用java写一个crm

作为AI助手，我可以提供一些指导，但是具体的实现需要您进行更深入的研究和开发。

下面是一个基本的CRM系统的Java代码框架：

public class Customer {
    private String name;
    private String address;
    private String phone;
    private String email;

    // Constructor
    public Customer(String name, String address, String phone, String email) {
        this.name = name;
        this.address = address;
        this.phone = phone;
        this.email = email;
    }

    // Getters and setters
    public String getName() {
        return name;
    }

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

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    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 class CustomerManager {
    private List<Customer> customers;

    // Constructor
    public CustomerManager() {
        customers = new ArrayList<Customer>();
    }

    // Add a customer
    public void addCustomer(Customer customer) {
        customers.add(customer);
    }

    // Remove a customer
    public void removeCustomer(Customer customer) {
        customers.remove(customer);
    }

    // Search for a customer by name
    public List<Customer> searchByName(String name) {
        List<Customer> results = new ArrayList<Customer>();
        for (Customer customer : customers) {
            if (customer.getName().equalsIgnoreCase(name)) {
                results.add(customer);
            }
        }
        return results;
    }

    // Search for a customer by phone number
    public List<Customer> searchByPhone(String phone) {
        List<Customer> results = new ArrayList<Customer>();
        for (Customer customer : customers) {
            if (customer.getPhone().equalsIgnoreCase(phone)) {
                results.add(customer);
            }
        }
        return results;
    }

    // Search for a customer by email
    public List<Customer> searchByEmail(String email) {
        List<Customer> results = new ArrayList<Customer>();
        for (Customer customer : customers) {
            if (customer.getEmail().equalsIgnoreCase(email)) {
                results.add(customer);
            }
        }
        return results;
    }
}

public class CRMSystem {
    private CustomerManager customerManager;

    // Constructor
    public CRMSystem() {
        customerManager = new CustomerManager();
    }

    // Add a customer
    public void addCustomer(String name, String address, String phone, String email) {
        Customer customer = new Customer(name, address, phone, email);
        customerManager.addCustomer(customer);
    }

    // Remove a customer
    public void removeCustomer(String name) {
        List<Customer> customers = customerManager.searchByName(name);
        for (Customer customer : customers) {
            customerManager.removeCustomer(customer);
        }
    }

    // Search for a customer by name
    public List<Customer> searchByName(String name) {
        return customerManager.searchByName(name);
    }

    // Search for a customer by phone number
    public List<Customer> searchByPhone(String phone) {
        return customerManager.searchByPhone(phone);
    }

    // Search for a customer by email
    public List<Customer> searchByEmail(String email) {
        return customerManager.searchByEmail(email);
    }
}

这个代码框架可以实现一些基本的CRM功能，例如添加、删除和搜索客户。但是，它还缺少许多其他功能，如客户分类、报告生成和销售跟踪等。您需要根据实际需要进行修改和扩展。

此外，要构建一个完整的CRM系统，还需要考虑数据库设计、用户界面设计和安全性等方面。这需要更多的技术和经验，建议您在开发过程中寻求专业人士的帮助。