使用JavaBean对象存储表格数据

范例：表格内容接上篇

package cn.sxt.collection;

import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
* 测试表格数据的存储
* 体会ORM思想
* 每一行数据使用JavaBean对象存储，多行使用放到map或list中
* @author Administrator
*
*/

public class testStore2 {
public static void main(String[] args) {
User user1 = new User(1001, "张三", 20000, "2018.5.5");
User user2 = new User(1002, "李四", 30000, "2018..4");
User user3 = new User(1003, "王五", 3000, "2020.5.4");

List<User> list = new ArrayList<User>();
list.add(user1);
list.add(user2);
list.add(user3);
for (User u:list) {
System.out.println(u);
}


Map<Integer, User> map = new HashMap<Integer, User>();
map.put(1001, user1);
map.put(1002, user2);
map.put(1003, user3);
Set<Integer> keyset = map.keySet();
for (Integer i:keyset) {
System.out.println(i+"===="+map.get(i));
}
}
}

//一个完整的JavaBean。要有set、get方法以及无参构造器
class User{
private int id;
private String name;
private double salary;
private String date;
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 double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public User(int id, String name, double salary, String date) {
super();
this.id = id;
this.name = name;
this.salary = salary;
this.date = date;
}
public User() {
super();
}

@Override
public String toString() {

return ("id:"+id+",\t姓名："+name+"，\t薪水"+salary+",\t入职日期："+date);
}

}