代码如下：
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import java.util.*; public class Demo { public static void main(String[] args) { EmpManage em = new EmpManage(); while (true) { System.out.println("==================员工管理系统===================="); System.out.println("==================0.加载原有信息=================="); System.out.println("==================1.加入员工====================="); System.out.println("==================2.删除员工====================="); System.out.println("==================3.查询员工信息=================="); System.out.println("==================4.修改员工薪水 =================="); System.out.println("==================5.薪水排序======================"); System.out.println("==================6.平均工资、最低与最高工资======="); System.out.println("==================7.打印全体员工信息=============="); System.out.println("==================8.退出系统====================="); System.out.print("请选择功能【0~8】："); Scanner reader = new Scanner(System.in); int x; x = reader.nextInt(); switch (x) { case 0: Employee e1 = new Employee("2001","轩辕戈",2002f); Employee f = new Employee("2002","季长风",4500f); Employee g = new Employee("2003","鱼幼薇",2560f); Employee h = new Employee("2004","李小龙",1604f); em.addEmp(e1); em.addEmp(f); em.addEmp(g); em.addEmp(h); System.out.println("加载完毕！"); break; case 1: System.out.println("请输入要增加员工的信息(编号，姓名，薪水中间用空格隔开)"); String a, b; float c; a = reader.next(); b = reader.next(); c = reader.nextFloat(); Employee e = new Employee(a, b, c); em.addEmp(e); System.out.println("加入成功！"); break; case 2: System.out.print("请输入要刪除員工的编号："); String y; y=reader.next(); em.deleteEmp(y); System.out.println("删除成功！"); break; case 3: System.out.print("请输入要查询員工的编号："); String z; z=reader.next(); em.showinfo(z); break; case 4: System.out.print("请输入要修改員工的编号："); String w; w=reader.next(); System.out.print("请输入要修改成的工资数目："); float v; v=reader.nextFloat(); em.changesal(w, v); System.out.println("修改成功！"); break; case 5: System.out.println("1.按薪水从高到低的顺序排序"); System.out.println("2.按薪水从低到高的顺序排序"); System.out.print("请选择功能【1~2】："); int t; t=reader.nextInt(); if(t==1) { em.sorthl(); } if(t==2) { em.sortlh(); } break; case 6: em.hlsal(); break; case 7: em.showAll(); break; case 8: System.out.println("程序已经运行结束，下次见！"); System.exit(0); break; default: System.out.print("数字范围只能在1~8之间！"); } } } } //雇员管理类 class EmpManage { private ArrayList al=null; //构造方法 public EmpManage() { al=new ArrayList(); } //加入员工方法 public void addEmp(Employee e) { al.add(e); } //刪除员工 public void deleteEmp(String x) { int i; for(i=0;i<al.size();i++) { Employee temp=(Employee)al.get(i); if(temp.getEmNo().equals(x)) break; } al.remove(i-1); } //根据员工号显示该员工的信息 public void showinfo(String emNo) { //遍历整个ArrayList for(int i=0;i<al.size();i++) { Employee em=(Employee)al.get(i); if(em.getEmNo().equals(emNo)) { System.out.println("编号："+em.getEmNo()+" "+"姓名："+em.getName()+" "+"工资："+em.getSal()); } } } //修改员工的薪水 public void changesal(String x,float y) { for(int i=0;i<al.size();i++) { Employee em=(Employee) al.get(i); if(em.getEmNo().equals(x)) { em.setSal(y); }
}
} //根据员工的薪水进行排序（从高到低） public void sorthl() {
String a,b; float c; for(int i=0;i<al.size()-1;i++) {
Employee e=(Employee)al.get(i); for(int j=i+1;j<al.size();j++) { Employee m=(Employee)al.get(j); if(e.getSal()<m.getSal()) { a=e.getEmNo(); e.setEmNo(m.getEmNo()); m.setEmNo(a);
b=e.getName(); e.setName(m.getName()); m.setName(b);
c=e.getSal(); e.setSal(m.getSal()); m.setSal(c); } }
} System.out.println("排序成功！"); System.out.println("打印信息如下："); showAll(); } //根据员工的薪水进行排序（从低到高） public void sortlh() { String a,b; float c; for(int i=0;i<al.size()-1;i++) {
Employee e=(Employee)al.get(i); for(int j=i+1;j<al.size();j++) { Employee m=(Employee)al.get(j); if(e.getSal()>m.getSal()) { a=e.getEmNo(); e.setEmNo(m.getEmNo()); m.setEmNo(a);
b=e.getName(); e.setName(m.getName()); m.setName(b);
c=e.getSal(); e.setSal(m.getSal()); m.setSal(c); } }
} System.out.println("排序成功！"); System.out.println("打印信息如下："); showAll(); } //平均工资、最高与最低工资 public void hlsal() { float x=0,h,l=0; for(int i=0;i<al.size();i++) { Employee e=(Employee)al.get(i); x=x+e.getSal(); } System.out.println("平均工资："+x/al.size()); Employee s=(Employee)al.get(0); h=s.getSal(); l=s.getSal(); for(int i=0;i<al.size();i++) { Employee v=(Employee)al.get(i); if(v.getSal()>h) h=v.getSal(); if(v.getSal()<l) l=v.getSal(); } System.out.println("最高工资："+h); System.out.println("最低工资："+l); } //显示所有员工的信息 public void showAll() { for(int i=0;i<al.size();i++) { Employee em=(Employee)al.get(i); System.out.println("第"+(i+1)+"个员工: "+"编号："+em.getEmNo()+" "+"姓名："+em.getName()+" "+"工资："+em.getSal()); } } }
//员工类 class Employee { private String emNo; private String name; private float sal;
// 构造方法 public Employee(String emNo, String name, float sal) { super(); this.emNo = emNo; this.name = name; this.sal = sal; }
// 所有的getter和setter方法 public String getEmNo() { return emNo; }
public void setEmNo(String emNo) { this.emNo = emNo; }
public String getName() { return name; }
public void setName(String name) { this.name = name; }
public float getSal() { return sal; }
public void setSal(float sal) { this.sal = sal; } } |
运行示例：
