薪资管理系统（Java面向对象思想）
2024-09-11 03:46:56
package com.test3;
import java.util.*;
import java.io.*;
/**
* @author qingfeng
* 重要思想：面向对象思想（添加员工管理类）
* 功能：公司职员薪水管理系统
*/
public class SalarySystem { public static void main(String[] args) throws IOException { ClerkManager cm = new ClerkManager();//创建员工管理类 InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr); while(true)
{
//简易菜单
System.out.println("公司职员薪水管理系统");
System.out.println("---------------------------------------");
System.out.println("1.添加新员工");
System.out.println("2.根据工号显示该员工的信息");
System.out.println("3.显示所有员工信息");
System.out.println("4.修改员工的薪水");
System.out.println("5.根据工号删除该员工的信息");
System.out.println("6.根据薪资由低到高排序");
System.out.println("7.统计员工的平均工资、最高工资和最低工资");
System.out.println("---------------------------------------");
System.out.println("请选择序号："); String no = br.readLine(); if(no.equals("1")){
System.out.println("添加新员工：");
System.out.println("请输入姓名:");
String name = br.readLine(); System.out.println("请输入性别:");
String sex = br.readLine(); System.out.println("请输入年龄:");//如何用InputStreamReader来输入一个int型的数据
Scanner sc = new Scanner(System.in);
int age = sc.nextInt(); System.out.println("请输入工号:");
String clerkNo = br.readLine(); System.out.println("请输入薪资:");
float salary = Float.parseFloat(br.readLine()); Clerk clerk = new Clerk(name, sex, age, clerkNo, salary);//创建员工对象并且调用构造方法初始化
cm.addClerk(clerk);//调用“添加新员工”方法 }else if(no.equals("2")){
System.out.println("请输入员工号:");
String clerkNo = br.readLine();//接收输入的工号
cm.showInfo(clerkNo); }else if(no.equals("3")){
System.out.println("显示所有员工信息:");
cm.showAllInfo(); }else if(no.equals("4")){
System.out.println("修改员工的薪水:");
System.out.println("输入员工工号:");
String clerkNo = br.readLine();//接收输入的工号
System.out.println("修改员工薪资:");
String sal = br.readLine();
float salary = Float.parseFloat(sal);
cm.modifySal(clerkNo, salary); }else if(no.equals("5")){
System.out.println("根据工号删除该员工的信息:");
System.out.println("输入员工工号:");
String clerkNo = br.readLine();//接收输入的工号
cm.deleteInfo(clerkNo); }else if(no.equals("6")){
System.out.println("根据薪资由低到高排序");
cm.Qsort(0, cm.al.size()-1);
cm.showAllInfo();
}else if(no.equals("7")){
System.out.println("统计员工的平均工资、最高工资和最低工资:");
cm.calSalary();
}else if(no.equals("8")){
System.exit(0);
}else{
System.out.println("输入不合法！");
}
} }
}
//员工管理类（非常重要！面向对象）
class ClerkManager
{
//成员属性
ArrayList al = null; //构造方法：初始化 不断创造新对象
public ClerkManager()
{
al = new ArrayList();//注意写法！！
} //成员方法
//添加新员工!
public void addClerk(Clerk clerk) //注意用增加的对象的引用作为参数！
{
al.add(clerk); //ArrayList添加方法用add()方法！
} //根据工号显示该员工的信息
public void showInfo(String no)
{
int flag = 0;
for(int i=0; i<al.size(); i++)
{
Clerk clerk= (Clerk)al.get(i);
if(clerk.getNo().equals(no))
{
flag = 1;
System.out.println("clerk"+(i+1)+"的信息是：");
System.out.print("姓名:"+clerk.getName());
System.out.print(" 性别:"+clerk.getSex());
System.out.print(" 年龄:"+clerk.getAge());
System.out.print(" 工号:"+clerk.getNo());
System.out.println(" 薪资:"+clerk.getSalary());
}
}
if(flag == 0)
System.out.println("找不到所查工号！");
} //显示所有员工信息
public void showAllInfo()
{
for(int i=0; i<al.size(); i++)
{
Clerk clerk= (Clerk)al.get(i);
System.out.println("clerk"+(i+1)+"的信息是："); System.out.print("姓名:"+clerk.getName());
System.out.print(" 性别:"+clerk.getSex());
System.out.print(" 年龄:"+clerk.getAge());
System.out.print(" 工号:"+clerk.getNo());
System.out.println(" 薪资:"+clerk.getSalary());
}
} //修改员工的薪水
public void modifySal(String no, float sal) //员工编号 最新的薪资
{
int flag = 0;
for(int i=0; i<al.size(); i++)
{
Clerk clerk= (Clerk)al.get(i);
if(clerk.getNo().equals(no))
{
flag = 1;
clerk.setSalary(sal);
}
}
if(flag == 0)
System.out.println("找不到所查工号！");
} //根据工号删除该员工的信息
public void deleteInfo(String no)
{
int flag = 0;
for(int i=0; i<al.size(); i++)
{
Clerk clerk= (Clerk)al.get(i);
if(clerk.getNo().equals(no))
{
flag = 1;
al.remove(i);
}
}
if(flag == 0)
System.out.println("找不到所查工号！");
} //根据薪资由低到高排序
public void Qsort(int left, int right)
{
int i = left;
int j = right; if(i < j)//递归结束条件
{
Clerk clerk = (Clerk)al.get(left);
float key = clerk.getSalary();
while(i<j)//一趟快速排序
{
while(i<j && ((Clerk)al.get(j)).getSalary() >= key)
{
j--;
}
if(i<j)
{
al.set(i,al.get(j));
i++;
}
while(i<j && ((Clerk)al.get(i)).getSalary() <= key)
{
i++;
}
if(i<j)
{
al.set(j, al.get(i));
}
}
al.set(i, clerk);
Qsort(left, i-1);
Qsort(i+1, right);
}
} //统计员工的平均工资、最高工资和最低工资
public void calSalary()
{
float totalSal = 0;
float minSal = ((Clerk)al.get(0)).getSalary();
float maxSal = ((Clerk)al.get(0)).getSalary(); for(int i=0; i<al.size(); i++)
{
Clerk clerk = (Clerk)al.get(i);
totalSal += clerk.getSalary();
if(minSal > clerk.getSalary())
{
minSal = clerk.getSalary();
}
if(maxSal < clerk.getSalary())
{
maxSal = clerk.getSalary();
}
}
System.out.println(al.size()+"个人的平均薪资为：" + totalSal/al.size());
System.out.println(al.size()+"个人的最低薪资为："+minSal);
System.out.println(al.size()+"个人的最高薪资为："+maxSal);
}
}
//员工类
class Clerk
{
private String name;
private String sex;
private int age;
private String no;
private float salary; public Clerk(String name, String sex, int age, String no, float salary)
{
this.name = name;
this.sex = sex;
this.age = age;
this.no = no;
this.salary = salary;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getSex() {
return sex;
} public void setSex(String sex) {
this.sex = sex;
} public int getAge() {
return age;
} public void setAge(int age) {
this.age = age;
} public String getNo() {
return no;
} public void setNo(String no) {
this.no = no;
} public float getSalary() {
return salary;
} public void setSalary(float salary) {
this.salary = salary;
}
}
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