jpa 2.1中的@ConstructorResult映射

Question

我试图将JPA本机查询的返回结果映射到未映射的Java POJO类，并使用@constructorresult，如下所示：

@SqlResultSetMapping(name = "productDetailResult", classes = {
   @ConstructorResult(targetClass = com.rjil.mhood.jiostore.bo.ProductDetailBO.class,
   columns = {
@ColumnResult(name = "iconId", type = Integer.class),
@ColumnResult(name = "thumbnailId", type = Integer.class),
@ColumnResult(name = "screenshotId1", type = Integer.class),
@ColumnResult(name = "screenshotId2", type = Integer.class),
@ColumnResult(name = "screenshotId3", type = Integer.class),
@ColumnResult(name = "screenshotId4", type = Integer.class),
@ColumnResult(name = "screenshotId5", type = Integer.class),
@ColumnResult(name = "name", type = String.class),
@ColumnResult(name = "description", type = String.class),
@ColumnResult(name = "downloadcount", type = BigDecimal.class),
@ColumnResult(name = "artifactSize", type = String.class),
@ColumnResult(name = "creationDate", type = Date.class),
@ColumnResult(name = "updatedDate", type = Date.class),
@ColumnResult(name = "price", type = BigDecimal.class),
@ColumnResult(name = "downloadUrl", type = String.class),
@ColumnResult(name = "contentProviderName", type = String.class) }) })

public class ProductDetailBO {

    private Integer iconId;
    private Integer thumbnailId;
    private Integer screenshotId1;
    private Integer screenshotId2;
    private Integer screenshotId3;
    private Integer screenshotId4;
    private Integer screenshotId5;
    private String name;
    private String description;
    private BigDecimal downloadCount;
    private String artifactSize;
    private Date creationDate;
    private Date updatedDate;
    private BigDecimal price;
    private String downloadUrl;
    private String contentProviderName;

    public ProductDetailBO() {

    }

    public ProductDetailBO(Integer iconId, Integer thumbnailId,
            Integer screenshotId1, Integer screenshotId2,
            Integer screenshotId3, Integer screenshotId4,
            Integer screenshotId5, String name, String description,
            BigDecimal downloadCount, String artifactSize, Date creationDate,
            Date updatedDate, BigDecimal price, String downloadUrl,
            String contentProviderName) {
        this.iconId = iconId;
        this.thumbnailId = thumbnailId;
        this.screenshotId1 = screenshotId1;
        this.screenshotId2 = screenshotId2;
        this.screenshotId3 = screenshotId3;
        this.screenshotId4 = screenshotId4;
        this.screenshotId5 = screenshotId5;
        this.name = name;
        this.price = price;
        this.creationDate = creationDate;
        this.updatedDate = updatedDate;
        this.description = description;
        this.downloadCount = downloadCount;
        this.artifactSize = artifactSize;
        this.downloadUrl = downloadUrl;
        this.contentProviderName = contentProviderName;

    }


}

ProductDetailBO bo = query.getResultList("query","ProductDetailBO").get(0);

我怎么能那么做？

Answer 1

在我的项目中，我只是对一个未加映射的pojo执行了类似的映射。问题是，在创建查询时，您应该指向SqlResultSetMapping的名称，因此在您的示例中应该如下所示：

final Query query = entityManager.createNativeQuery(queryString, "productDetailResult");

然后类似于：

final List<ProductDetailBO> result = Collections.checkedList(query.getResultList(), ProductDetailBO.class);