如何在 Java 中将时间戳转换为日期?

问题描述：

在java中获取计数后如何将'timeStamp'转换为date?

How do I convert 'timeStamp' to date after I get the count in java?

我目前的代码如下:

public class GetCurrentDateTime {

    public int data() {
        int count = 0;
        java.sql.Timestamp timeStamp = new Timestamp(System.currentTimeMillis());
        java.sql.Date date = new java.sql.Date(timeStamp.getTime()); 
        System.out.println(date);
        //count++;

        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/pro", "root", "");

            PreparedStatement statement = con.prepareStatement("select * from orders where status='Q' AND date=CURDATE()");
            ResultSet result = statement.executeQuery();
            while (result.next()) {
                // Do something with the row returned.
                count++; //if the first col is a count.
            }
        } catch (Exception exc) {
            System.out.println(exc.getMessage());
        }

        return count;
    }
}

这是我的数据库:

这里我得到的输出是 2012-08-07 0，但等效的查询返回 3.为什么我得到 0?

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?

答

只需创建一个新的 Date 对象，并将图章的 getTime() 值作为参数.

Just make a new Date object with the stamp's getTime() value as a parameter.

这是一个例子(我使用了当前时间的示例时间戳):

Here's an example (I use an example timestamp of the current time):

Timestamp stamp = new Timestamp(System.currentTimeMillis());
Date date = new Date(stamp.getTime());
System.out.println(date);

如何在 Java 中将时间戳转换为日期?

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