Question

我在JPA

中有一个如下所示的实体对象

@Entity
@Table(name="my_version")
public class MyVersion implements EntityKeyOverride {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "id")
    private Long id;

    @NotNull
    private Long instanceId;

    @NotNull
    private Long documentId;

    @NotNull
    @Size(max = 255)
    private String name;


    @NotNull
    private Integer majorVersion;


    @NotNull
    private Integer minorVersion;

    @Size(max = 255)
    private String classification;

    @Size(max = 1500)
    private String description;

    @Size(max = 1500)
    private String title;

    @Size(max = 255)
    private String lifecycle;


    @NotNull
    @Temporal(TemporalType.TIMESTAMP)
    @DateTimeFormat(style = "LL", iso = ISO.DATE_TIME)
    private Calendar createdDate;

//getter and setter

}

我正试图从hibernate / jpa entitymanager转移到jdbctemplate。我正在尝试将我的实体用作BeanPropertyRowMapper而不是Customrowmapper。

jdbcTemplate.query(SQLQueryDescriptorTest, query.toString(), parameterMap, new BeanPropertyRowMapper(MyVersion.class));

我对此有几点怀疑。

1）如果我使用BeanPropertyRowMapper或CustomRowMapper，注释是否会像@NotNull @Size(max = 255)一样应用？因为我正在离开实体。

2）使用BeanPropertyRowMapper时，我得到以下异常。

caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type [java.sql.Timestamp] to required type [java.util.Calendar] for property 'createdDate'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.sql.Timestamp] to required type [java.util.Calendar] for property 'createdDate': no matching editors or conversion strategy found
        at org.springframework.beans.AbstractNestablePropertyAccessor.convertIfNecessary(AbstractNestablePropertyAccessor.java:591)
        at org.springframework.beans.AbstractNestablePropertyAccessor.convertForProperty(AbstractNestablePropertyAccessor.java:603)
        at org.springframework.beans.AbstractNestablePropertyAccessor.setPropertyValue(AbstractNestablePropertyAccessor.java:449)

Answer 1

将Calendar更改为Date并删除@Temporal和@DateTimeFormat注释。

在spring jdbctemplate中将实体映射到行映射器时出现异常

1 个答案: