Spring Data REST 分页答案

【问题标题】：Spring Data REST paginationSpring Data REST 分页
【发布时间】：2018-05-28 11:36:55
【问题描述】：

从 Spring Boot 1.4 迁移到 2.0 时，一切都很顺利，直到我测试了分页功能。简而言之，我有一个 Web MVC @RestController，其方法返回 Page<MyDTO>。最初，响应将非常简单地以 JSON 序列化：

{
  "content": {},
  "last": true,
  "totalElements": 18,
  "totalPages": 1,
  "sort": [
    {
      "direction": "ASC",
      "property": "id",
      "ignoreCase": false,
      "nullHandling": "NATIVE",
      "ascending": true
    }
  ],
  "numberOfElements": 18,
  "first": true,
  "size": 50,
  "number": 0
}

但迁移后，我得到类似的东西：

{
  "content": {},
  "pageable": {
    "sort": {
      "sorted": false,
      "unsorted": true
    },
    "offset": 0,
    "pageNumber": 0,
    "pageSize": 20,
    "unpaged": false,
    "paged": true
  },
  "totalPages": 1,
  "totalElements": 1,
  "last": true,
  "size": 20,
  "number": 0,
  "sort": {
    "sorted": false,
    "unsorted": true
  },
  "first": true,
  "numberOfElements": 1
}

我不介意，除了反序列化不起作用，即使在尝试调整 MappingJackson2HttpMessageConverter 并设置一些抽象类型解析器之后。

Spring 的官方文档并没有很详细地说明如何进行，如果使用Repositories 和@RestResource 似乎可以完美处理。但是，在通过 MVC 控制器公开 API 时，处理分页的正确和首选方式是什么？

编辑添加堆栈跟踪和更多上下文

在现有代码上运行我的RestTemplates 客户端将导致以下堆栈跟踪。虽然这不是很重要，但我可以通过实现自定义 Pageable 子类（以及 Sort）并配置 MessageConverter 来使用它们来解决它。根本问题是应该如何使用最新的 Spring Boot 堆栈在 JSON 中序列化/反序列化 Page 实例？

ERROR b.o.c.a.handler.CrisExceptionHandler - Type definition error: [simple type, class org.springframework.data.domain.Pageable]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.Pageable` (no Creators, like default construct, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
 at [Source: (PushbackInputStream); line: 1, column: 4802] (through reference chain: be.ondd.cris.service.integration.util.RestResponsePage["pageable"]) 
org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.springframework.data.domain.Pageable]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.Pageable` (no Creators, like default construct, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
 at [Source: (PushbackInputStream); line: 1, column: 4802] (through reference chain: be.ondd.cris.service.integration.util.RestResponsePage["pageable"])
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:238)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:223)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:100)
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:991)
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:974)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:725)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:680)
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:629)
    at be.ondd.cris.service.integration.InformationProviderCRISService.searchInformationProvider(InformationProviderCRISService.java:85)
    at be.ondd.cris.service.integration.InformationProviderCRISService$$FastClassBySpringCGLIB$$adc25943.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
    at be.ondd.cris.api.aspect.LoggingHandler.logAround(LoggingHandler.java:44)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
    at be.ondd.cris.service.integration.InformationProviderCRISService$$EnhancerBySpringCGLIB$$51eda584.searchInformationProvider(<generated>)
    at be.ondd.cris.service.ProductMapperService.mapPageProductToPageProductJson(ProductMapperService.java:126)
    at be.ondd.cris.service.ProductMapperService$$FastClassBySpringCGLIB$$4257f2af.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
    at be.ondd.cris.api.aspect.LoggingHandler.logAround(LoggingHandler.java:44)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
    at be.ondd.cris.service.ProductMapperService$$EnhancerBySpringCGLIB$$4f13b548.mapPageProductToPageProductJson(<generated>)
    at be.ondd.cris.controller.ProductController.findByParameters(ProductController.java:112)
    at be.ondd.cris.controller.ProductController$$FastClassBySpringCGLIB$$7aca546a.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
    at be.ondd.cris.api.aspect.LoggingHandler.logAround(LoggingHandler.java:44)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
    at be.ondd.cris.api.aspect.AuditBusinessActivityHandler.logAround(AuditBusinessActivityHandler.java:98)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
    at be.ondd.cris.controller.ProductController$$EnhancerBySpringCGLIB$$c7d33074.findByParameters(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158)
    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126)
    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:84)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at be.ondd.cris.api.http.CorrelationFilter.doFilter(CorrelationFilter.java:36)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:209)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.Pageable` (no Creators, like default construct, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information
 at [Source: (PushbackInputStream); line: 1, column: 4802] (through reference chain: be.ondd.cris.service.integration.util.RestResponsePage["pageable"])
    at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67)
    at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1451)
    at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1027)
    at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserialize(AbstractDeserializer.java:265)
    at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:136)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4001)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3072)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:235)
    ... 149 common frames omitted

【问题讨论】：

什么不起作用？我们有任何异常跟踪吗？
使用 REST 模板使用服务将导致 Cannot construct instance of org.springframework.data.domain.Pageable。 Page、Pageable 和 Sort 类似乎对 JSON 不太友好。
请在您的问题中发布完整的堆栈跟踪。
问题已编辑。请记住，我确实绕过了异常。我的问题是关于使用 Spring Data 和 Spring MVC 处理分页的首选和标准方法。

标签： spring spring-data spring-data-rest spring-rest

【解决方案1】：

我最终将 Jackson 模块添加到我的应用程序上下文中：

@Bean
public SimpleModule pageJsonModule(Mapper mapper) {
    return new PageJsonModule(mapper);
}

/**
 * Simple Jackson module registering a serializer for the {@link Page} from spring data.
 * Can be dropped if the controllers all return something else than this not JSON friendly type (e.g. HAL response)
 * @see RestResponsePage
 */
private static class PageJsonModule extends SimpleModule {

    final Mapper mapper;

    PageJsonModule(Mapper mapper) {
        super("spring.data.page.module");
        this.mapper = mapper;

        this.addSerializer(new JsonSerializer<Page>() {
            /**
             * will copy fields from the {@link Page} to the JSON friendly POJO {@link RestResponsePage}
             * @param value a {@link Page} of any type
             * @param gen see parent
             * @param serializers see parent
             * @throws IOException see parent
             */
            @Override
            public void serialize(Page value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
                RestResponsePage page = new RestResponsePage();

                // manually copy fields as dozer mapper doesn't seem to handle Page right
                page.getContent().addAll(value.getContent());
                page.setLast(value.isLast());
                page.setTotalElements(value.getTotalElements());
                page.setTotalPages(value.getTotalPages());
                page.setNumber(value.getNumber());
                page.setNumberOfElements(value.getNumberOfElements());
                page.setSize(value.getSize());
                page.setFirst(value.isFirst());
                page.setSort(mapper.map(value.getSort(), RestResponsePage.Sort.class));

                // serialize using default behavior
                serializers.defaultSerializeValue(page, gen);
            }

            @Override
            public Class<Page> handledType() {
                return Page.class;
            }
        });
    }
}

然后读取响应只是映射到RestResonsePage，这是一个简单的 POJO：

/**
 * Originally this POJO was extending {@link org.springframework.data.domain.PageImpl}.
 * As of Spring Data release train Kay, {@link org.springframework.data.domain.PageImpl} was not deserializing correctly with Jackson.
 * <br><br>
 * This should be replaced by a more generic Page Resource or some more standard paging mechanism
 *
 * @param <T> type of the elements from the content list
 */
public class RestResponsePage<T> implements Serializable {

    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 3248189030448292002L;

    public static class Sort {

        private String direction = "ASC";
        private String nullHandling = "NATIVE";
        private boolean ascending = true;
        private String property;
        private boolean ignoreCase;

        public String getDirection() {
            return direction;
        }

        public void setDirection(String direction) {
            this.direction = direction;
        }

        public String getProperty() {
            return property;
        }

        public void setProperty(String property) {
            this.property = property;
        }

        public String getNullHandling() {
            return nullHandling;
        }

        public void setNullHandling(String nullHandling) {
            this.nullHandling = nullHandling;
        }

        public boolean isIgnoreCase() {
            return ignoreCase;
        }

        public void setIgnoreCase(boolean ignoreCase) {
            this.ignoreCase = ignoreCase;
        }

        public boolean isAscending() {
            return ascending;
        }

        public void setAscending(boolean ascending) {
            this.ascending = ascending;
        }
    }

    private List<T> content = new ArrayList<>();
    private boolean last, first;
    private int totalPages, numberOfElements, size, number;
    private long totalElements;
    private Sort sort;

    public List<T> getContent() {
        return content;
    }

    public void setContent(List<T> content) {
        this.content = content;
    }

    public boolean isLast() {
        return last;
    }

    public void setLast(boolean last) {
        this.last = last;
    }

    public boolean isFirst() {
        return first;
    }

    public void setFirst(boolean first) {
        this.first = first;
    }

    public long getTotalElements() {
        return totalElements;
    }

    public void setTotalElements(long totalElements) {
        this.totalElements = totalElements;
    }

    public int getTotalPages() {
        return totalPages;
    }

    public void setTotalPages(int totalPages) {
        this.totalPages = totalPages;
    }

    public int getNumberOfElements() {
        return numberOfElements;
    }

    public void setNumberOfElements(int numberOfElements) {
        this.numberOfElements = numberOfElements;
    }

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    public Sort getSort() {
        return sort;
    }

    public void setSort(Sort sort) {
        this.sort = sort;
    }
}

【讨论】：

【解决方案2】：

对我有用的是映射到自定义 PageResponse，类似于 Rwanou 的回答。

@JsonIgnoreProperties(ignoreUnknown = true)
public class PageResponse<T> {
    private List<T> content;
    private int totalPages;
    private int totalElements;
    private int size;
    private int number;
    private int numberOfElements;
    private boolean first;
    private boolean last;
    private CustomPageable pageable;

    //getters & setters

    public Page<T> pageImpl() {
        return new PageImpl<>(getContent(), getPageable(), getTotalElements());
    }
}

主要问题似乎是解析器难以解析Pageable 接口。但是，使用实现 AbstractPageRequest 或 PageRequest 也不起作用，因为两者都没有默认构造函数。为此我将PageResponse.pageable的类型改为CustomPageable，这只是PageRequest的包装：

@JsonIgnoreProperties(ignoreUnknown = true)
public class CustomPageable extends PageRequest {
    public CustomPageable() {
        super(0, Constants.PAGE_SIZE);
    }
}

有了这两个类，不需要进一步的 Jackson 配置。

【讨论】：