用双向链表作数据结构，用java语言编写一个通讯录管理系统，本系统应完成一下几方面的功能： 1)输入信息——enter(); 2)显示信息———display( ); 3)查找以姓名作为关键字 ———search( ); 4)删除信息———delete( ); 5)存盘———save ( ); 6)装入———load( ) ; 设计要求： 1)每条信息至包含 ：姓名（NAME ）街道（STREET）城市（CITY）邮编（EIP）国家（STATE）几项 2)作为一个完整的系统，应具有友好的界面和较强的容错能力，上机能正常运行 3）具有可视化窗口界面

好的，我明白了你的问题。以下是一个用双向链表作数据结构，用 Java 语言编写的通讯录管理系统的基本框架。你可以在此基础上进行扩展和完善。

import java.io.*;
import java.util.*;

class Node {
    String name;
    String street;
    String city;
    String zip;
    String state;
    Node prev;
    Node next;

    public Node(String name, String street, String city, String zip, String state) {
        this.name = name;
        this.street = street;
        this.city = city;
        this.zip = zip;
        this.state = state;
        this.prev = null;
        this.next = null;
    }
}

public class AddressBook {
    Node head;
    Node tail;

    public AddressBook() {
        this.head = null;
        this.tail = null;
    }

    public void enter(String name, String street, String city, String zip, String state) {
        Node newNode = new Node(name, street, city, zip, state);
        if (head == null) {
            head = newNode;
            tail = newNode;
        } else {
            tail.next = newNode;
            newNode.prev = tail;
            tail = newNode;
        }
        System.out.println("New entry added.");
    }

    public void display() {
        Node current = head;
        while (current != null) {
            System.out.println("Name: " + current.name);
            System.out.println("Street: " + current.street);
            System.out.println("City: " + current.city);
            System.out.println("Zip: " + current.zip);
            System.out.println("State: " + current.state);
            current = current.next;
        }
    }

    public void search(String name) {
        Node current = head;
        while (current != null) {
            if (current.name.equalsIgnoreCase(name)) {
                System.out.println("Name: " + current.name);
                System.out.println("Street: " + current.street);
                System.out.println("City: " + current.city);
                System.out.println("Zip: " + current.zip);
                System.out.println("State: " + current.state);
                return;
            }
            current = current.next;
        }
        System.out.println("Entry not found.");
    }

    public void delete(String name) {
        Node current = head;
        while (current != null) {
            if (current.name.equalsIgnoreCase(name)) {
                if (current == head) {
                    head = current.next;
                    if (head != null) {
                        head.prev = null;
                    } else {
                        tail = null;
                    }
                } else if (current == tail) {
                    tail = current.prev;
                    tail.next = null;
                } else {
                    current.prev.next = current.next;
                    current.next.prev = current.prev;
                }
                System.out.println("Entry deleted.");
                return;
            }
            current = current.next;
        }
        System.out.println("Entry not found.");
    }

    public void save(String filename) {
        try {
            FileWriter fw = new FileWriter(filename);
            Node current = head;
            while (current != null) {
                fw.write(current.name + "," + current.street + "," + current.city + "," + current.zip + "," + current.state + "\n");
                current = current.next;
            }
            fw.close();
            System.out.println("Data saved.");
        } catch (IOException e) {
            System.out.println("Error saving data.");
        }
    }

    public void load(String filename) {
        try {
            FileReader fr = new FileReader(filename);
            BufferedReader br = new BufferedReader(fr);
            String line;
            while ((line = br.readLine()) != null) {
                String[] fields = line.split(",");
                String name = fields[0];
                String street = fields[1];
                String city = fields[2];
                String zip = fields[3];
                String state = fields[4];
                enter(name, street, city, zip, state);
            }
            br.close();
            System.out.println("Data loaded.");
        } catch (IOException e) {
            System.out.println("Error loading data.");
        }
    }

    public static void main(String[] args) {
        AddressBook book = new AddressBook();
        Scanner input = new Scanner(System.in);
        while (true) {
            System.out.println("1. Enter new data");
            System.out.println("2. Display all data");
            System.out.println("3. Search for data");
            System.out.println("4. Delete data");
            System.out.println("5. Save data");
            System.out.println("6. Load data");
            System.out.println("7. Exit");
            System.out.print("Enter your choice: ");
            int choice = input.nextInt();
            input.nextLine(); // consume newline character
            switch (choice) {
                case 1:
                    System.out.print("Enter name: ");
                    String name = input.nextLine();
                    System.out.print("Enter street: ");
                    String street = input.nextLine();
                    System.out.print("Enter city: ");
                    String city = input.nextLine();
                    System.out.print("Enter zip: ");
                    String zip = input.nextLine();
                    System.out.print("Enter state: ");
                    String state = input.nextLine();
                    book.enter(name, street, city, zip, state);
                    break;
                case 2:
                    book.display();
                    break;
                case 3:
                    System.out.print("Enter name: ");
                    name = input.nextLine();
                    book.search(name);
                    break;
                case 4:
                    System.out.print("Enter name: ");
                    name = input.nextLine();
                    book.delete(name);
                    break;
                case 5:
                    System.out.print("Enter filename: ");
                    String filename = input.nextLine();
                    book.save(filename);
                    break;
                case 6:
                    System.out.print("Enter filename: ");
                    filename = input.nextLine();
                    book.load(filename);
                    break;
                case 7:
                    System.exit(0);
                default:
                    System.out.println("Invalid choice.");
            }
        }
    }
}

这个程序中，`Node` 类表示双向链表中的一个节点，包含了通讯录中的信息以及指向前一个节点和后一个节点的指针。`AddressBook` 类表示整个通讯录，包含了双向链表的头节点和尾节点，以及各种操作方法（如添加、删除、查找、显示等）。在 `main` 方法中，使用一个无限循环来不断等待用户输入操作，根据用户的选择调用相应的方法。