toString()java.sql.Timestamp类的方法以String变量的形式返回当前Timestamp对象的时间戳的JDBC转义格式。
即，使用此方法可以将Timestamp对象转换为String。
//Retrieving the Time object
Timestamp timestampObj = rs.getTimestamp("DispatchTimeStamp");
//将Time对象转换为String格式
String time_stamp = timestampObj.toString();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');接下来的JDBC程序建立与数据库的连接，并检索dispatches_data表的内容。
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;
public class Timestamp_toString {
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......");
//创建一个Statement对象
Statement stmt = con.createStatement();
//查询以检索dispatches_data表的内容
String query = "select * from dispatches_data";
//执行查询
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
System.out.println("Product Name: " + rs.getString("ProductName"));
System.out.println("Customer Name: " + rs.getString("CustomerName"));
Timestamp timeStampObj = rs.getTimestamp("DispatchTimeStamp");
//将Time对象转换为String格式
String timeStamp = timeStampObj.toString();
System.out.println("Dispatch time stamp in String format: " + timeStamp);
System.out.println("Location: " + rs.getString("Location"));
System.out.println();
}
}
}在这里，在此程序中，在检索列值时，我们已使用toString()Timestamp类的方法将DeliveryTime值从Timestamp对象转换为字符串格式，并尝试显示它。
输出结果
Connection established...... Product Name: Key-Board Customer Name: Raja Dispatch time stamp in String format: 2019-05-04 15:02:45.0 Location: Hyderabad Product Name: Earphones Customer Name: Roja Dispatch time stamp in String format: 2019-06-26 14:13:12.0 Location: Vishakhapatnam Product Name: Mouse Customer Name: Puja Dispatch time stamp in String format: 2019-12-07 07:50:37.0 Location: Vijayawada Product Name: Mobile Customer Name: Vanaja Dispatch time stamp in String format: 2018-03-21 16:00:45.0 Location: Chennai Product Name: Headset Customer Name: Jalaja Dispatch time stamp in String format: 2018-12-30 10:49:27.0 Location: Goa