Testing time processing

package jdbc;
import java.io.DataInputStream;
import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.Random;

import com.mysql.fabric.xmlrpc.base.Data;


public class g_Date {

	/**
	 * 1.测试时间处理Date和Timestamp
	 * 2.插入随机日期
	 * 
	 * java.util.Date
	 * -子类：java.sql.Date  表示年月日
	 * -子类：java.sql.Time  表示时分秒
	 * -子类：java.sql.Timestamp  表示年月日时分秒
	 * 
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Connection conn=null;
		PreparedStatement ps1=null;
		try { 
			Class.forName("com.mysql.jdbc.Driver");
			conn=DriverManager.getConnection("jdbc:mysql://localhost:3307/TestJdbc","root","123456");
			
			for(int i=0;i<1000;i++){
				ps1=conn.prepareStatement("insert into t_user (username,pwd,regTime,lastLoginTime) values(?,?,?,?)");
				ps1.setObject(1, "test");
				ps1.setObject(2, "123456");
				
				//插入随机日期
				int rand=100000000+new Random().nextInt(1000000000);
				
				Date date=new Date(System.currentTimeMillis()-rand);
				ps1.setDate(3, date);
				Timestamp stamp=new Timestamp(System.currentTimeMillis()-rand);
				ps1.setTimestamp(4, stamp);
				ps1.execute();
			}
	
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			if(conn!=null){
				try {
					conn.close();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}

	}

}

package jdbc;
import java.security.interfaces.RSAKey;
import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;




/**
 * 取出指定时间段数据
 * @param args
 */

public class h_QueryDate {
	
	/**
	 * 将字符串代表的日期转为long数字（格式：yyyy-MM-dd hh:mm:ss）
	 * @param args
	 */
	public static long StrToDate(String dateStr){
		 DateFormat format=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
		 try {
			return format.parse(dateStr).getTime();
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return 0;
		}
	}
	

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Connection conn=null;
		PreparedStatement ps=null;
		ResultSet rs=null;
		
		try {
			Class.forName("com.mysql.jdbc.Driver");
			conn=DriverManager.getConnection("jdbc:mysql://localhost:3307/TestJdbc","root","123456");
			
		    ps=conn.prepareStatement("select * from t_user where regTime>? and regTime<? order by regTime");
		    
		    Date start=new Date(StrToDate("2019-6-09 10:23:45"));
		    Date end=new Date(StrToDate("2019-6-15 10:23:45"));
		    
		    ps.setObject(1, start);
		    ps.setObject(2, end);
		    
		    rs=ps.executeQuery();
		    while(rs.next()){
		    	System.out.println(rs.getInt("id")+"---"+rs.getString("username")+"---"+rs.getDate("regTime"));
		    }
		    
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		

	}

}