如何使用spring-data-rest

时间：2016-10-13 12:26:31

标签： spring jackson spring-data-rest spring-hateoas

我使用spring-data-rest来公开REST API。我的一个搜索方法返回实体列表。存储库和休息响应如下

List<Order> findByKeywordContaining(String keyword);

搜索回复： 

{  
   "_embedded":{  
      "orders":[  
         {  
            "keyword":"Iron mattress",
            "name":"Hostel",
            "_links":{  
               "self":{  
                  "href":"http://localhost:8081/orders/2"
               },
               "order":{  
                  "href":"http://localhost:8081/orders/2"
               }
            }
         },
         {  
            "keyword":"Iron",
            "name":"Weat strong",
            "_links":{  
               "self":{  
                  "href":"http://localhost:8081/orders/40"
               },
               "order":{  
                  "href":"http://localhost:8081/orders/40"
               }
            }
         }
      ]
   },
   "_links":{  
      "self":{  
         "href":"http://localhost:8081/orders/search/findByKeywordContaining?keyword=iron"
      }
   }
}

现在我使用RestTemplate将此响应用于客户端进程，如下所示

List<Order> orders = restOperations.exchange(new URI(url), HttpMethod.GET, null, new ParameterizedTypeReference<Resource<List<Order>>>() {}).getBody().getContent();

上面的代码适用于响应中的单个对象，但是如果响应包含多个对象。该代码抛出以下错误

org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unrecognized field "_embedded" (class org.springframework.hateoas.Resource), not marked as ignorable (3 known properties: , "links", "content", "page"])
at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@6a2bc870; line: 2, column: 18] (through reference chain: org.springframework.hateoas.Resource["_embedded"]); nested exception is com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "_embedded" (class org.springframework.hateoas.Resource), not marked as ignorable (3 known properties: , "links", "content", "page"])

我在这里缺少什么？如何将上述响应作为List使用？

Order.java 

public class Order {
private int id;
private String name;
private String keyword;
private Agent agent;

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getKeyword() {
    return keyword;
}

public void setKeyword(String keyword) {
    this.keyword = keyword;
}

public Agent getAgent() {
    return agent;
}

public void setAgent(Agent agent) {
    this.agent = agent;
}

完整错误堆栈 

21:39:30.746 [http-bio-8080-exec-36] DEBUG c.o.x.o.accessor.XWorkMethodAccessor - Error calling method through OGNL: object: [com.ams.order.actions.ViewOrderSearchAction@5218c8df] method: [viewOrderSearch] args: [[]]
org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unrecognized field "_embedded" (class org.springframework.hateoas.Resource), not marked as ignorable (2 known properties: , "links", "content"])
 at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@7583f177; line: 2, column: 18] (through reference chain: org.springframework.hateoas.Resource["_embedded"]); nested exception is com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "_embedded" (class org.springframework.hateoas.Resource), not marked as ignorable (2 known properties: , "links", "content"])
 at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@7583f177; line: 2, column: 18] (through reference chain: org.springframework.hateoas.Resource["_embedded"])
    at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readJavaType(MappingJackson2HttpMessageConverter.java:181) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.read(MappingJackson2HttpMessageConverter.java:173) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:94) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:724) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:709) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:527) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:482) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:455) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at com.ams.service.OrderSearcherImpl.searchForName(OrderSearcherImpl.java:49) ~[classes/:na]
    at com.ams.order.actions.ViewOrderSearchAction.viewOrderSearch(ViewOrderSearchAction.java:61) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
    at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:891) [ognl-3.0.6.jar:na]
    at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293) [ognl-3.0.6.jar:na]
    at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68) ~[ognl-3.0.6.jar:na]
    at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108) [xwork-core-2.3.20.jar:2.3.20]
    at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369) [ognl-3.0.6.jar:na]
    at ognl.ASTMethod.getValueBody(ASTMethod.java:90) [ognl-3.0.6.jar:na]
    at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) [ognl-3.0.6.jar:na]
    at ognl.SimpleNode.getValue(SimpleNode.java:258) [ognl-3.0.6.jar:na]
    at ognl.Ognl.getValue(Ognl.java:494) [ognl-3.0.6.jar:na]
    at ognl.Ognl.getValue(Ognl.java:458) [ognl-3.0.6.jar:na]
    at com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76) [struts2-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253) [struts2-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) [struts2-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73) [struts2-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125) [struts2-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91) [struts2-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244) [xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54) [struts2-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564) [struts2-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81) [struts2-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99) [struts2-core-2.3.20.jar:2.3.20]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.67]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.67]
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:186) [spring-security-web-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) [spring-security-web-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343) [spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260) [spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.67]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.67]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.67]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.67]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.67]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.67]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) [catalina.jar:7.0.67]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) [catalina.jar:7.0.67]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.67]
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) [catalina.jar:7.0.67]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.67]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423) [catalina.jar:7.0.67]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079) [tomcat-coyote.jar:7.0.67]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625) [tomcat-coyote.jar:7.0.67]
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318) [tomcat-coyote.jar:7.0.67]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.67]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "_embedded" (class org.springframework.hateoas.Resource), not marked as ignorable (2 known properties: , "links", "content"])
 at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@7583f177; line: 2, column: 18] (through reference chain: org.springframework.hateoas.Resource["_embedded"])
    at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:79) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:555) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:708) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1160) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:315) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:121) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2888) ~[jackson-databind-2.2.2.jar:2.2.2]
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2094) ~[jackson-databind-2.2.2.jar:2.2.2]
    at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readJavaType(MappingJackson2HttpMessageConverter.java:178) ~[spring-web-3.2.17.RELEASE.jar:3.2.17.RELEASE]
    ... 105 common frames omitted

5 个答案:

答案 0 :(得分：2)

您应该能够进行完全相同的restTemplate.exchange()调用，但是对于实体集合使用org.springframework.hateoas.Resources包装器类而不是单个实体的org.springframework.hateoas.Resource包装器类。即new ParameterizedTypeReference<Resources<Order>>() {}作为第4个参数。

请注意，如果您获得此调用返回的包装空集合但未记录任何错误，请确保您拥有org.springframework.data:spring-data-rest-core依赖项 - 我自己和其他开发人员刚刚度过今天大部分都在调试这个！

（这有助于：http://www.java-allandsundry.com/2014/01/consuming-spring-hateoas-rest-service.html）

答案 1 :(得分：1)

问题是您的Order类没有根据响应映射所有字段，因此如果您不想要所有字段，请在Order类中使用Jackson的注释忽略它们 - 

    @JsonIgnoreProperties(ignoreUnknown = true)
    public class Order {
    ...
    }

编辑：创建你的响应类如下（你可以根据你的json响应编辑它） - 

class Response{
    @JsonProperty("_embedded")
    private Embedded embedded;

    public Embedded getEmbedded() {
        return embedded;
    }

    public void setEmbedded(Embedded embedded) {
        this.embedded = embedded;
    }
}


class Embedded{
    @JsonProperty("orders")
    List<Order> orders = new ArrayList<Order>();

    public Embedded(){

    }

    public List<Order> getOrders() {
        return orders;
    }

    public void setOrders(List<Order> orders) {
        this.orders = orders;
    }
}


class Order {
    private int id;
    private String name;
    private String keyword;
    private Agent agent;

    @Override
    public String toString() {
        return "Order [id=" + id + ", name=" + name + ", keyword=" + keyword + "]";
    }

    public Order(){

    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getKeyword() {
        return keyword;
    }

    public void setKeyword(String keyword) {
        this.keyword = keyword;
    }


    public Agent getAgent() {
        return agent;
    }

    public void setAgent(Agent agent) {
        this.agent = agent;
    }

}

由于响应包含在根音注释_embedded中，因此必须考虑并使用@JsonProperty进行注释，以便可以识别

获取如下的响应对象 - 

Response reeponse = restOperations
                .exchange(new URI(url), HttpMethod.GET, null, new ParameterizedTypeReference<Response>() {
                }).getBody().getContent();

答案 2 :(得分：0)

我通过使用spring-hateoas Traverson而不是RestTempalte解决了这个问题。这符合我的预期。

答案 3 :(得分：0)

让杰克逊去世from sqlalchemy import Column, ForeignKey from sqlalchemy.dialects.mysql import LONGTEXT, YEAR from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() class Shows(db.Model): __tablename__ = "shows" id = Column(db.Integer, ForeignKey("programmation.id"), primary_key=True) date = Column(db.DATETIME) title = Column(db.VARCHAR(50)) short_description = Column(db.VARCHAR(200)) type = Column(db.VARCHAR(20)) background_image = Column(db.VARCHAR(150)) content = Column(LONGTEXT) def serialize(self, whatTo): result = {} if 'id' in whatTo: result['id'] = self.id if 'date' in whatTo: result['date'] = str(self.date) if 'title' in whatTo: result['title'] = self.title if 'short_description' in whatTo: result['short_description'] = self.short_description if 'type' in whatTo: result['type'] = self.type if 'background_image' in whatTo: result['background_image'] = self.background_image if 'content' in whatTo: result['content'] = self.content return result class Programmation(db.Model): __tablename__ = "programmation" id = Column(db.Integer, primary_key=True) semester = Column(db.Integer) year = Column(YEAR) 。这将捕获集合的链接以及每个订单的链接。

答案 4 :(得分：0)

在当前版本的 Spring Data 中，您显示的响应类型由 org.springframework.hateoas.CollectionModel 建模。

因此将响应类型更改为 CollectionModel<Order>，并使用 .getContent() 检索 Collection 项（而不是列表）。

Collection<Order> orders = restOperations.exchange(new URI(url), HttpMethod.GET, null, new CollectionModel<Order>() {}).getBody().getContent();
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