數據表結構：

1、實例：生成時間戳數據

package com.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Test {


    public static void main(String[] args) {
         
         Connection conn;
         Statement stmt;
         ResultSet rs;
         String url 
 
= "jdbc:sqlserver://localhost:1433;DatabaseName=test;";
         String sql = "insert into student(id,name,date) values (";
         try {
             conn = DriverManager.getConnection(url, "sa", "Rfid123456");
             stmt = conn.createStatement();
             int id = 0;
             String name 
 
= "wang";
             Long date = System.currentTimeMillis();
             
             for(int i = 0 ; i<100; i++){
                 id ++;
                 date += 100000;
                 StringBuffer sb = new StringBuffer(sql);
                 sb.append(id).append(", ‘").append(name).append("‘ ,").append(date).append(")");
                 System.out.println(sb.toString());
                 stmt.executeUpdate(sb.toString());
             }
             
             
             
             
 
if (stmt != null) {
                 stmt.close();
                 stmt = null;
             }
             if (conn != null) {
                 conn.close();
                 conn = null;
             }
         } catch (SQLException e) {
             e.printStackTrace();
             System.out.println("數據庫連接失敗");
         }
 
         
         
    }
    
}

生成後數據如下：

2、將時間戳轉為date日期格式：

select CONVERT(char(10),DATEADD(second,1507893918807/1000,‘19700101 08:00‘),120) from [test].[dbo].[student]

轉換後如下：

3、實例：取Date的年月日

package com.test;

import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Calendar;

public class Test {


    public static void main(String[] args) {
         
         Connection conn;
         Statement stmt;
         ResultSet rs;
         String url = "jdbc:sqlserver://localhost:1433;DatabaseName=test;";
         String sql = "select CONVERT(char(10),DATEADD(second,1507893918807/1000,‘19700101 08:00‘),120) AS date from [test].[dbo].[student]";
         try {
             conn = DriverManager.getConnection(url, "sa", "Rfid123456");
             stmt = conn.createStatement();
             rs = stmt.executeQuery(sql);
             while(rs.next()){
                 Date date = rs.getDate("date");
                 //日期用Calendar比較好
                 Calendar cal = Calendar.getInstance();
                 cal.setTime(date);
                 
                 int year = cal.get(Calendar.YEAR);
                 System.out.println(year);
                 int month = cal.get(Calendar.MONTH);
                 System.out.println(month + 1);//月份從0開始，所以 +1
                 
             }
             
             if (rs != null) {
                 rs.close();
                 rs = null;
             }
             
             if (stmt != null) {
                 stmt.close();
                 stmt = null;
             }
             if (conn != null) {
                 conn.close();
                 conn = null;
             }
         } catch (SQLException e) {
             e.printStackTrace();
             System.out.println("數據庫連接失敗");
         }
 
         
         
    }
    
}

時間戳 與 Date 的轉換（帶實例）