jdbc mysql

package databaseOperate;

public class Person {
	private int perId;
	private String name;
	private String addr;
	
	public int getPerId() {
		return perId;
	}
	public Person(String name, String addr) {
		super();
		this.name = name;
		this.addr = addr;
	}
	@Override
	public String toString() {
		return "Person [perId=" + perId + ", name=" + name + ", addr=" + addr
				+ "]";
	}
	public void setPerId(int perId) {
		this.perId = perId;
	}
	public Person(int perId, String name, String addr) {
		super();
		this.perId = perId;
		this.name = name;
		this.addr = addr;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getAddr() {
		return addr;
	}
	public void setAddr(String addr) {
		this.addr = addr;
	}
}

package databaseOperate;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


public class MysqlCon {
	private Connection con;
	private PreparedStatement ps;
	private static final String URL="jdbc:mysql://localhost:3306/hibernate";
	public static void main(String[] args) {
//		new MysqlCon().updatePerson(new Person(2,"mm","beijing"));
		new MysqlCon().findAllPerson();
	}
	public void findAllPerson(){
		List<Person> list=new ArrayList<Person>();
		try {
			Class.forName("com.mysql.jdbc.Driver");
			con=DriverManager.getConnection(URL,"root","123");
			ps=con.prepareStatement("select * from t_person");
			ResultSet rs=ps.executeQuery();
			
			while(rs.next()){
				Person p=new Person(rs.getInt(1),rs.getString(2),rs.getString(3));
				list.add(p);
			}
			con.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		for(Person p:list){
			System.out.println(p);
		}
	}
	public void updatePerson(Person p){
		try {
			Class.forName("com.mysql.jdbc.Driver");
			con=DriverManager.getConnection(URL,"root","123");
			ps=con.prepareStatement("update t_person set perName=?,addr=? where perId=?");
			ps.setString(1,p.getName());
			ps.setString(2,p.getAddr());
			ps.setInt(3,p.getPerId());
			ps.execute();
			con.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
	public void deletePerson(Person p){
		try {
			Class.forName("com.mysql.jdbc.Driver");
			con=DriverManager.getConnection(URL,"root","123");
			ps=con.prepareStatement("delete from t_person where perId=?");
			ps.setInt(1,p.getPerId());
			ps.execute();
			con.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
	public void savePerson(Person p){
		try {
			Class.forName("com.mysql.jdbc.Driver");
			con=DriverManager.getConnection(URL,"root","123");
			ps=con.prepareStatement("insert into t_person(perName,addr) values(?,?)");
			ps.setString(1,p.getName());
			ps.setString(2,p.getAddr());
			ps.execute();
			con.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
}