java集合的运用：控制台简单员工管理系统

控制台员工管理系统 

附上代码 ：

package com.qikai.Day10终极版员工管理系统;

public class Employee {
private int id;
private String name;
private String address;

public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
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 Employee(int id, String name,String address) {
super();
this.id = id;
this.name = name;
this.address=address;
}
@Override
public String toString() {
return "Employee [工号id=" + id + ", 姓名 name=" + name + ",address="+address+"]";
}

}

package com.qikai.Day10终极版员工管理系统;

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

public class T1 {
private static Scanner sc;
public static void main(String[] args) {
showMenu();
List<Employee> list=new ArrayList<Employee>();//初始化一个学生集合；

while(true){
System.out.print("请选择操作：");
sc=new Scanner(System.in);
String item=sc.nextLine();
switch (item) {
case "1":
add(list);   //增加
break;
case "2":
remove(list);
break;
case "3":
update(list);  //modify修改
break;
case "4":
select(list);
break;
case "5":
showAll(list);	//浏览
break;
case "0":
System.out.println("\t退出成功！");
System.exit(0);
default:
System.out.println("输入错误，请重新选择！");
break;
}
}

}

//查询 方法 ；

private static void select(List<Employee> list) {
System.out.println("\t【查询员工】");
System.out.print("\t请输入待查询工号：");
String id=sc.nextLine();
int index=0;
boolean bool=false;
for (Object object : list) {
Employee emp=(Employee)object;
if(Integer.parseInt(id)==emp.getId()){
index=list.indexOf(emp);
bool=true;
System.out.println("\t请稍候...");
System.out.println("\t"+emp.getId()+"\t"+emp.getName()+"\t"+emp.getAddress());
}
}
if(bool) {
System.out.println("\t查询成功！");

} else{
System.out.println("\t请输入正确的工号：");
}
}

//删除 员工方法  ：
private static void remove(List<Employee> list) {
System.out.println("\t【删除员工】");
System.out.print("\t请输入原来工号：");
String oldId=sc.nextLine();
/*		//System.out.print(id);
System.out.print("\t请输入原来姓名：");
String oldName=sc.nextLine();
System.out.print("\t请输入原来地址：");
String oldAddress=sc.nextLine();
*/
int index=0;
boolean bool=false;
for (Object object : list) {
Employee emp=(Employee)object;
if(Integer.parseInt(oldId)==emp.getId()){
index=list.indexOf(emp);
bool=true;
}
}
if(bool) {
list.remove(index);
System.out.println("\t删除成功！");
} else{
System.out.println("\t请输入正确的工号：");
}
}

// 浏览员工方法
private static void showAll(List<Employee> list) {
System.out.println("\t工号\t姓名\t地址");
for (Object object : list) {
Employee emp=(Employee)object;
System.out.println("\t"+emp.getId()+"\t"+emp.getName()+"\t"+emp.getAddress());
}
}

// 增加 员工方法 ：
private static void add(List<Employee> list) {
System.out.println("\t【增加员工】");
System.out.print("\t请输入工号：");
String id=sc.nextLine();
//System.out.print(id);
System.out.print("\t请输入姓名：");
String name=sc.nextLine();
System.out.print("\t请输入地址：");
String address=sc.nextLine();
list.add(new Employee(Integer.parseInt(id),name,address));//增加
System.out.println("\t增加成功！");
}

//  修改员工 方法
private static void update(List<Employee> list) {
System.out.println("\t【修改员工】");
System.out.print("\t请输入原来工号：");
String oldId=sc.nextLine();
//System.out.print(id);
/*System.out.print("\t请输入原来姓名：");
String oldName=sc.nextLine();
System.out.print("\t请输入原来地址：");
String oldAddress=sc.nextLine();
*/

//		int index=list.indexOf(new Employee(Integer.parseInt(oldId),oldName,oldAddress));//同样需要重写equals

int index=0;
boolean bool=false;
for (Object object : list) {
Employee emp=(Employee)object;
if(Integer.parseInt(oldId)==emp.getId()){
index=list.indexOf(emp);
System.out.println("\t请稍候...");
bool=true;    // 验证 工号相等就是等。
}
}
if(bool) {
System.out.print("\t请输入新的工号：");
String id=sc.nextLine();
System.out.print("\t请输入新的姓名：");
String name=sc.nextLine();
System.out.print("\t请输入新的地址：");
String address=sc.nextLine();
list.set(index,new Employee(Integer.parseInt(id),name,address));
System.out.println("\t修改成功！");
} else {
System.out.println("\t请输入正确的工号：");
}
}
public static void showMenu() {
System.out.println("员工管理系统");
System.out.println("========================");
System.out.println("【1】增加");
System.out.println("【2】删除");
System.out.println("【3】修改");
System.out.println("【4】查询");
System.out.println("【5】浏览");
System.out.println("【0】退出");
System.out.println("========================");

}
}