java 插入timestamp_Java sql.Timestamp valueOf()方法与示例

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#java 插入timestamp

本文介绍如何使用 Java 的 Timestamp.valueOf 方法将字符串格式的时间戳转换为 Timestamp 对象，并通过一个具体的示例展示了如何在 JDBC 应用中操作 MySQL 数据库表。

java.sql.Timestamp类的valueOf()方法接受表示JDBC转义格式时间戳的String值，并将给定的String值转换为Timestamp对象。Timestamp timeStamp = Time.valueOf("timeStamp_string");

示例

让我们使用CREATE语句在MySQL数据库中创建一个名为dispatches_data的表，如下所示：CREATE TABLE dispatches_data(

ProductName VARCHAR(255),

CustomerName VARCHAR(255),

DispatchTimeStamp timestamp,

Price INT,

Location VARCHAR(255));

现在，我们将使用INSERT语句在dispatches_data表中插入5条记录：insert into dispatches_data values('Key-Board', 'Raja', TIMESTAMP('2019-05-04', '15:02:45'), 7000, 'Hyderabad');

insert into dispatches_data values('Earphones', 'Roja', TIMESTAMP('2019-06-26', '14:13:12'), 2000, 'Vishakhapatnam');

insert into dispatches_data values('Mouse', 'Puja', TIMESTAMP('2019-12-07', '07:50:37'), 3000, 'Vijayawada');

insert into dispatches_data values('Mobile', 'Vanaja' , TIMESTAMP ('2018-03-21', '16:00:45'), 9000, 'Chennai');

insert into dispatches_data values('Headset', 'Jalaja' , TIMESTAMP('2018-12-30', '10:49:27'), 6000, 'Goa');

随后的JDBC程序建立与数据库的连接，并将新记录插入到dispatches_data表中。import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.sql.Timestamp;

public class Timestamp_valueOf {

public static void main(String args[]) throws SQLException {

//注册驱动程序

DriverManager.registerDriver(new com.mysql.jdbc.Driver());

//获得连接

String mysqlUrl = "jdbc:mysql://localhost/mydatabase";

Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");

System.out.println("Connection established......");

//将值插入表

String query = "INSERT INTO dispatches_data VALUES (?, ?, ?, ?, ?)";

PreparedStatement pstmt = con.prepareStatement(query);

pstmt.setString(1, "Watch");

pstmt.setString(2, "Rajan");

Timestamp timestamp = Timestamp.valueOf("2019-04-21 14:17:02.0");

pstmt.setTimestamp(3, timestamp);

pstmt.setInt(4, 4000);

pstmt.setString(5, "Chennai");

pstmt.execute();

//检索数据

Statement stmt = con.createStatement();

ResultSet rs = stmt.executeQuery("select * from dispatches_data");

while(rs.next()) {

System.out.print("Name: "+rs.getString("ProductName")+", ");

System.out.print("Customer Name: "+rs.getString("CustomerName")+", ");

System.out.print("Dispatch Time Stamp: "+rs.getDate("DispatchTimeStamp")+", ");

System.out.print("Price: "+rs.getInt("Price")+", ");

System.out.print("Location: "+rs.getString("Location"));

System.out.println();

}

在这里，在此程序中，我们以String格式获取时间戳记值，并使用valueOf()方法将其转换为java.util.Time对象。

输出结果Connection established......

Name: Key-Board, Customer Name: Raja, Dispatch Time Stamp: 2019-05-04, Price: 7000, Location: Hyderabad

Name: Earphones, Customer Name: Roja, Dispatch Time Stamp: 2019-06-26, Price: 2000, Location: Vishakhapatnam

Name: Mouse, Customer Name: Puja, Dispatch Time Stamp: 2019-12-07, Price: 3000, Location: Vijayawada

Name: Mobile, Customer Name: Vanaja, Dispatch Time Stamp: 2018-03-21, Price: 9000, Location: Chennai

Name: Headset, Customer Name: Jalaja, Dispatch Time Stamp: 2018-12-30, Price: 6000, Location: Goa

Name: Watch, Customer Name: Rajan, Dispatch Time Stamp: 2019-04-21, Price: 4000, Location: Chennai