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使用SimpleDateFormat，规定好格式，parser出错即为非法/** * Calculates the number of days between two calendar days in a manner * which is independent of the Calendar type used. * * @param d1 The first date. * @param d2 The second date. * * @return The number of days between the two dates. Zero is * returned if the dates are the same, one if the dates are * adjacent, etc. The order of the dates * does not matter, the value returned is always >= 0. * If Calendar types of d1 and d2 * are different, the result may not be accurate. */static int getDaysBetween (java.util.Calendar d1, java.util.Calendar d2) { if (d1.after(d2)) { // swap dates so that d1 is start and d2 is end java.util.Calendar swap = d1; d1 = d2; d2 = swap; } int days = d2.get(java.util.Calendar.DAY_OF_YEAR) - d1.get(java.util.Calendar.DAY_OF_YEAR); int y2 = d2.get(java.util.Calendar.YEAR); if (d1.get(java.util.Calendar.YEAR) != y2) { d1 = (java.util.Calendar) d1.clone(); do { days += d1.getActualMaximum(java.util.Calendar.DAY_OF_YEAR); d1.add(java.util.Calendar.YEAR, 1); } while (d1.get(java.util.Calendar.YEAR) != y2); } return days;} 返回类别: 教程 上一教程: Google让你突破下载 下一教程: JAVA程序员面试32问 您可以阅读与"使用java.util.Calendar返回间隔天数"相关的教程: · java.util.Calendar的用法。 · java.util.Collection · java中Properties类的使用 · JDK1.5使用总结 --《Java 1.5 Tiger: A Developers Notebook》 · 使用JavaBean创建您的网上日历本 |
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