本文实例为大家分享了java实现人员信息管理系统的具体代码，供大家参考，具体内容如下
实现增删改查.
java入门的练手小程序
1.Person类
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package p1;
public class Person { // Person属性 private int num; private String name; private String sex; private int salary;
public Person( int num, String name, String sex, int salary) { super (); this .num = num; this .name = name; this .sex = sex; this .salary = salary; }
// 对Perosn操作的方法 public int getNum() { return num; }
public void setNum( int num) { this .num = num; }
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 getSalary() { return salary; }
public void setSalary( int salary) { this .salary = salary; }
} |
2.SysMenu类
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package p1;
public class SysMenu { public static final String[] MENU = { "1.员工信息管理" , "2.退出" }; public static final String[] OPERATION_MENU = { "1.新增" , "2.查看" , "3.修改" , "4.删除" , "5.返回" };
public static void showMenu(String[] Menu) { for ( int i = 0 ; i < Menu.length; i++) System.out.print(Menu[i] + "\t\t" ); System.out.println(); System.out.println( "---------------------------------------" ); } } |
3.SysInfo类
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package p1;
import java.util.ArrayList; import java.util.List;
public class SysInfo { private static List informationList = new ArrayList();
// 获取 informationList public static List getList() { return informationList; } } |
4.InformationService类
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package p1;
import java.util.List;
public class InformationService { private List informationList = SysInfo.getList();
// 获取信息列表 public List getList() { return informationList; }
// 按编号查找信息 public Person getPersonByNum( final int num) { if (num < 1 ) { System.out.println( "编号错误" ); return null ; }
for ( int i = 0 ; i < informationList.size(); i++) { Person p = (Person) informationList.get(i); if (p.getNum() == num) { System.out.println( "查找成功" ); return p; } } System.out.println( "查找失败" ); return null ; }
//查看单一Person信息 public void showAPerson(Person p) { System.out.println( "编号\t\t姓名\t\t性别\t\t薪水" ); System.out.println(p.getNum()+ "\t\t" + p.getName() + "\t\t" + p.getSex() + "\t\t" + p.getSalary()); } //show all Person public void showPerson() { System.out.println( "编号\t\t姓名\t\t性别\t\t薪水" );
List ps = getList(); for ( int i = 0 ; i < ps.size(); i++) { Person p = (Person) ps.get(i); System.out.println(p.getNum() + "\t\t" + p.getName() + "\t\t" + p.getSex() + "\t\t" + p.getSalary()); } }
// 按名字查找信息 public Person getPersonByName( final String name) { if (name == null ) return null ; for ( int i = 0 ; i < informationList.size(); i++) { Person p = (Person) informationList.get(i); if (p.getName().equals(name)) { return p; } } return null ; }
//检查对象是否存在 public boolean CheckExitByNum( int num) { for ( int i= 0 ;i<informationList.size();i++) { Person p = (Person)informationList.get(i); if (p.getNum()==num) return true ; } return false ; }
//save Person public void savePerson(Person p) { p.setNum(getPersonMaxInt()+ 1 ); informationList.add(p); }
// 查找最大编号 public int getPersonMaxInt() { int max = 0 ; for ( int i = 0 ;i<informationList.size();i++) { Person p =(Person)informationList.get(i); if (max < p.getNum()) max = p.getNum(); } return max; } } |
5.SysRun类
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package p1;
import java.util.InputMismatchException; import java.util.List; import java.util.Scanner;
public class SysRun { private List informationList = SysInfo.getList(); private Scanner s = new Scanner(System.in); private InformationService is = new InformationService();
// 系统运行类 public static void main(String[] args) { SysRun sys = new SysRun(); sys.sysRun(); }
public void sysRun() { System.out.println( "启动系统管理系统" ); boolean isExit = false ; do { System.out.println( "----------操作选项-------------" ); SysMenu.showMenu(SysMenu.MENU); // 获取用户输入 int operNum = getCorrONum(SysMenu.MENU); // 管理操作 isExit = doManageNum(operNum); } while (!isExit); System.out.println( "系统退出." ); }
private boolean doManageNum( int operNum) { boolean isExit = false ; switch (operNum) { case 1 : is.showPerson(); System.out.println( "----------操作选项-------------" ); SysMenu.showMenu(SysMenu.OPERATION_MENU); // addPerson();//test System.out.println( "输入功能选择：" ); int num = getVaildInt(); doOperationNum(num); break ; case 2 : isExit = true ; return isExit; } return isExit; }
// doOperationNum private void doOperationNum( int OperationNum) { // 增，查，修，删，返回 switch (OperationNum) { case 1 : // add addPerson(); is.showPerson(); break ; case 2 : // 查看 viewPerson(); break ; case 3 : updatePerson(); break ; case 4 : deletePerson(); is.showPerson(); break ; case 5 : break ; } }
// 删除Person private void deletePerson() { int num; // Person p; boolean isOk = false ; System.out.println( "请输入要删除信息的编号：" ); do { num = getVaildInt(); isOk = is.CheckExitByNum(num); if (isOk == true ) { System.out.println( "编号信息查找成功。" ); informationList.remove(is.getPersonByNum(num)); } else System.out.println( "输入编号有误，请重新输入：" ); } while (!isOk);
}
// 修改Person public void updatePerson() { System.out.println( "请输入要修改的信息编号：" ); boolean isOk = false ; Person p; do { int num = getVaildInt(); isOk = is.CheckExitByNum(num); if (isOk == true ) { isOk = true ; p = is.getPersonByNum(num); is.showAPerson(p);
System.out.println( "请输入名字：" ); String name = s.next(); System.out.println( "请输入性别：" ); String sex = getVaildSex(); System.out.println( "请输入工资：" ); int salary = getVaildInt();
p.setName(name); p.setSex(sex); p.setSalary(salary); is.showPerson(); } else System.out.println( "输入要修改的编号有误，请重新输入：" ); } while (!isOk);
}
// 查看viewPerson() private void viewPerson() { System.out.println( "请输入要查看的人的信息编号：" ); Person p; boolean isOk = false ; do { int num = getVaildInt(); boolean NumIsOk = is.CheckExitByNum(num); if (NumIsOk == true ) { p = is.getPersonByNum(num); is.showAPerson(p); isOk = true ; } else { System.out.println( "无此编号的人的信息,请重新输入：" ); } } while (!isOk);
}
// addPerson() private void addPerson() { System.out.println( "------------新增对象---------------" );
boolean isOk = false ; String name = null ; do { System.out.println( "请输入名称(且不能与现有的对象重名)" ); name = s.next(); // 处理同名冲突 if (is.getPersonByName(name) == null ) { isOk = true ; } else { System.out.println( "该人信息已存在，请重新输入！" ); s.next(); } } while (!isOk); // other information System.out.println( "请输入其他信息..." ); System.out.println( "sex:" ); String sex = getVaildSex(); System.out.println( "salary:" ); int salary = getVaildInt(); // save is.savePerson( new Person( 0 , name, sex, salary)); }
/* 输入有效int */ private int getVaildInt() { int num = 0 ; boolean isOk = false ; do { try { num = s.nextInt(); isOk = true ; } catch (InputMismatchException e) { System.out.println( "输入错误，请重新输入" ); s.next(); } } while (!isOk); return num; }
/* 输入有效sex信息 */ private String getVaildSex() { String sex = null ; boolean isOk = false ; do { sex = s.next(); if (sex.equals( "f" ) || sex.equals( "m" )) isOk = true ; else { System.out.println( "sex输入让 有误，请重新输入" ); } } while (!isOk); return sex; }
public int getCorrONum(String[] targetMenu) { System.out.println( "请输入要选择的操作：" );
int inputNum = 0 ; boolean inputIsOk = false ; do { try { inputNum = s.nextInt(); System.out.println( "输入的是" + inputNum); if (inputNum >= 1 && inputNum <= targetMenu.length) { inputIsOk = true ; } else { System.out.println( "输入错误，请重新输入！" ); } } catch (InputMismatchException e) { System.out.println( "输入有误，请重新输入" ); // 若输入出现异常，Scanner要丢弃上一次的输入，否则 do-while会出现死循环 s.next(); }
} while (!inputIsOk); return inputNum; }
} |
效果图：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
原文链接：https://blog.csdn.net/u014453898/article/details/79007883