• Java-CMS

     

    Utility

    1. package com.atguigu.p2.util;
    2.  
    3. import java.util.*;
    4.  
    5. public class CMUtility {
    6. 	public static void main(String[] args) {
    7. 		//System.out.println(readMenuSelection());
    8. 	}
    9. 	private static Scanner scanner = new Scanner(System.in);
    10. 	private static String readKeyBoard(int limit,boolean blank){
    11. 		for (;;) {
    12. 			String str = scanner.nextLine();
    13. 			if (str.length()>0 && str.length()<=limit) {
    14. 				return str;
    15. 			} else if (blank) {
    16. 				return str;
    17. 			}else{
    18. 				System.out.println("请输入长度不超过"+limit+"的指令");
    19. 			}
    20. 		}
    21. 		
    22. 	}
    23.  
    24. 	public static char readMenuSelection(){
    25. 		//获取功能选择
    26. 		char c;
    27. 		for(;;){
    28. 			String str = readKeyBoard(1,false);
    29. 			c = str.charAt(0);
    30. 			if (c=='1' || c=='2' || c=='3' || c=='4' || c=='5' ) {
    31. 				return c;
    32. 			} else {
    33. 				System.out.println("选择错误，请重新输入。");
    34. 			}
    35. 		}
    36. 	}
    37.  
    38. 	public static char readChar(){
    39. 		//获取性别
    40. 		String str = readKeyBoard(1,false);
    41. 		return str.charAt(0);
    42. 	}
    43. 	
    44. 	public static char readChar(char defaultValue){
    45. 		//修改性别信息时，不输入信息直接回车
    46. 		String str = readKeyBoard(1,true);
    47. 		return (str.length()==0)? defaultValue : str.charAt(0);
    48. 	}
    49. 	
    50. 	public static int readInt(){
    51. 		//获取年龄
    52. 		int n;
    53. 		for(;;){
    54. 			String str = readKeyBoard(2,false);
    55. 			try{
    56. 				n = Integer.parseInt(str);
    57. 				return n;
    58. 			}catch (NumberFormatException e) {
    59. 				System.out.println("数字输入错误，请重新输入。");
    60. 			}
    61. 		}
    62. 	}
    63. 	
    64. 	public static int readInt(int defaultValue){
    65. 		//修改年龄信息时，不输入信息直接回车
    66. 		int n;
    67. 		for(;;){
    68. 			String str = readKeyBoard(2,true);
    69. 			if (str.equals("")) {
    70. 				return defaultValue;
    71. 			}
    72. 			try{
    73. 				n = Integer.parseInt(str);
    74. 				return n;
    75. 			}catch (NumberFormatException e) {
    76. 				System.out.println("数字输入错误，请重新输入。");
    77. 			}
    78. 		}
    79. 	}
    80.  
    81. 	public static String readString(int limit){
    82. 		//姓名、电话、邮箱的输入
    83. 		return readKeyBoard(limit,false);
    84. 	}
    85. 	
    86. 	public static String readString(int limit,String defaultValue){
    87. 		//修改姓名、电话、邮箱时，不输入信息直接回车
    88. 		String str = readKeyBoard(limit,true);
    89. 		return str.equals("") ? defaultValue : str;
    90. 	}
    91. 	
    92. 	public static char readConfirmSelection(){
    93. 		//获取确认的输入
    94. 		for(;;){
    95. 			String str = readKeyBoard(1,false).toUpperCase();
    96. 			char c = str.charAt(0);
    97. 			if (c=='Y' || c=='N') {
    98. 				return c;
    99. 			} else {
    100. 				System.out.println("选择错误，请输入Y/N");
    101. 			}
    102. 		}
    103. 	}
    104. }
    105.

    Customer模块

    1. package com.cms3;
    2.  
    3. public class Customer {
    4. 	private String name;
    5. 	private char gender;
    6. 	private int age;
    7. 	private String tele;
    8. 	private String mail;
    9. 	public Customer() {
    10. 		
    11. 	}
    12. 	public Customer(String name,char gender, int age, String tele, String mail) {
    13. 		this.name = name;
    14. 		this.gender = gender;
    15. 		this.age = age;
    16. 		this.tele = tele;
    17. 		this.mail = mail;
    18. 	}
    19. 	public String getName() {
    20. 		return name;
    21. 	}
    22. 	public void setName(String name) {
    23. 		this.name = name;
    24. 	}
    25. 	public char getGender() {
    26. 		return gender;
    27. 	}
    28. 	public void setGender(char gender) {
    29. 		this.gender = gender;
    30. 	}
    31. 	public int getAge() {
    32. 		return age;
    33. 	}
    34. 	public void setAge(int age) {
    35. 		this.age = age;
    36. 	}
    37. 	public String getTele() {
    38. 		return tele;
    39. 	}
    40. 	public void setTele(String tele) {
    41. 		this.tele = tele;
    42. 	}
    43. 	public String getMail() {
    44. 		return mail;
    45. 	}
    46. 	public void setMail(String mail) {
    47. 		this.mail = mail;
    48. 	}
    49. 	
    50. 	
    51. }

    CustomerList模块

    1. package com.cms3;
    2.  
    3. public class CustomerList {
    4. 	private int total = 0;
    5. 	Customer[] custList;
    6. 	private Customer customer = new Customer("Tom",'m',10,"17717777777","tom@gmail.com");
    7. 	public CustomerList() {
    8. 		
    9. 	}
    10. 	public CustomerList(int total) {
    11. 		custList = new Customer[total];
    12. 		addCustomer(customer);
    13. 	}
    14. 	public boolean addCustomer(Customer customer) {
    15. 		if(total < custList.length) {
    16. 			custList[total ++] = customer;
    17. 			return true;
    18. 		}else {
    19. 			return false;
    20. 		}
    21. 	}
    22. 	
    23. 	public boolean replaceCustomer(int index, Customer customer) {
    24. 		if(index < 0 || index >= total) {
    25. 			return false;
    26. 		}else {
    27. 			custList[index] = customer;
    28. 			return true;
    29. 		}
    30. 	}
    31. 	
    32. 	public boolean deleteCustomer(int index) {
    33. 		if(index < 0 || index >= total) {
    34. 			return false;
    35. 		}else {
    36. 			custList[index] = null;
    37. 			for(int i = index; i < total - 1; i ++) {
    38. 				custList[i] = custList[i + 1]; 
    39. 			}
    40. 			total --;
    41. 			return true;
    42. 		}
    43. 	}
    44. 	public Customer getCustomer(int index) {
    45. 		if(index >= 0 && index < total) {
    46. 			return custList[index];
    47. 		}else {
    48. 			System.out.println("获取失败");
    49. 			return null;
    50. 		}
    51. 	}
    52. 	public Customer[] getAllCustomer() {		
    53. 			return custList;
    54. 	}
    55. 	public int getTotal() {
    56. 		return total;
    57. 	}
    58. 	
    59. }

    CustomerView

    1. package com.cms3;
    2.  
    3. import com.cms3.Customer;
    4. import com.cms3.CustomerList;
    5. import com.atguigu.p2.util.CMUtility;
    6.  
    7. public class CustomerView {
    8. 	private CustomerList custList = new CustomerList(10);
    9. 	public static void main(String[] args) {
    10. 		CustomerView CV = new CustomerView();
    11. 		CV.showMenu();
    12. 		
    13. 	}
    14. 	public void showMenu() {
    15. 		boolean isFlag = true;
    16. 		while(isFlag) {
    17. 			System.out.println("客户关系管理软件");
    18. 			System.out.println("1： 添加客户");
    19. 			System.out.println("2： 修改客户");
    20. 			System.out.println("3： 删除客户");
    21. 			System.out.println("4： 显示客户列表");
    22. 			System.out.println("5： 退出");
    23. 			int choiceMenu = CMUtility.readMenuSelection();
    24. 			switch(choiceMenu) {
    25. 			case '1':
    26. 				addClient();
    27. 				break;
    28. 			case '2':
    29. 				replaceClient();
    30. 				break;
    31. 			case '3':
    32. 				deleteClient();
    33. 				break;
    34. 			case '4':
    35. 				getAllClient();
    36. 				break;
    37. 			case '5':
    38. 				System.out.println("确定要退出吗?(Y/N):");
    39. 				char choiceYN = CMUtility.readConfirmSelection();
    40. 				if(choiceYN == 'Y') {
    41. 					isFlag = false;
    42. 				}
    43. 				break;
    44. 			default:
    45. 				System.out.println("输入错误，请重新输入");
    46. 			}
    47. 		}
    48. 	}
    49. 	public void addClient() {
    50. 		System.out.println("添加客户");
    51. 		System.out.println("姓名：");
    52. 		String name = CMUtility.readString(10);
    53. 		System.out.println("性别");
    54. 		char gender = CMUtility.readChar();
    55. 		System.out.println("年龄");
    56. 		int age = CMUtility.readInt();
    57. 		System.out.println("电话");
    58. 		String tele = CMUtility.readString(11);
    59. 		System.out.println("邮箱");
    60. 		String mail = CMUtility.readString(30);
    61. 		Customer customer = new Customer(name,gender,age,tele,mail);
    62. 		boolean addResult = custList.addCustomer(customer);
    63. 		if(addResult) {
    64. 			System.out.println("添加成功");
    65. 		}else {
    66. 			System.out.println("列表已满，添加失败");
    67. 		}
    68. 		
    69. 	}
    70. 	public void replaceClient() {
    71. 		System.out.println("修改客户");
    72. 		System.out.println("请输入要修改的客户编号(-1退出)");
    73. 		int index = CMUtility.readInt();
    74. 		if(index == -1) {
    75. 			return;
    76. 		}else {
    77. 			Customer customer = custList.getCustomer(index - 1);
    78. 			System.out.println("姓名(" + customer.getName() + "):");
    79. 			String name = CMUtility.readString(10,customer.getName());
    80. 			System.out.println("性别(" + customer.getGender() + "):");
    81. 			char gender = CMUtility.readChar(customer.getGender());
    82. 			System.out.println("年龄(" + customer.getAge() + "):");
    83. 			int age = CMUtility.readInt(customer.getAge());
    84. 			System.out.println("电话(" + customer.getTele() + "):");
    85. 			String tele = CMUtility.readString(11,customer.getTele());
    86. 			System.out.println("邮箱(" + customer.getMail() + "):");
    87. 			String mail = CMUtility.readString(20,customer.getMail());
    88. 			Customer newCustomer = new Customer(name,gender,age,tele, mail);
    89. 			boolean replaceResult = custList.replaceCustomer(index - 1, newCustomer);
    90. 			if(replaceResult) {
    91. 				System.out.println("修改成功");
    92. 			}else {
    93. 				System.out.println("修改失败");
    94. 			}
    95. 		}
    96. 		
    97. 	}
    98. 	public void deleteClient() {
    99. 		System.out.println("删除客户");
    100. 		System.out.println("请输入要删除的客户编号,(-1退出)");
    101. 		int index = CMUtility.readInt();
    102. 		if(index == -1) {
    103. 			return;
    104. 		}else {
    105. 			boolean deleteResult = custList.deleteCustomer(index - 1);
    106. 			if(deleteResult) {
    107. 				System.out.println("删除成功");
    108. 			}else {
    109. 				System.out.println("删除失败");
    110. 			}
    111. 		}
    112. 		
    113. 	}
    114. 	public void getAllClient() {
    115. 		System.out.println("客户列表");
    116. 		int total = custList.getTotal();
    117. 		Customer customer[] = custList.getAllCustomer();
    118. 		System.out.println("编号\t姓名\t性别\t年龄\t电话\t\t邮箱");
    119. 		if(total == 0) {
    120. 			System.out.println("列表为空");
    121. 			return;
    122. 		}else {
    123. 			for(int i = 0; i < total; i ++) {
    124. 				System.out.println("" + (i + 1)
    125. 						 + "\t" +  customer[i].getName()
    126. 						 + "\t" +  customer[i].getGender()
    127. 						 + "\t" +  customer[i].getAge()
    128. 						 + "\t" +  customer[i].getTele()
    129. 						 + "\t" +  customer[i].getMail());
    130. 			}
    131. 		}
    132. 	}
    133. 	
    134. }

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  • 原文地址：https://blog.csdn.net/JSWANGCHANG/article/details/127729965