CommonUtil { public static Date getDate(final Long time) { if (time != null) { return new Date(time); } return null; }  static String messageFormat(final String message, final Object... params); static String getTransactionID(); static String getRandomCode(); static String getRandomNumber(final int size); static String getRandomChar(final int size); static String getString(final Object obj); static String notNullStr(final String str); static Date getDate(final Long time); static Integer[] splitId(final String idStr, final String splitor); static Long[] splitIdsByLong(final String idStr, final String splitor); static Integer[] splitId(final String idStr); static boolean wildcardMatch(final Collection<String> rules, final String matchValue); static boolean wildcardMatch(final String rule, final String matchValue); static boolean match(final String rule, final String matchValue); static String removeAllSymbol(final String str); static String replaceAllBlank(final String str); static String replaceRedundantBlank(final String str); static boolean isNotEmpty(final T[] paramTypes); static boolean isEmpty(final T[] paramTypes);  }
@Test public void getDate() { long time = NUM_10000; Date d = CommonUtil.getDate(time); Assert.equals(time, d.getTime(), ErrorCodeDef.SYSTEM_ERROR_10001); System.out.println("将long类型转化为日期类型"); }