java实现客户管理系统

本文实例为大家分享了java实现客户管理系统的具体代码，供大家参考，具体内容如下

代码:

先写个客户类

package jjave_16;

/**
* 客户类
*
*/
public class Customer {

 private String name;
 private char gender;
 private int age;
 private String phone;
 private String email;

 public Customer(String name, char gender, int age, String phone, String email) {
  this.name = name;
  this.gender = gender;
  this.age = age;
  this.phone = phone;
  this.email = email;
 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public char getGender() {
  return gender;
 }

 public void setGender(char gender) {
  this.gender = gender;
 }

 public int getAge() {
  return age;
 }

 public void setAge(int age) {
  this.age = age;
 }

 public String getPhone() {
  return phone;
 }

 public void setPhone(String phone) {
  this.phone = phone;
 }

 public String getEmail() {
  return email;
 }

 public void setEmail(String email) {
  this.email = email;
 }

 public String toString() {
  return "Customer [name=" + name + ", gender=" + gender + ", age=" + age + ", phone=" + phone + ", email=" + email + "]";
 }
 
 

}

之后就写两个工具类和运行类

package jjave_16;
/**
* 工具类:操作字符长度输入是否正确
*
*/
import java.util.Scanner;
public class CMUtility {
 /**
  * 用于界面菜单的选择,该方法读取键盘,如果用户输入1-5中的任意字符,则方法返回,返回值为用户键入字符
  */
 private static Scanner scan=new Scanner(System.in);//少了static，下面的方面无法使用
 
 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.println("选择错误,请重新输入:");
   }else break;
  }
  return c;
 }
 /**
  *
  * @param
  * @param blankReturn
  * @return
  */
 public static String readKeyBoard(int limit, boolean blankReturn) {
  String line=" ";
  

  for(;;) {
   line=scan.nextLine();
   if(line.length()==0) {
    if(blankReturn)
     return line;
   }
   if(line.length()<1||line.length()>limit) {
    System.out.println("输入长度(在大于)" + limit + ")错误,请重新输入:");
    //continue;
   }else break;
   
  }
  return line;
 }
 /**
  * 功能5: 退出判断
  */
 public static char readConfirmSelection() {
  char c;
  for(;;) {
  String str=readKeyBoard(1,false).toUpperCase();
  c=str.charAt(0);
  if(c!='Y'&&c!='N') {
   System.out.println("选择错误,请重新输入:");
  }else break;
  }
  return c;
 }


 /**
  * 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 i) {
  
  return readKeyBoard(i,false);
 }
 
 /**
  * 从键盘读取一个字符,并将其作为方法的返回值
  */
 public static char readChar() {
  char c;

  for (;;) {
   String str = readKeyBoard(1, false);
   c = str.charAt(0);
   if (c == '男' || c == '女') {
    break;
   } else {
    System.out.println("输入错误(只能选择男或女),请重新输入:");
   }
  }
  return c;
 }
 /**
  * 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 (Exception e) {
    System.out.println("数字输入错误,请重新输入:");
   }
  }
  return n;
 }
}

package jjave_16;

/**
* 工具类:操作存储客户的数组增删改查
*
*/
public class CustomerList {
 private Customer[] customers;
 private int total=0;
 
 public CustomerList(int index){
  customers=new Customer[index]; 
 }

 /**
  * 查询所有客户
  * 因为需要借助total的值，来确定是数组中的第几个！！
  */
 public Customer[] getAllCustomers() {
  Customer[] custs = new Customer[total];
  for(int i=0;i<total;i++) {
   custs[i] = customers[i];
  }
  return custs;
   
 }
 public Customer getCustomer(int limit) {
  if(limit>0||limit<total) {
   return customers[limit];
  }else return null;
 }


public boolean addCustomer(Customer cust) {
/**
*  for(int i=0;i<index;i++) {
*  customers[i]=cust;
* }
* 初步想出的方法，可惜实现很麻烦。。。
*/
 if(total>customers.length)return false;
 
 customers[total++]=cust;
 return true;
 }

/**
* 根据编号删除客户
*/
public boolean deleteCustomer(int index) {
 if(index<0 || index>=total) return false;
 /**
  * for里面的条件值得一想。
  */
 for(int i=index;i<total-1;i++) {
  customers[i]=customers[i+1];
 }
 customers[--total]=null;
 
 return true;
}

public boolean replaceCustomer(int index,Customer cust) {
 if(index<0 || index>=total) return false;
 
 
 customers[index]=cust;
 
 
 return true;
 
}


}

package com.up;

/**
* 业务类
*
*/
public class CustomerView {

 public static void main(String[] args) {
  CustomerView cView = new CustomerView();
  cView.enterMainMenu();

 }

 private CustomerList customers = new CustomerList(10);

 public CustomerView() {
  Customer cust = new Customer("张三", '男', 28, "010-56253825", "abc@email.com");
  customers.addCustomer(cust);
 }

 public void enterMainMenu() {
  boolean loopFlag = true;

  do {
   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("           请选择(1-5):");

   char key = CMUtility.readMenuSelection();
   switch (key) {
   case '1':
    addNewCustomer();
    break;
   case '2':
    modifyCustomer();
    break;
   case '3':
    deleteCustomer();
    break;
   case '4':
    listAllCustomer();
    break;
   case '5':
    System.out.println("确认是否退出(Y/N):");
    char yn = CMUtility.readConfirmSelection();
    if (yn == 'Y') {
     loopFlag = false;
    }
    break;
   }
  } while (loopFlag);
 }

 private void addNewCustomer() {
  System.out.println("------------------------添加客户----------------------");
  System.out.println("姓名:");
  String name = CMUtility.readString(4);
  System.out.println("性别:");
  char gender = CMUtility.readChar();
  System.out.println("年龄");
  int age = CMUtility.readInt();
  System.out.println("电话:");
  String phone = CMUtility.readString(15);
  System.out.println("邮箱:");
  String email = CMUtility.readString(15);

  Customer cust = new Customer(name, gender, age, phone, email);
  boolean flag = customers.addCustomer(cust);
  if (flag) {
   System.out.println("------------------------添加完成----------------------");
  } else {
   System.out.println("---------------------记录已满,无法添加----------------------");
  }
 }

 private void modifyCustomer() {
  System.out.println("------------------------修改客户----------------------");

  int index = 0;
  Customer cust = null;
  for (;;) {

   System.out.println("请选择待修改客户编号(-1退出):");
   index = CMUtility.readInt();
   if (index == -1) {
    return;
   }
   
   cust = customers.getCustomer(index - 1);
   if(cust == null){
    System.out.println("无法找到指定客户!");
   }else
    break;
  }
  
  System.out.println("姓名("+cust.getName()+"):");
  String name = CMUtility.readString(4,cust.getName());
  System.out.println("性别("+cust.getGender()+"):");
  char gender = CMUtility.readChar();
  System.out.println("年龄("+cust.getAge()+"):");
  int age = CMUtility.readInt();
  System.out.println("电话("+cust.getPhone()+"):");
  String phone = CMUtility.readString(15,cust.getPhone());
  System.out.println("邮箱("+cust.getEmail()+"):");
  String email = CMUtility.readString(15,cust.getEmail());
  
  cust = new Customer(name,gender,age,phone,email);
  
  boolean flag = customers.replaceCustomer(index -1,cust);
  if(flag){
   System.out.println("------------------------修改完成----------------------");
  }else{
   System.out.println("------------------无法找到指定客户,修改失败------------------");
  }
  
 }

 private void deleteCustomer() {
  System.out.println("------------------------删除客户----------------------");

  int index = 0;
  Customer cust = null;

  for (;;) {
   System.out.println("请选择待删除客户编号(-1退出):");
   index = CMUtility.readInt();
   if (index == -1) {
    return;
   }

   cust = customers.getCustomer(index - 1);
   if (cust == null) {
    System.out.println("无法找到指定客户!");
   } else
    break;
  }

  System.out.println("确认是否删除(Y/N):");
  char yn = CMUtility.readConfirmSelection();
  if (yn == 'N')
   return;

  boolean flag = customers.deleteCustomer(index - 1);
  if (flag) {
   System.out.println("------------------------删除完成----------------------");
  } else {
   System.out.println("------------------无法找到指定客户,删除失败------------------");
  }
 }

 private void listAllCustomer() {
  System.out.println("------------------------客户列表----------------------");
  Customer[] custs = customers.getAllCustomers();
  if (custs.length == 0) {
   System.out.println("没有客户记录!");
  } else {
   System.out.println("编号\t姓名\t性别\t年龄\t电话\t\t邮箱");
   for (int i = 0; i < custs.length; i++) {
    System.out.println(i + 1 + "\t" + custs[i].getName() + "\t" + custs[i].getGender() + "\t" + custs[i].getAge() + "\t" + custs[i].getPhone() + "\t" + custs[i].getEmail());
   }
  }
 }

}

暂时先用数组实现客户的保存，当然里面使用到了高内聚低耦合的设计概念。

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源码搜藏网。