DAO及factory示例
=============Student.Java==========
import java.sql.*;
public class Student implements java.io.Serializable{
private String id;
private String name;
private Date birthday;
public Student(){}
public Student(String id, String name, Date birthday){
this.id = id;
this.name = name;
this.birthday = birthday;
}
public String getId() { return id; }
public void setId(String id) { this.id = id; }
public String getName() { return name; }
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