1、完整代码: 1. 用户类(class person): package 用户管理系统; public class Person { private int num; private String name; private String address; private String sex; public Person(){} public Person(int num,String name,String address,String sex){ this.num=num; this.name=name; t
2、his.address=address; this.sex=sex; } public void setNum(int num){ this.num=num; } public int getNum(){ return num; } public void setName(String name){ this.name=name; } public String getName(){ return name; } public void setAddress(String add
3、ress){ this.address=address; } public String getAddress(){ return address; } public void setSex(String sex){ this.sex=sex; } public String getSex(){ return sex; } public String toString() { return "\t"+num+"\t"+name+"\t"+address+"\t"+sex; } }
4、 2. 菜单类(class Menu): package 用户管理系统; import java.util.Scanner; public class Menu { Scanner input=new Scanner(System.in); public Menu() {} public int showMenu() { System.out.println("***********************************"); System.out.println("用户管理系统"); System.out.println("=============
5、"); System.out.println("【1】增加"); System.out.println("【2】删除"); System.out.println("【3】修改"); System.out.println("【4】查询"); System.out.println("【5】浏览"); System.out.println("【6】退出"); System.out.println("***********************************"); System.out.print("请选择操作:
6、"); return input.nextInt(); } public int subMenu() { System.out.println("\t【查询用户】"); System.out.println("\t[1]按用户编号查询"); System.out.println("\t[2]按用户姓名查询"); System.out.println("\t[3]按地址查询"); System.out.println("\t[4]退出"); System.out.println("\t请选择查询编号"); return input.nextInt();
7、 } } 3. 实际操作类(class FileOperate ): package 用户管理系统; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import
8、java.util.Scanner; public class FileOperate { private static String INFO="D:/info.dat"; File file = new File(INFO); Scanner input=new Scanner(System.in); public FileOperate() { if (!file.exists()) { try { file.createNewFile(); }catch(IOException e) { e.printStackTrace();
9、}
}
}
public List
10、teger.parseInt(arr[0]);
String name =arr[1];
String address=arr[2];
String sex=arr[3];
Person person =new Person(num,name,address,sex);
list.add(person);
}
br.close();
return list;
}
private void savelist(List
11、w PrintWriter(new File(INFO));
for (Person c:list) {
pw.format("%d\t %s\t %s\t %s\t \r\n",c.getNum(),c.getName(),c.getAddress(),c.getSex());
}
pw.close();
}
public int getper(int num) throws NumberFormatException,IOException{
List
12、0;i 13、);
int index=getper(num);
if (index!=-1) {
System.out.println("此编号已存在!");}
else{
System.out.println("请输入姓名:");
String name=input.next();
System.out.println("请输入地址:");
String address=input.next();
System.out.println("请输入性别:");
String sex=input. 14、next();
Person person=new Person(num,name,address,sex);
List 15、println("请输入要删除编号:");
int num=input.nextInt();
List 16、确定删除(Y/N)?");
String answer=input.next();
if("Y".equalsIgnoreCase(answer)) {
list.remove(i);
savelist(list);
System.out.println("删除成功!");
}
flag=true;
break;
}
}
if (!flag) {
System.out.p 17、rintln("该用户不存在!");
}
}
//修改
public void update() throws NumberFormatException,IOException{
shoAll();
System.out.println("请输入编号:\n");
int num=input.nextInt();
int Id=getper(num);
if (Id!=-1) {
System.out.println("请输入姓名:");
String name=inp 18、ut.next();
System.out.println("请输入地址:");
String address=input.next();
System.out.println("请输入性别:");
String sex=input.next();
List 19、stem.out.println(per);
savelist(list);
System.out.println("修改成功!");
}else {
System.out.println("编号不存在!");
}
}
//查询
public void search() throws NumberFormatException,IOException{
boolean flag=true;
List 20、)!=0) {
while(flag) {
int slt=new Menu().subMenu();
switch (slt) {
case 1:
System.out.print("\t请输入编号:");
findId(input.nextInt());
break;
case 2:
System.out.print("\t请输入姓名:");
findName(input.next());
break;
case 3:
System.out.prin 21、t("\t请输入地址:");
findAddress(input.next());
break;
case 4:flag=quit();
break;
}
}
}else {
System.out.println("无任何信息!");
}
}
//按编号查询
public void findId(int num) throws NumberFormatException,IOException{
List 22、st=getList();
boolean flag=false;
for (int i=0;i 23、不存在!");
}
}
//按姓名查询
public void findName(String name) throws NumberFormatException,IOException{
List 24、tle();
System.out.println(per);
flag=true;
break;
}
}
if (!flag) {
System.out.println("\t该用户不存在!");
}
}
//按地址查找
public void findAddress(String address) throws NumberFormatException,IOException{
List 25、n>list=getList();
boolean flag=false;
for (int i=0;i 26、 }
if (!flag) {
System.out.println("\t该用户不存在!");
}
}
//退出查询
public boolean quit() {
System.out.println("是否确定退出(Y/N)?");
if ("Y".equalsIgnoreCase(input.next())) {
System.out.println("退出成功!");
return false;
}else {
r 27、eturn true;
}
}
//浏览
public void shoAll() throws NumberFormatException,IOException{
List 28、"无任何信息!");
}
}
public void showTitle() {
System.out.println("用户信息为:\n\t编号\t姓名\t地址\t性别");
}
//退出系统
public boolean exit() {
System.out.println("是否确定退出(Y/N)?");
return!"Y".equalsIgnoreCase(input.next())?true:false;
}
}
4. 测试类(class Text):
pack 29、age 用户管理系统;
import java.io.IOException;
public class Test {
public static void main(String[] args) throws NumberFormatException,
IOException {
Menu m=new Menu();
boolean flag=true;
FileOperate fo=new FileOperate();
while(flag) {
int slt=m.showMenu();
switch(slt) {
30、 case 1:fo.insert();//增加
break;
case 2:fo.delete();//删除
break;
case 3:fo.update();//修改
break;
case 4:fo.search();//查询
break;
case 5:fo.shoAll();//浏览
break;
case 6: //退出
flag=fo.exit();
if(!flag)
System.out.println("谢谢使用!");
break;
}
}
}
}






