jdbc中的日期类型问题

package cn.itcast.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Date;

public class DateTest {

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

//      create("name2", new Date(), 500f);
        Date d=read(5);
        System.out.println(d);
    }

    static void create(String name, Date birthday, float money)
            throws SQLException {
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        try {
            conn = JdbcUtils.getConnection();

            String sql = "insert into user(name,birthday,money)values(?,?,?)";
            ps = conn.prepareStatement(sql);
            ps.setString(1, name);
            ps.setDate(2, new java.sql.Date(birthday.getTime())); // 转换，将java.util中的Date转换称java.sql中的Date
            ps.setFloat(3, money);

            int i = ps.executeUpdate();

            System.out.println("i=" + i);

        } finally {
            JdbcUtils.free(rs, ps, conn);
        }
    }

    static Date read(int id) throws SQLException {
        Connection conn = null;
        Statement st = null;
        ResultSet rs = null;
        Date birthday=null;

        try {
            conn = JdbcUtils.getConnection();

            st = conn.createStatement();

            rs = st.executeQuery("select birthday from user where id="+id);

            while (rs.next()) {
            birthday=new Date(rs.getDate("birthday").getTime());    //转换时间，子类赋给父类，也可以不转换
//          birthday=rs.getDate("birthday");
            }

        } finally {
            JdbcUtils.free(rs, st, conn);
        }
        return birthday;
    }
}

注意第31行和第57行的Date转换

JdbcUtils