Java基础-基于List集合的简单员工管理系统

柔光的暖阳◎ 2023-01-01 13:56 246阅读 0赞

## Java基础-基于List集合的简单员工管理系统 ##

> 这里有对员工的查询功能，添加员工功能，修改员工信息功能，删除员工功能。  
> 这里还利用面向对象的思想将每个模块和测试类分开，将员工集合也单独分离出来变成一个类利于维护。

--------------------

**1.创建员工实体类：**

public class Emp { 
        private String id; //员工编号
        private String name;//员工姓名
        private Integer age; //员工年龄
        private String sex; //员工性别
    
        public Emp(String id, String name, Integer age, String sex) { 
            this.id = id;
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
    
        public Emp() { 
        }
    
        public String getId() { 
            return id;
        }
    
        public void setId(String id) { 
            this.id = id;
        }
    
        public String getName() { 
            return name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
        public Integer getAge() { 
            return age;
        }
    
        public void setAge(Integer age) { 
            this.age = age;
        }
    
        public String getSex() { 
            return sex;
        }
    
        public void setSex(String sex) { 
            this.sex = sex;
        }
    
        @Override
        public String toString() { 
            return "Emp{" +
                    "id='" + id + '\'' +
                    ", name='" + name + '\'' +
                    ", age=" + age +
                    ", sex='" + sex + '\'' +
                    '}';
        }
    }

**2.初始化员工集合**

public class EmpList { 
        public static List<Emp> initEmp(){ 
            ArrayList<Emp> emps = new ArrayList<Emp>();
            emps.add(new Emp("001","大龙",30,"男"));
            emps.add(new Emp("002","二龙",31,"男"));
    
            return emps;
        }
    }

**3.对员工操作的业务类：**

public class EmpManage { 
        private Scanner scanner=new Scanner(System.in);
    
        /*查询所有员工的方法*/
        public void selectEmp(List<Emp> emps){ 
            System.out.println("员工编号\t员工姓名\t员工性别\t员工年龄");
            for (Emp emp : emps) { 
                System.out.println(emp.getId()+"\t"+emp.getName()+"\t"+emp.getSex()+"\t"+emp.getAge());
            }
        }
    
        /*添加员工方法*/
        public void addEmp(List<Emp> emps){ 
            System.out.print("请输入要添加的员工编号：");
            while (true){ 
                String id = scanner.next();
                Emp emp = findEmpById(emps, id);
                if(emp==null){ 
                    System.out.print("输入添加员工的姓名：");
                    String name = scanner.next();
                    System.out.print("输入添加员工的性别：");
                    String sex = scanner.next();
                    System.out.print("输入添加员工的年龄：");
                    int age = scanner.nextInt();
                    emps.add(new Emp(id,name,age,sex));
                    System.out.println("添加成功");
                    break;
                }else{ 
                    System.out.print("员工已经存在，重新输入员工编号：");
                }
            }
        }
        /*利用id查询员工方法*/
        public Emp findEmpById(List<Emp> emps,String id){ 
            for (Emp emp : emps) { 
                if(emp.getId().equals(id)){ 
                    return emp;
                }
            }
            return null;
        }
    
        /*修改员工*/
        public void upEmp(List<Emp> emps){ 
            System.out.print("输入需要修改的员工id：");
            while (true) { 
                String id = scanner.next();
                Emp emp = findEmpById(emps, id);
                if(emp!=null){ 
                    System.out.print("输入修改的姓名：");
                    String name = scanner.next();
                    System.out.print("输入修改的性别：");
                    String sex = scanner.next();
                    System.out.print("输入修改的年龄：");
                    int age = scanner.nextInt();
                    emp.setName(name);
                    emp.setSex(sex);
                    emp.setAge(age);
                    System.out.println("修改成功！");
                    break;
                }else{ 
                    System.out.print("员工不存在，请重新输入员工编号：");
                }
            }
        }
    
        /*删除员工*/
        public void delEmp(List<Emp> emps){ 
            System.out.print("请输入需要删除的员工编号：");
            while (true){ 
                String id = scanner.next();
                Emp emp = findEmpById(emps,id);
                if(emp!=null){ 
                    emps.remove(emp);
                    break;
                }else{ 
                    System.out.print("没有此员工，请重新输入员工编号：");
                }
            }
        }
    }

**4.测试类**

public class Test { 
        public static void main(String[] args) { 
            EmpManage empManage = new EmpManage();
            List<Emp> emps = EmpList.initEmp();
    
            while (true){ 
                System.out.println("1，员工列表 2，新增员工 3，修改员工 4，删除员工 5.退出");
    
                System.out.print("请输入要选择的菜单对于的编号：");
                Scanner scanner = new Scanner(System.in);
                String choose = scanner.next();
    
                System.out.println("************");
                if(choose.equals("1")){ 
                    empManage.selectEmp(emps);
                }else if(choose.equals("2")){ 
                    empManage.addEmp(emps);
                }else if(choose.equals("3")){ 
                    empManage.upEmp(emps);
                }else if(choose.equals("4")){ 
                    empManage.delEmp(emps);
                }else{ 
                	System.out.println("退出系统，欢迎下次使用！");
                    break;
                }
                System.out.println("************");
            }
        }
    }

--------------------

**运行结果：**

查询模块：![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70]  
添加模块：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 1]  
**修改员工信息**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 2]  
**删除员工：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 3]  
**退出**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 4]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 1]: /images/20221120/86f9e6062ddf4e59ab01146ca3763f9d.png
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