在Java中,为了确保Vo类(Value Object)的数据封装性,可以采取以下几种方法:
public class UserVO {
private String username;
private String password;
// getter and setter methods
}
public class UserVO {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
// validation or other operations
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
// validation or other operations
this.password = password;
}
}
public final class UserVO {
private final String username;
private final String password;
public UserVO(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
}
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class UserVO {
@NotNull
@Size(min = 4, max = 20)
private String username;
@NotNull
@Size(min = 6, max = 20)
private String password;
// getter and setter methods
}
通过以上方法,我们可以在Java中确保Vo类的数据封装性。