0

我有以下休息控制器方法：

@GetMapping
public Page<CompanyDto> findAllCompanies(@RequestParam(value = "name", required = false) String name, Pageable pageable, JwtAuthenticationToken jwtAuthenticationToken) {
...

和 Feigh 客户：

@GetMapping
RestPageImpl<CompanyDto> findAllCompanies(@RequestParam(value = "name", required = false) String name, Pageable pageable, @RequestHeader("Authorization") String token);

到目前为止一切正常。

现在，我想用单个 DTO 对象替换名称和可分页参数：

public class CompanyRequest {

    private CompanyDto company;

    Pageable pageable;

    public CompanyRequest() {
    }

    public CompanyRequest(CompanyDto company, Pageable pageable) {
        this.company = company;
        this.pageable = pageable;
    }

    public CompanyDto getCompany() {
        return company;
    }

    public Pageable getPageable() {
        return pageable;
    }
    
}

像这样：

控制器：

@GetMapping
public Page<CompanyDto> findAllCompanies(CompanyRequest companyRequest, JwtAuthenticationToken jwtAuthenticationToken) {
...

假装客户端：

@GetMapping
RestPageImpl<CompanyDto> findAllCompanies(CompanyRequest companyRequest, @RequestHeader("Authorization") String token);

现在调用以下代码：

companyApiClient.findAllCompanies(new CompanyRequest(new CompanyDto("Company1 name", null), PageRequest.of(0, 10)), accessToken);

失败，但有以下异常：

Caused by: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot construct instance of `com.decisionwanted.api.model.dto.page.RestPageImpl`, problem: Page size must not be less than one!; nested exception is com.fasterxml.jackson.databind.exc.ValueInstantiationException: Cannot construct instance of `com.decisionwanted.api.model.dto.page.RestPageImpl`, problem: Page size must not be less than one!
 at [Source: (PushbackInputStream); line: 1, column: 1499]
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:389)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:342)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:105)
    ... 42 more
Caused by: com.fasterxml.jackson.databind.exc.ValueInstantiationException: Cannot construct instance of `com.decisionwanted.api.model.dto.page.RestPageImpl`, problem: Page size must not be less than one!
 at [Source: (PushbackInputStream); line: 1, column: 1499]
    at com.fasterxml.jackson.databind.exc.ValueInstantiationException.from(ValueInstantiationException.java:47)
    at com.fasterxml.jackson.databind.DeserializationContext.instantiationException(DeserializationContext.java:1754)
    at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.wrapAsJsonMappingException(StdValueInstantiator.java:491)
    at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.rewrapCtorProblem(StdValueInstantiator.java:514)
    at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromObjectWith(StdValueInstantiator.java:285)
    at com.fasterxml.jackson.databind.deser.ValueInstantiator.createFromObjectWith(ValueInstantiator.java:229)
    at com.fasterxml.jackson.databind.deser.impl.PropertyBasedCreator.build(PropertyBasedCreator.java:202)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:490)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1310)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:331)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:164)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4482)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3487)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:378)
    ... 44 more
Caused by: java.lang.IllegalArgumentException: Page size must not be less than one!
    at org.springframework.data.domain.AbstractPageRequest.<init>(AbstractPageRequest.java:48)
    at org.springframework.data.domain.PageRequest.<init>(PageRequest.java:45)
    at org.springframework.data.domain.PageRequest.of(PageRequest.java:72)
    at org.springframework.data.domain.PageRequest.of(PageRequest.java:60)
    at com.decisionwanted.api.model.dto.page.RestPageImpl.<init>(RestPageImpl.java:27)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
    at com.fasterxml.jackson.databind.introspect.AnnotatedConstructor.call(AnnotatedConstructor.java:124)
    at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromObjectWith(StdValueInstantiator.java:283)
    ... 53 more

我做错了什么以及如何解决？

更新

这是 RestPageImpl：

public class RestPageImpl<T> extends PageImpl<T> {

    @JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
    public RestPageImpl(@JsonProperty("content") List<T> content,
                        @JsonProperty("number") int number,
                        @JsonProperty("size") int size,
                        @JsonProperty("totalElements") Long totalElements,
                        @JsonProperty("pageable") JsonNode pageable,
                        @JsonProperty("last") boolean last,
                        @JsonProperty("totalPages") int totalPages,
                        @JsonProperty("sort") JsonNode sort,
                        @JsonProperty("first") boolean first,
                        @JsonProperty("numberOfElements") int numberOfElements) {

        super(content, PageRequest.of(number, size), totalElements);
    }

    public RestPageImpl(List<T> content, Pageable pageable, long total) {
        super(content, pageable, total);
    }

    public RestPageImpl(List<T> content) {
        super(content);
    }

    public RestPageImpl() {
        super(new ArrayList<>());
    }

}
4

0 回答 0