JavaBean完整指南：轻松掌握对象封装与数据管理技巧

public class User {

private String name;
private int age;

public User() {}

public String getName() {
    return name;
}

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

public int getAge() {
    return age;
}

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

}

public class Account {

private String accountNumber;
private double balance;
private boolean active;

public String getAccountNumber() {
    return accountNumber;
}

public void setAccountNumber(String accountNumber) {
    this.accountNumber = accountNumber;
}

public double getBalance() {
    return balance;
}

public void setBalance(double balance) {
    this.balance = balance;
}

public boolean isActive() {
    return active;
}

public void setActive(boolean active) {
    this.active = active;
}

}

public class UserForm {

private String username;
private String password;
private String email;
private String phone;
private Date birthDate;
private String gender;

// 标准的getter和setter
public String getUsername() { return username; }
public void setUsername(String username) { this.username = username; }

public String getPassword() { return password; }
public void setPassword(String password) { this.password = password; }

// 其他getter/setter...

// 业务验证方法
public boolean isValid() {
    return username != null && !username.trim().isEmpty() &&
           email != null && email.contains("@") &&
           password != null && password.length() >= 6;
}

// 数据转换方法
public User toEntity() {
    User user = new User();
    user.setUsername(this.username);
    user.setEmail(this.email);
    user.setPasswordHash(PasswordUtil.hash(this.password));
    user.setCreateTime(new Date());
    return user;
}

}

public class TransactionRecord implements Serializable {

private static final long serialVersionUID = 2023112701L;

private String transactionId;
private String fromAccount;
private String toAccount;
private BigDecimal amount;
private Currency currency;
private TransactionStatus status;
private Date transactionTime;
private transient String sensitiveData; // 不参与序列化

// 构造器和getter/setter...

// 自定义序列化逻辑
private void writeObject(java.io.ObjectOutputStream out) 
    throws IOException {
    out.defaultWriteObject();
    // 序列化前可以做一些清理或加密
    this.sensitiveData = null;
}

private void readObject(java.io.ObjectInputStream in) 
    throws IOException, ClassNotFoundException {
    in.defaultReadObject();
    // 反序列化后的初始化工作
    if (this.transactionTime == null) {
        this.transactionTime = new Date();
    }
}

}