java(273)时间操作，时间段和日期段查询

package com.imust.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

public class Demo7 {

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

Connection conn = null;
java.sql.PreparedStatement pstl = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/testjdbc", "root", "zzf540266546");
String sql = "select * from t_user where regTime > ? and regTime < ?";
pstl = conn.prepareStatement(sql);
//定义起始时间
java.sql.Date start = new java.sql.Date(str2Date("2017-4-10 10:23:45"));
//定义结束时间
java.sql.Date end = new java.sql.Date(str2Date("2017-4-10 10:23:45"));
pstl.setObject(1, start);
pstl.setObject(2, end);

//方式二
conn.prepareStatement(sql);
Timestamp start1 = new Timestamp(str2Date("2015-4-14 10:10:20"));
Timestamp end1 = new Timestamp(str2Date("2015-4-18 9:9:10"));
pstl.setObject(1, start1);
pstl.setObject(2, end1);

rs = pstl.executeQuery();
while(rs.next()){
System.out.println(rs.getInt("id")+rs.getString("username")+rs.getDate("regTime"));
System.out.println(rs.getInt("id")+rs.getString("username")+rs.getTimestamp("regTime"));
}
}

/**
* 将字符串代表的日期转为long数字(格式 yyyy-MM-dd hh:mm:ss)
* @param dateStr
* @return
*/
public static long str2Date(String dateStr){
DateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
try {
return format.parse(dateStr).getTime();
} catch (ParseException e) {
e.printStackTrace();
return 0;
}

}

}