、日期处理 </div>
MyUtilTool
package com.ctb.utils; import java.sql.Timestamp; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.List; import net.sf.json.JSONArray; import org.apache.commons.codec.digest.DigestUtils; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.lang.ArrayUtils; import org.apache.commons.lang.StringUtils; import org.apache.log4j.Logger; public class MyUtilTool { private static Logger logger = Logger.getLogger(MyUtilTool.class); /** * 日期格式参数 * @author 11 */ public static class DATE_PARAM{ public static String STANDARD_DATE = "yyyy-MM-dd HH:mm:ss"; public static String STANDARD_DATE_SIMPLE = "yyyy-MM-dd"; public static String CHN_DATE = "yyyy年MM月dd日 HH时mm分ss秒"; public static String CHN_DATE_SIMPLE = "yyyy年MM月dd日"; } /** * 日期处理工具 * @author 11 */ public static class DATE{ /** * 获取当前时间 * @return */ public static Long getCurrentTime() { return (new Date()).getTime(); } /** * 获取当前日期的格式化字符串 * @param formateStr * @return */ public static String currentDateString(String formateStr) { if (StringUtils.isEmpty(formateStr)) { formateStr = MyUtilTool.DATE_PARAM.STANDARD_DATE; } SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formateStr); try { return simpleDateFormat.format(new Date()); } catch (Exception e) { logger.error("日期格式化异常"); } return null; } /** * 日期格式化 * @param date * @return String */ public static String dateToString(Date date,String formateStr) { if (StringUtils.isEmpty(formateStr)) { formateStr = MyUtilTool.DATE_PARAM.STANDARD_DATE; } SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formateStr); try { return simpleDateFormat.format(date); } catch (Exception e) { logger.error("日期格式化异常"); } return null; } /** * 字符串转换成日期 * * @param dateStr * @return */ public static Date stringToDate(String dateStr,String formateStr) { if (StringUtils.isEmpty(formateStr)) { formateStr = MyUtilTool.DATE_PARAM.STANDARD_DATE; } if (dateStr != null && dateStr.length() > 0) { dateStr = formatDateStr(dateStr); SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formateStr); try { return simpleDateFormat.parse(dateStr); } catch (ParseException e) { logger.error("日期格式化异常"); } } return null; } /** * 格式化日期字符串 * @param dateStr * @return */ private static String formatDateStr(String dateStr){ String[] strs = dateStr.split("-"); String str =""; for (int i = 0; i < strs.length; i++) { String ele = strs[i]; if (i>0) { if (ele.length()==1) { ele = "0"+ele; } str=str+"-"+ele; }else { str=ele; } } return str; } /** * 将SQL DATE类型转换成Date类型 * * @param sqlDate * @return */ public static Date sqlDateToDate(java.sql.Date sqlDate) { long time = sqlDate.getTime(); Date date = new Date(time); return date; } /** * 将Util Date类型转换成为Sql Date * * @return */ public static Timestamp currentDateToSQLTimestamp() { Date date = new Date(); Timestamp timestamp = new Timestamp(date.getTime()); return timestamp; } /** * 将Util Date类型转换成为Sql Date * @param date * @return */ public static Timestamp dateToSQLTimestamp(Date date){ if (date!=null) { Timestamp timestamp = new Timestamp(date.getTime()); return timestamp; } return null; } /** * 将timestamp转换成为Date类型 * @param timestamp * @return Date */ public static Date SQLTimestampToDate(Timestamp timestamp){ if (timestamp!=null) { Date date = new Date(timestamp.getTime()); return date; } return null; } /** * 与系统时间比较 * @param expiredTime * @return boolean */ public static boolean checkExpiredTime(Date expiredTime) { if (expiredTime != null) { Date nowDate = new Date(); if (expiredTime.before(nowDate)) { return true; } else { return false; } } return false; } /** * 日期计算 * @param field * @param calCount * @return */ public static Date calculateDate(Date orgDate,int field,int calCount){ Calendar calendar = Calendar.getInstance(); calendar.setTime(orgDate); calendar.add(field, calCount); orgDate = calendar.getTime(); return orgDate; } /** * 设置修改日期内容 * @param orgDate * @param field * @param setValue * @return */ public static Date calculateSetDate(Date orgDate,int field,int setValue){ Calendar calendar = Calendar.getInstance(); calendar.setTime(orgDate); calendar.set(field, setValue); orgDate = calendar.getTime(); return orgDate; } } /** * 字符串处理工具 * @author 11 */ public static class STRING{ /** * 验证字符串是否为空 * * @param str * @return */ public static boolean checkStrNull(String str) { if (str != null && str.trim().length() > 0) { return false; } else { return true; } } private static final int MAX_GENERATE_COUNT = 99999; private static int generateCount = 0; public static synchronized String getUniqueString() { if (generateCount > MAX_GENERATE_COUNT) generateCount = 0; String uniqueNumber = Long.toString(System.currentTimeMillis()) + Integer.toString(generateCount); generateCount++; return uniqueNumber; } /** * 将字符串中的中文转成nicode码 * @param str * @return */ public static String chineseToUnicode(String str){ String result=""; for (int i = 0; i < str.length(); i++){ int chr1 = (char) str.charAt(i); if(chr1>=19968&&chr1<=171941){//汉字范围 \u4e00-\u9fa5 (中文) result+="\\u" + Integer.toHexString(chr1); }else{ result+=str.charAt(i); } } try { result = new String(result.getBytes(),"utf-8"); } catch (Exception e) { System.out.println("不支持的编码格式"); } return result; } /** * 对字符串进行正则验证 * @param str * @param reg * @return Boolean */ public static Boolean checkStrignReg(String str, String reg) { boolean regCheck = str.matches(reg); return regCheck; } /** * 替换字符 * @param str * @param oldChar * @param newChar * @return */ public static String replace(String str,String oldChar,String newChar){ if (StringUtils.isNotEmpty(str)) { str = str.replace(oldChar, newChar); } return str; } /** * MD5加密字符串 * @param password * @return */ public static String cipherPassword(String password){ String cipherPassword = DigestUtils.md5Hex(password); return cipherPassword; } /** * 取出字符串中含有的空格 * @param str * @return */ public static String removeBlanksInString(String str) { if (str != null && str.trim().length() > 0) { str = str.replace(" ", ""); } return str; } /** * 将字符串分割成为 * @param str * @param sign * @return String[] */ public static String[] seperateStringToStrings(String str, String sign) { if (str != null && str.trim().length() > 0) { if (str.contains(sign)) { return str.split(sign); } } return null; } /** * 将字符串以字符分割 * @param orgStr * @param splitRange * @param sign * @return */ public static String splitWithSign(String orgStr,Integer splitRange,String sign){ if (StringUtils.isNotEmpty(orgStr)) { Integer length = orgStr.length(); if (length > splitRange) { Integer splitNums = length/splitRange; Integer lastMod = length % splitRange; if (lastMod>0) { splitNums = splitNums+1; } String[] results = new String[splitNums]; for (int i = 0; i < splitNums; i++) { Integer startIndex = i*splitRange; Integer endIndex = (i+1)*splitRange; if (endIndex>length) { endIndex = length; } results[i] = orgStr.substring(startIndex,endIndex); } String newStr = ""; int length2 = results.length; if (ArrayUtils.isNotEmpty(results)) { for (int i = 0; i < length2; i++) { if(i==0){ newStr = results[i]; }else { newStr = newStr +sign+ results[i]; } } } return newStr; } } return orgStr; } } /** * 集合类处理工具 * * @author 11 */ public static class COLLECTION { public static Long[] longsListToLongs(List<Long> longList) { if (CollectionUtils.isNotEmpty(longList)) { Long[] longArray = new Long[longList.size()]; for (int i = 0; i < longList.size(); i++) { longArray[i] = longList.get(i); } return longArray; } return null; } public static Object[] objectsListToObjects(List<Object> objList) { if (CollectionUtils.isNotEmpty(objList)) { Object[] array = new Object[objList.size()]; array = objList.toArray(array); return array; } return null; } } public static class ARRAY{ public static boolean checkIntInInts(int[] results, int i) { if (ArrayUtils.isNotEmpty(results)) { for (Integer integer : results) { if (integer > i) { return true; } } } return false; } /** * 验证数组中是否包含不为空的内容 * @param strings * @return */ public static boolean checkStringsAllNull(String...strings){ if (ArrayUtils.isNotEmpty(strings)) { for (String string : strings) { if (StringUtils.isNotEmpty(string)) { return true; } } } return false; } /** * 将Integer类型数组转换成为Long类型数组 * @param orgArrays * @return */ public static Long[] integersToLongs(Integer[] orgArrays){ if (ArrayUtils.isNotEmpty(orgArrays)) { Long[] results = new Long[orgArrays.length]; for (int i = 0; i < orgArrays.length; i++) { results[i] = new Long(orgArrays[i]); } return results; } return null; } /** * 将String类型数组，转换成为Long类型数组 * @param orgArrays * @return */ public static Long[] stringsToLongs(String[] orgArrays){ if (ArrayUtils.isNotEmpty(orgArrays)) { Long[] results = new Long[orgArrays.length]; for (int i = 0; i < orgArrays.length; i++) { results[i] = new Long(orgArrays[i]); } return results; } return null; } /** * 将对象数组转成字符串 * @param array * @return */ public static String objectsToStrings(Object[] array,String sepSign) { if (array != null && array.length > 0) { String result = ""; for (int i = 0; i < array.length; i++) { if (i==0) { result = array[0].toString(); }else { result = result+sepSign+array[i]; } } return result; } return null; } /** * 验证字符串数组中是否存在字符串 * @param strs * @param str * @return Boolean */ public static Boolean checkStringInStrings(String[] strs, String str) { if (strs != null && strs.length > 0) { for (String string : strs) { if (string.equals(str)) { return true; } } } return false; } /** * 对象数组转成字符数组 * @param objArray * @return */ public static String[] objectsToStrings(Object[] objArray) { if (ArrayUtils.isNotEmpty(objArray)) { String[] strArray = new String[objArray.length]; for (int i = 0; i < objArray.length; i++) { strArray[i] = (String) objArray[i]; } return strArray; } return null; } /** * 将字符串数组中的元素合并成为一个字符串 */ public static String comb2Str(String[] strs, String sign) { String combStr = ""; if (strs != null && strs.length > 0) { for (int i = 0; i < strs.length; i++) { combStr = strs[i] + sign + combStr; } } return combStr; } } public static class JSON{ /** * 将JSONArray字符串转成Sting数组 * @param jsonArrayStr * @return */ public static Integer[] jsonArrayToIntegerArray(String jsonArrayStr){ if (StringUtils.isNotEmpty(jsonArrayStr)) { JSONArray jsonArray = JSONArray.fromObject(jsonArrayStr); Integer[] array = new Integer[jsonArray.size()]; array = (Integer[]) jsonArray.toArray(array); return array; } return null; } } public static void main(String[] args) { String value = MyUtilTool.DATE.currentDateString(null); System.out.println(value); } }