java从时间戳怎么得到当前时间 Java如何获取当前时间戳的读取
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1\u3001\u9996\u5148\u8981\u660e\u786ejava\u7684\u7c7b\u578b\u5206\u7c7b\uff0c\u6ce8\u610f\u5206\u6790java\u4e2dDate\u53caTimestamp\u65f6\u95f4\u7684\u76f8\u5173\u5185\u5bb9\uff0c\u5728 Java\u7f16\u7a0b\u5f53\u4e2d\uff0c\u4e3b\u8981\u5206\u4e3aJavaSQLDAO\u3001java.util.date\u3001java.sql.date\u3001java.sql.timestamp \u7b49\u51e0\u79cd\u7c7b\u522b\uff0c\u6309\u7167\u5bf9\u5e94\u7684\u7c7b\u522b\u8fdb\u884c\u6b63\u786e\u7684\u7f16\u7a0b\uff0c\u5f97\u5230\u6b63\u786e\u7684\u7cfb\u7edf\u65f6\u95f4\u6570\u636e\u3002
2\u3001\u4ee5\u4e0a\u7c7b\u522b\u5404\u81ea\u8fdb\u884c\u5bf9\u5e94\u7684\u7f16\u7801\uff0cjava.sql.Date\u662f\u6307\u53ea\u5b58\u50a8\u65e5\u671f\u6570\u636e\u4e0d\u5b58\u50a8\u65f6\u95f4\u6570\u636e\uff0c\u6709\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e22\u5931\u65f6\u95f4\u6570\u636e\u7684\u60c5\u51b5\uff0c\u53ef\u901a\u8fc7\u8f93\u5165\u4ee3\u7801preparedStatement.setDate(1, new java.sql.Date(date.getTime()))\u7684\u65b9\u5f0f\u6765\u89e3\u51b3\u3002
3\u3001\u5bf9\u4e8ejava.util.date\u6765\u8bf4\uff0c\u53ef\u4ee5\u8f93\u5165preparedStatement.setTimestamp(1, new java.sql.Timestamp(new java.util.Date().getTime()));\u7684\u4ee3\u7801\u3002
4\u3001\u82e5\u662f\u60f3\u5f97\u5230\u5b8c\u6574\u7684\u6570\u636e\uff0c\u5305\u62ec\u65e5\u671f\u548c\u65f6\u95f4\uff0c\u53ef\u4ee5\u8f93\u5165java.util.Date d = resultSet.getTimestamp(1);\u7684\u4ee3\u7801\u30025\u3001\u5f53\u7136\uff0c\u4e3a\u4e86\u907f\u514d\u4e00\u4e9b\u6f5c\u5728Timestamp \u95ee\u9898 \u7684\u8bdd\uff0c\u53ef\u4ee5\u8f93\u5165java.util.Date d = new java.util.Date(resultSet.getTimestamp(1).getTime());\u7684\u4ee3\u7801\uff0c\u8fd9\u6837\u5904\u7406\u5c06\u4f1a\u66f4\u52a0\u5408\u9002\u4e14\u6709\u6548\u3002
new Date().getTime();
System.currentTimeMillis();
时间戳通常是”yyyyMMddHHmmss“的，举例：
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String str = sdf.format(date);
输出结果：20160830121252。
备注：时间戳中的时间显示格式可以根据实际情况设置即可。
SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
long a=System.currentTimeMillis();//当前毫秒数
Date date=new Date(a);//当前毫秒转换的时间
System.out.println(df.format(date)); //df.format(date) 格式化的时间
//输出 比如 2016-08-30 12:12:10
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