java 简单员工管理系统

package cn.test;

import java.io.*;
import java.util.*;

class Emp {
@Override
public String toString() {
return "Emp [empNo=" + empNo + ", name=" + name + ", salary=" + salary + "]";
}

private String empNo;
private String name;
private float salary;

public Emp(String empNo, String name, float salary) {
this.empNo = empNo;
this.name = name;
this.salary = salary;
}

public String getEmpNo() {
return empNo;
}

public void setEmpNo(String empNo) {
this.empNo = empNo;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public float getSalary() {
return salary;
}

public void setSalary(float salary) {
this.salary = salary;
}
}

//雇员管理类
class EmpManage {
private ArrayList al = null;

// 构造
EmpManage() {
al = new ArrayList();
}

// 添加员工
public void AddEmp(Emp emp) {
al.add(emp);
}

// 删除员工
public void removeEmp(String empNo) {
for (int i = 0; i < al.size(); i++) {
Emp emp = (Emp) al.get(i);
if (emp.getEmpNo().equals(empNo)) {
al.remove(emp);
}
}
}

// 显示员工信息
public void showEmpInfo(String empNo) {
for (int i = 0; i < al.size(); i++) {
Emp emp = (Emp) al.get(i);
// java 中字符串双等是比较地址等不等，因为String也是个引用类型
if (emp.getEmpNo().equals(empNo)) {
System.out.println("get emp info" + emp.toString());
}
}

}

// 修改工资
public void updateEmpSalary(String empNo, float newSalary) {
for (int i = 0; i < al.size(); i++) {
Emp emp = (Emp) al.get(i);
if (emp.getEmpNo().equals(empNo)) {
emp.setSalary(newSalary);
}
}
}

}

public class TestMain {
public static void main(String[] str) throws Exception {
EmpManage empManager = new EmpManage();

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
while (true) {
System.out.println("请选择你要进行的操作");
System.out.println("1.添加员工雇员");
System.out.println("2.查找雇员");
System.out.println("3.修改雇员工资");
System.out.println("4.删除雇员");
System.out.println("5.退出系统");
String type = br.readLine();
String empNo;
String name;
float salary;
switch (Integer.parseInt(type)) {
case 1:
System.out.println("请输入员工编号");
empNo = br.readLine();
System.out.println("请输入员工姓名");
name = br.readLine();
System.out.println("请输入员工工资");
salary = Float.parseFloat(br.readLine());

Emp emp = new Emp(empNo, name, salary);
empManager.AddEmp(emp);
break;
case 2:
System.out.println("请输入员工编号");
empNo = br.readLine();
empManager.showEmpInfo(empNo);
break;
case 3:
System.out.println("请输入员工编号");
empNo = br.readLine();
System.out.println("请输入员工工资");
salary = Float.parseFloat(br.readLine());
empManager.updateEmpSalary(empNo, salary);
break;
case 4:
System.out.println("请输入员工编号");
empNo = br.readLine();
empManager.removeEmp(empNo);
break;
case 5:
System.out.println("退出系统");
System.exit(0);;
default:
break;
}
}
}
}