Question

我正在使用SPring提供的JPA依赖项来列出User表中的所有项目。一些用户在数据库中有电话号码，我的错误率低于此值。有没有办法忽略DB的空值？

java.lang.IllegalArgumentException: Can not set long field com.freelancer.Entity.User.phone to null value
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) ~[na:1.8.0_161]
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) ~[na:1.8.0_161]
    at sun.reflect.UnsafeLongFieldAccessorImpl.set(UnsafeLongFieldAccessorImpl.java:80) ~[na:1.8.0_161]
    at java.lang.reflect.Field.set(Field.java:764) ~[na:1.8.0_161]
    at org.hibernate.property.access.spi.SetterFieldImpl.set(SetterFieldImpl.java:41) ~[hibernate-core-5.2.16.Final.jar:5.2.16.Final]

实体类如下：

@Table(name = "user")
@EntityListeners(AuditingEntityListener.class)
@JsonIgnoreProperties(value = {"createdAt"},
        allowGetters = true)
public class User implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    @NotBlank
    private String name;

    @NotBlank
    private String email;

    @NotBlank
    private String password;


    private long phone;
    private String about;
    private int profile_id;
    private String skills;

Answer 1

long等原始类型不能包含空值。建议您将phone类型更改为Long。此外，当您访问时，您可以进行空检查。

Spring引导句柄数据库的空值

1 个答案: