我似乎无法从 Json 响应中找出嵌套对象。这是我的代码：
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.sun.xml.internal.org.jvnet.fastinfoset.stax.LowLevelFastInfosetStreamWriter;
import io.sphere.sdk.categories.Category;
import io.sphere.sdk.client.HttpRequestIntent;
import io.sphere.sdk.client.JsonNodeSphereRequest;
import io.sphere.sdk.client.SphereRequest;
import io.sphere.sdk.http.HttpMethod;
import io.sphere.sdk.http.HttpResponse;
import io.sphere.sdk.json.SphereJsonUtils;
import io.sphere.sdk.models.Base;
import io.sphere.sdk.models.LocalizedString;
import com.google.gson.Gson;
import javax.annotation.Nullable;
import java.lang.reflect.Type;
import java.time.LocalDateTime;
import java.util.*;
public class EvaProduct {
private String id;
private LocalDateTime createdAt;
private LocalDateTime lastModifiedAt;
private LocalizedString name;
// private LocalizedString description;
// private Set<Category> categories;
// private Set<EvaVariant> veloVariants = new HashSet<>();
@JsonCreator
EvaProduct(@JsonProperty("id") String id,
@JsonProperty("crdAt") LocalDateTime createdAt,
@JsonProperty("lastModifiedAt") LocalDateTime lastModifiedAt,
@JsonProperty("name") LocalizedString name ){
this.id = id;
this.createdAt = createdAt;
this.lastModifiedAt = lastModifiedAt;
this.name = name;
}
public String getId() {
return id;
}
public LocalDateTime getCreatedAt() { return createdAt; }
public LocalDateTime getLastModifiedAt() {
return lastModifiedAt;
}
public LocalizedString getName(){
return name;
}
static SphereRequest<List<EvaProduct>> getAllEvaProducts(){
return new GetAllEvaProducts();
}
@Override
public String toString() {
return "EvaProduct {" +
"id='" + id + '\'' +
", createdAt=" + createdAt +
", lastModifiedAt=" + lastModifiedAt +
", name=" + name +
'}';
}
private static class GetAllEvaProducts extends Base implements SphereRequest<List<EvaProduct>> {
public static final int MAX = 2;
@Nullable
@Override
public List<EvaProduct> deserialize(HttpResponse httpResponse) {
final JsonNode rootJsonNode = SphereJsonUtils.parse(httpResponse.getResponseBody());
final JsonNode results = rootJsonNode.get("data").get("products").get("results");
List<EvaProduct> evaProducts = SphereJsonUtils.readObject(results, new TypeReference<List<EvaProduct>>() { });
return evaProducts;
}
@Override
public HttpRequestIntent httpRequestIntent() {
final String queryString = String.format("query product {\n" +
" products(limit: %d) {\n" +
" results {\n" +
" id\n" +
" createdAt\n" +
" lastModifiedAt\n" +
" masterData{\n" +
" current{\n" +
" name(locale: \"en\")" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
" }", MAX);
final String body =String.format(
"{\n" +
" \"query\": \"%s\"" +
"}", queryString.replace("\n", "\\n").replace("\"", "\\\""));
return HttpRequestIntent.of(HttpMethod.POST, "/graphql", body);
}
}
}
从控制器：
import io.sphere.sdk.client.SphereClient;
import io.sphere.sdk.client.SphereRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ExecutionException;
import static handson.impl.ClientService.createSphereClient;
import static handson.EvaVariant.requestOfSkusEvaProducts;
import static handson.EvaProduct.getAllEvaProducts;
public class ZEvaKnowsGraphQL {
private static final Logger LOG = LoggerFactory.getLogger(ZEvaKnowsGraphQL.class);
public static void main(String[] args) throws IOException, ExecutionException, InterruptedException {
try (final SphereClient client = createSphereClient()) {
SphereRequest<List<EvaProduct>> allEvaProducts = getAllEvaProducts();
CompletionStage<List<EvaProduct>> listCompletionStage = client.execute((allEvaProducts));
List<EvaProduct> evaProducts1 = listCompletionStage.toCompletableFuture().get();
for(EvaProduct evaProduct: evaProducts1) {
System.out.println(evaProduct.toString());
}
}
}
}
我设法从 GraphQL 请求中获得了完整的结果，因此 JsonNode 结果具有所有正确的值。例如，它看起来像这样：
[{"id":"098834e3-e636-4186-91e5-30176ee3c261","createdAt":"2019-12-18T14:38:53.617Z","lastModifiedAt":"2019-12-18T14:38:53.617Z","masterData":{"current":{"name":"cookie-BlueWine"}}},{"id":"238135fb-3fa0-4f54-9e52-d70e5bd38b43","createdAt":"2019-12-18T14:38:53.631Z","lastModifiedAt":"2019-12-21T19:22:33.324Z","masterData":{"current":{"name":"cookie-RedWinerru"}}}]
但是，我似乎无法将嵌套名称值放入我的 Java 对象中。所以 evaProducts 现在看起来像这样：
EvaProduct {id='098834e3-e636-4186-91e5-30176ee3c261', createdAt=2019-12-18T14:38:53.617, lastModifiedAt=2019-12-18T14:38:53.617, name=null} EvaProduct {id='238135fb-3fa0-4f54-9e52-d70e5bd38b43', createdAt=2019-12-18T14:38:53.631, lastModifiedAt=2019-12-21T19:22:33.324, name=null}
所以名称为空。有人可以给我一个关于如何解决这个问题的提示吗？如何将嵌套值放入正确的字段中？