Question

我在我的应用程序中实现搜索功能，我在那里搜索数据库中的记录。我正在使用ElasticSearch，我知道我必须保持数据库和索引同步。我将在应用层上处理这个问题。

我的问题更多的是从我的J2EE 7应用程序查询ElasticSearch。我可以从查询中获取JsonObject或JsonArray，并且＆＃34;手动解析＆＃34;它使用Gson lib及其JsonObject和JsonArray类，但这很难产生。

根据我的阅读，使用GSON解析的最佳做法是使POJO具有与Json对象相同的结构。我可以这样做，但是这个POJO与我的JPA实体非常相似，所以我在两个地方都有相同的信息，这会使维护变得更难。我无法让它无缝地工作，但我想尝试另一种方法。

所以我的问题是，是否可以将json对象映射到JPA实体，更重要的是，这是一个很好的做法吗？

这是我的JSON（变量名称可以更改，我知道他们现在不匹配）：

        {
           "vendorEcommerce": 1,
           "Categories": {
              "Sub": [
                 4,
                 8,
                 5
              ],
              "Main": [
                 1,
                 2
              ]
           },
           "Countries": 1,
           "vendorFeatured": 1,
           "vendorWebsite": "www.johndoesserviceprovider.com",
           "vendorEmail": "johndoe@gmail.com",
           "vendorCreated": "2015-02-25T17:00:13.000Z",
           "vendorName": "John Doe's Service Provider",
           "vendorLocation": 1,
           "vendorRating": 1,
           "States": [
              1,
              2
           ],
           "vendorUpdated": "2015-02-25T17:00:13.000Z",
           "vendorPhone": "+11235551234",
           "vendorDescription": "This is John Doe's Service Provider Description",
           "vendorPromotion": "Oh yeah",
           "vendorPrice": 3
        }

这是我的JPA实体（不相关的信息）：

public class VendorEntity implements Serializable {
    private static final long serialVersionUID = 1L;

    private Integer vendorId;
    private Date vendorCreated;
    private Date vendorUpdated;
    private String vendorName;
    private String vendorWebsite;
    private String vendorPhone;
    private String vendorEmail;
    private String vendorDescription;
    private Boolean vendorEcommerce;
    private Integer vendorRating;
    private Integer vendorPrice;
    private String vendorPromotion;
    private Boolean vendorFeatured;
    private LocationEntity location;
    private List<ServiceCategoryEntity> categories;
    private List<VendorCoverageEntity> coverages;
}

Answer 1

您可以使用Spring Data Elasticsearch与JPA一起使用..

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(excludeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = ElasticsearchCrudRepository.class))
@EnableElasticsearchRepositories(includeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = ElasticsearchCrudRepository.class))
public class DataConfiguration {
    ...
}

实体示例：

@Entity
@Table(name="learn_author")
@Document(indexName = "blogging", type = "author", shards = 1, replicas = 0)
public class Author implements Serializable {

    @org.springframework.data.annotation.Id
    @Id
    @GeneratedValue(strategy= GenerationType.SEQUENCE)
    @Column(name="id")
    private Long id;

    @Column(name="username")
    private String username;

    @Field(type = FieldType.String,
        searchAnalyzer = "standard",
        indexAnalyzer = "standard",
        store = true)
    @Column(name="fullname")
    private String fullname;

    ...

}

完整示例

click here

使用JEST将ElasticSearch结果映射到JPA实体

1 个答案: