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如何在 Java 中将时间戳转换为日期？

[英]How to convert TimeStamp to Date in Java?

 原文  2012-08-07 04:25:00  9   18    java/ date/ jdbc/ timestamp

问题描述

How do I convert 'timeStamp' to date after I get the count in Java?在获得 Java 中的计数后，如何将“timeStamp”转换为date ？

My current code is as follows: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;
    }
}

This is my database:这是我的数据库：
在此处输入图像描述

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?这里我得到的 output 是 2012-08-07 0，但等效查询返回 3。为什么我得到 0？

18 个解决方案

解决方案1
 199  2012-08-07 04:29:11

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案2
 41  2013-04-05 14:51:11

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案3
 10  2016-12-08 19:14:54

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案4
 8  2017-04-15 11:04:35

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案5
 6  2018-02-05 01:03:17

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案6
 4  2012-08-07 04:48:08

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案7
 4  2014-09-04 12:14:55

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案8
 4  2018-02-04 13:59:42

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案9
 3  2012-08-07 04:40:53

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案10
 3  2015-06-18 21:05:08

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案11
 3  2015-12-21 16:03:08

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案12
 3  2016-07-13 12:03:02

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案13
 0  2018-03-22 16:51:36

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案14
 0  2019-03-04 12:05:16

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案15
 0  2022-08-06 09:37:47

Date updated = timestamp.toDate();更新日期 = timestamp.toDate();

解决方案16
 0  2022-09-08 14:52:57

import java.sql.Timestamp

new Timestamp(1234567890123L)
// java.sql.Timestamp = 2009-02-14 10:31:30.123

(new Timestamp(1234567890123L)).toLocalDateTime().toLocalDate().toString()
// 2009-02-14

What is a different result from one of the previous most voted answers:与以前投票最多的答案之一有什么不同的结果：

import java.time.format.DateTimeFormatter
import java.time.ZoneId
import java.time.ZoneOffset

(DateTimeFormatter.ISO_LOCAL_DATE).withZone(ZoneId.from(ZoneOffset.UTC)).format(new Timestamp(1234567890123L).toInstant())
// String = 2009-02-13

In my case, I was expecting the "2009-02-14" instead of the "2009-02-13".就我而言，我期待的是“2009-02-14”而不是“2009-02-13”。 So the top result worked better for me.所以最好的结果对我来说效果更好。

解决方案17
 -1  2014-03-10 09:37:54

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

解决方案18
 -3  2015-01-20 10:51:42

How do I convert 'timeStamp' to date after I get the count in java?在Java中获得计数后，如何将“ timeStamp”转换为date ？

My current code is as follows:我当前的代码如下：

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;
    }
}

This is my database:这是我的数据库：在此处输入图片说明

Here the output I got was 2012-08-07 0, but the equivalent query returns 3. Why do I get 0?在这里，我得到的输出是2012-08-07 0，但是等效查询返回3。为什么我得到0？

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