JDBC完整版实现

Posted 2020-10-27 song.yan

package songyan.jdbc.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collection;

import songyan.jdbc.entity.User;

import com.mysql.jdbc.Driver;

public class Demo1 {
	static Connection conn;
	static Statement sta;
	static ResultSet rs;
	static ArrayList<User> al=new ArrayList<User>();
	public static void main(String[] args)  {
		try {
			Class.forName("com.mysql.jdbc.Driver");
			conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/day06", "root", "247418");
			sta = conn.createStatement();
			rs = sta.executeQuery("select * from users");
			while(rs.next())
			{
				User u=new User();
				u.setId(rs.getInt("id"));
				u.setName(rs.getString("name"));
				u.setPassword(rs.getString("password"));
				u.setEmail(rs.getString("email"));
				u.setBirthday(rs.getDate("birthday"));
				al.add(u);
			}
			for(int i=0;i<al.size();i++)
			{
				System.out.println(al.get(i).getId());
				System.out.println(al.get(i).getName());
				System.out.println(al.get(i).getPassword());
				System.out.println(al.get(i).getEmail());
				System.out.println(al.get(i).getBirthday());
			}			
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if(rs!=null)
			{
				try {
					rs.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
				rs=null;
			}
			if(sta!=null)
			{
				try {
					sta.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
				sta=null;
			}
			
			if(conn!=null)
			{
				try {
					conn.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
				conn=null;
			}
			

		}
		
	}
	
	
}

　　

package songyan.jdbc.entity;

import java.util.Date;

public class User {
	private int id;
	private String name;
	private String password;
	private String email;
	private Date birthday;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	
	
	
	
}