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法律研究如何在 JDBC 中将日期值转换为字符串？
java.sql.Date 类的 toString() 方法返回日期对象的转义格式：yyyy-mm-dd。通过此方法，你可以将日期对象转换为字符串。
Date date = rs.getDate("Dispatch_Date");
date.toString());假设我们有一个名为 dispatch_data 的表，共有 3 条记录，如下所示
+--------------+------------------+---------------+----------------+ | Product_Name | Name_Of_Customer | Dispatch_Date | Location | +--------------+------------------+---------------+----------------+ | KeyBoard | Amith | 1981-12-05 | Hyderabad | | Ear phones | Sumith | 1981-04-22 | Vishakhapatnam | | Mouse | Sudha | 1988-11-05 | Vijayawada | +--------------+------------------+---------------+----------------+
下面的 JDBC 程序将与数据库建立连接，检索 dispatch_data 表的内容，然后使用 toString() 方法将日期对象转换为字符串值，最后显示表的内容和日期值（已被转换为字符串格式）。
import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class DateToString {
public static void main(String args[])throws Exception {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql:///mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//Creating a Statement object
Statement stmt = con.createStatement();
//Creating Statement object
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select * from dispatch_data");
//Retrieving values
while(rs.next()) {
System.out.println("Product Name: "+rs.getString("Product_Name"));
System.out.println("Name Of The Customer: "+rs.getString("Name_Of_Customer"));
//Retrieving the date
Date date = rs.getDate("Dispatch_Date");
//Converting Date object to String
System.out.println("Date: "+date.toString());
System.out.println();
}
}
}输出
Connection established...... Product Name: KeyBoard Name Of The Customer: Amith Date: 1981-12-05 Product Name: Ear phones Name Of The Customer: Sumith Date: 1981-04-22 Product Name: Mouse Name Of The Customer: Sudha Date: 1988-11-05
更新于： 2019-07-30
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