2019年1月24日-数据存储练习（Javabean）

将表格中的数据存储在List中，将同一种数据包装在一个实体类中，作为一个Object对象存储在List中

ID	姓名	薪水	单位	入职时间
0301	高淇	3000	尚学堂项目部	2007-09
0302	马士兵	3100	尚学堂教学部	2006-11
0303	裴新	3500	尚学堂教学部	2006-10

先构建一个Employee的实体类，将数据封装成一个Object对象。

package cn.liu.tree2;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Employee {
   private int id;
   private String name;
   private int salary;
   private  String department;
   private Date hireDate;
   
   
   
			public Employee(int id, String name, int salary, String department, String hireDate) {
						super();
						this.id = id;
						this.name = name;
						this.salary = salary;
						this.department = department;

						DateFormat format = new SimpleDateFormat("yyyy-MM");
						try {
							this.hireDate = format.parse(hireDate);
						} catch (ParseException e) {
							e.printStackTrace();
						}
			}
						
						
						
			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 int getSalary() {
				return salary;
			}
			public void setSalary(int salary) {
				this.salary = salary;
			}
			public String getDepartment() {
				return department;
			}
			public void setDepartment(String department) {
				this.department = department;
			}
			public Date getHireDate() {
				return hireDate;
			}
			public void setHireDate(Date hireDate) {
				this.hireDate = hireDate;
			}
			   
			   
			   
			}

第一种方法：储存在List中。

package cn.liu.tree2;

import java.util.ArrayList;
import java.util.List;

public class test01 {
	public static void main(String[] args) {
		
		Employee e1=new Employee(0301,"高琪",3000,"项目部","2007-10");
		Employee e2=new Employee(0302,"马士兵",3500,"教学部","2007-10");
		Employee e3=new Employee(0303,"裴新",3500,"项目部","2006-10");
		
		List<Employee> list=new ArrayList<Employee>();
		
		list.add(e1);
		list.add(e2);
		list.add(e3);
		
		printEmployeeName(list);
	}
	 
	public static void printEmployeeName(List<Employee> list) {
		for (int i=0;i<list.size();i++) {
			System.out.println(list.get(i).getName());
		}
		
	}

}

第二种方法:存储在map中：

package cn.liu.tree2;

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

public class test02 {
     public static void main(String[] args) {
    	 Map map=new HashMap();
    	 map.put("id", 0301);
    	 map.put("name", "高琪");
    	 map.put("salary", 3000);
    	 map.put("department", "项目部");
    	 map.put("hireDate", "2007-10");
    	 
    	 Map map2=new HashMap();
    	 map2.put("id", 0301);
    	 map2.put("name", "马士兵");
    	 map2.put("salary", 3500);
    	 map2.put("department", "项目部");
    	 map2.put("hireDate", "2007-10");
    	 
    	 Map map3=new HashMap();
    	 map3.put("id", 0303);
    	 map3.put("name", "裴新");
    	 map3.put("salary", 3550);
    	 map3.put("department", "教学部");
    	 map3.put("hireDate", "2006-10");
    	 
    	 List<Map> list =new ArrayList<Map>();
    	 
    	 list.add(map);
    	 list.add(map2);
    	 list.add(map3);
    	  
    	 print(list);
    	 
     }
     
     public static void print(List<Map> list) {
    	 
    	 for(int i=0;i<list.size();i++) {
    		 Map tempmap=list.get(i);
    		 System.out.println(tempmap.get("name")+"--"+tempmap.get("salary"));
    	 }
    	 
     }
}