先来看看运行结果：
该程序可实现基本的成员创建以及基础的增、删、改、查的操作。
下面附上详细代码：
custmer 类：
package bean;
public class custmer {
private String name;
private String email;
private String phonenum;
private int age;
private char sex;
//定义构造器
public custmer() {
}
public custmer(String name, String email, String phonenum, int age, char sex) {
super();
this.name = name;
this.email = email;
this.phonenum = phonenum;
this.age = age;
this.sex = sex;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhonenum() {
return phonenum;
}
public void setPhonenum(String phonenum) {
this.phonenum = phonenum;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public char getSex() {
return sex;
}
public void setSex(char sex) {
this.sex = sex;
}
}custmerList 类：
public class custmerList {
private custmer[] custmer;
private int total = 0;
//构造器
public custmerList(int totalcustmer) {
custmer = new custmer[totalcustmer];
}
//添加操作
public boolean addcustmer(custmer custmers) {
if(total >= custmer.length) {
return false;
}else {
custmer[total] = custmers;
total++;
return true;
}
}
//修改操作
public boolean replacecustomer(int index,custmer cust) {
if(index < 0 || index >=total) {
return false;
}else {
custmer[index] = cust;
return true;
}
}
//删除操作
public boolean deletecustomer(int index) {
if(index < 0 || index >= total) {
return false;
}else {
for(int i=index;i<total;i++) {
custmer[i] = custmer[i+1];
}
custmer[total-1] = null;
total--;
return true;
}
}
//返回全部的成员数组
public custmer[] getA11customers() {
custmer[] custs = new custmer[total];
for(int i = 0; i < total;i++) {
custs[i]=custmer[i];
}
return custs;
}
//返回特定的成员
public custmer getcustomer(int index) {
if(index >= total && index < 0) {
return null;
}
return custmer[index];
}
//返回成员数目
public int getTotal() {
return total;
}
}custmerViewer 类（主函数入口）：
import java.util.*;
public class custmerViewer {
private custmerList custlist = new custmerList(10);
private Scanner sc = new Scanner(System.in);
public void entermainMeue() {
boolean isflag = true;
while(isflag) {
System.out.println("---------------------------------客户信息管理软件-------------------------");
System.out.println(" 1.添加客户 ");
System.out.println(" 2.修改客户 ");
System.out.println(" 3.删除客户 ");
System.out.println(" 4.客户列表 ");
System.out.println(" 5.退出 ");
System.out.println("--------------------------------------------------------------------------");
System.out.print("请选择：");
CMUtility cmu = new CMUtility();
char menu = cmu.readMenuSelection();
switch(menu) {
case '1':
addNewCustomer();
break;
case '2':
modifyCustomer();
break;
case '3':
deleteCustomer();
break;
case '4':
listAIlCustomers();
break;
case '5':
isflag = false;
System.out.println("退出成功！");
break;
}
}
}
private void addNewCustomer() {
System.out.println("--------------------------------------------------------------------------");
if(custlist.getTotal()<10) {
System.out.print("名字：");
String name =CMUtility.readString(8);
System.out.print("邮箱：");
String email = CMUtility.readString(20);
System.out.print("电话：");
String phonenum = CMUtility.readString(11);
System.out.print("年龄：");
int age = CMUtility.readInt();
System.out.print("性别：");
char sex = CMUtility.readChar();
custmer cust = new custmer(name,email,phonenum,age,sex);
custlist.addcustmer(cust);
System.out.println("新成员创建成功！");
}else {
System.out.println("成员已满，无法创建！");
}
System.out.println("--------------------------------------------------------------------------");
}
private void modifyCustomer() {
System.out.println("--------------------------------------------------------------------------");
if(custlist.getTotal()==0) {
System.out.println("成员列表里面未存在成员！");
}else {
System.out.print("请输入待修改的成员的编号：");
int num = CMUtility.readInt();
if(num>=1 && num <=custlist.getTotal() ) {
custmer cus = custlist.getcustomer(num-1);
System.out.print("姓名"+"("+cus.getName()+"):");
String name =CMUtility.readString(8,cus.getName());
cus.setName(name);
System.out.print("邮箱"+"("+cus.getEmail()+"):");
String email = CMUtility.readString(20,cus.getEmail());
cus.setEmail(email);
System.out.print("电话"+"("+cus.getPhonenum()+"):");
String phonenum = CMUtility.readString(11,cus.getPhonenum());
cus.setPhonenum(phonenum);
System.out.print("年龄"+"("+cus.getAge()+"):");
int age = CMUtility.readInt(cus.getAge());
cus.setAge(age);
System.out.print("性别"+"("+cus.getSex()+"):");
char sex = CMUtility.readChar(cus.getSex());
cus.setSex(sex);
System.out.println("信息修改成功！");
}else {
System.out.println("错误编号！");
modifyCustomer();
}
}
System.out.println("--------------------------------------------------------------------------");
}
private void deleteCustomer() {
System.out.println("--------------------------------------------------------------------------");
System.out.print("输入想删除的成员编号：");
int num = sc.nextInt();
System.out.print("确定想要删除该成员？ Y/N :");
char a = CMUtility.readConfirmSelection();
if(a == 'Y') {
custlist.deletecustomer(num-1);
}
System.out.println("--------------------------------------------------------------------------");
}
private void listAIlCustomers() {
if(custlist.getTotal()!=0) {
custmer[] custmers = custlist.getA11customers();
System.out.println("------------------------------成员列表---------------------------------");
System.out.println("编号\t姓名\t邮箱\t\t\t电话\t\t年龄\t性别");
for(int i=0;i< custlist.getTotal();i++) {
System.out.println((i+1)+"\t"+custlist.getcustomer(i).getName()+"\t"+custlist.getcustomer(i).getEmail()+"\t"+custlist.getcustomer(i).getPhonenum()+"\t"+custlist.getcustomer(i).getAge()+"\t"+custlist.getcustomer(i).getSex());
}
}else {
System.out.println("成员列表里面未存在成员！");
}
System.out.println("-----------------------------------------------------------------------");
}
public static void main(String[] args) {
custmerViewer view = new custmerViewer();
view.entermainMeue();
}
}CMUtility 工具类（可以自行在网站搜索得到）：
import java.util.*;
public class CMUtility {
private static Scanner scanner = new Scanner(System.in);
/**
用于界面菜单的选择。该方法读取键盘，如果用户键入’1’-’5’中的任意字符，则方法返回。返回值为用户键入字符。
*/
public static char readMenuSelection() {
char c;
for (; ; ) {
String str = readKeyBoard(1, false);
c = str.charAt(0);
if (c != '1' && c != '2' &&
c != '3' && c != '4' && c != '5') {
System.out.print("选择错误，请重新输入：");
} else break;
}
return c;
}
/**
从键盘读取一个字符，并将其作为方法的返回值。
*/
public static char readChar() {
String str = readKeyBoard(1, false);
return str.charAt(0);
}
/**
从键盘读取一个字符，并将其作为方法的返回值。
如果用户不输入字符而直接回车，方法将以defaultValue 作为返回值。
*/
public static char readChar(char defaultValue) {
String str = readKeyBoard(1, true);
return (str.length() == 0) ? defaultValue : str.charAt(0);
}
/**
从键盘读取一个长度不超过2位的整数，并将其作为方法的返回值。
*/
public static int readInt() {
int n;
for (; ; ) {
String str = readKeyBoard(2, false);
try {
n = Integer.parseInt(str);
break;
} catch (NumberFormatException e) {
System.out.print("数字输入错误，请重新输入：");
}
}
return n;
}
/**
从键盘读取一个长度不超过2位的整数，并将其作为方法的返回值。
如果用户不输入字符而直接回车，方法将以defaultValue 作为返回值。
*/
public static int readInt(int defaultValue) {
int n;
for (; ; ) {
String str = readKeyBoard(2, true);
if (str.equals("")) {
return defaultValue;
}
try {
n = Integer.parseInt(str);
break;
} catch (NumberFormatException e) {
System.out.print("数字输入错误，请重新输入：");
}
}
return n;
}
/**
从键盘读取一个长度不超过limit的字符串，并将其作为方法的返回值。
*/
public static String readString(int limit) {
return readKeyBoard(limit, false);
}
/**
从键盘读取一个长度不超过limit的字符串，并将其作为方法的返回值。
如果用户不输入字符而直接回车，方法将以defaultValue 作为返回值。
*/
public static String readString(int limit, String defaultValue) {
String str = readKeyBoard(limit, true);
return str.equals("")? defaultValue : str;
}
/**
用于确认选择的输入。该方法从键盘读取‘Y’或’N’，并将其作为方法的返回值。
*/
public static char readConfirmSelection() {
char c;
for (; ; ) {
String str = readKeyBoard(1, false).toUpperCase();
c = str.charAt(0);
if (c == 'Y' || c == 'N') {
break;
} else {
System.out.print("选择错误，请重新输入：");
}
}
return c;
}
private static String readKeyBoard(int limit, boolean blankReturn) {
String line = "";
while (scanner.hasNextLine()) {
line = scanner.nextLine();
if (line.length() == 0) {
if (blankReturn) return line;
else continue;
}
if (line.length() < 1 || line.length() > limit) {
System.out.print("输入长度（不大于" + limit + "）错误，请重新输入：");
continue;
}
break;
}
return line;
}
}本人小白一名，有问题欢迎大家提出，一起讨论！
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