new TypeReference<Page<StoryResponse>>() {}
该语句的问题在于，Jackson无法实例化抽象类型。你应该为Jackson提供有关如何实例化Page具体类型的信息。但是它的具体类型，PageImpl没有默认构造函数或与此相关的任何@JsonCreator，因此你也不能使用以下代码：@H_404_11@
new TypeReference<PageImpl<StoryResponse>>() {}
由于无法将所需的信息添加到Page类中，因此最好为Page接口创建一个自定义实现，该接口具有默认的无参数构造函数，如本答案所示。然后在类型引用中使用该自定义实现，如下所示：@H_404_11@
new TypeReference<CustomPageImpl<StoryResponse>>() {}
public class CustomPageImpl<T> extends PageImpl<T> {
private static final long serialVersionUID = 1L;
private int number;
private int size;
private int totalPages;
private int numberOfElements;
private long totalElements;
private boolean prevIoUsPage;
private boolean firstPage;
private boolean nextPage;
private boolean lastPage;
private List<T> content;
private Sort sort;
public CustomPageImpl() {
super(new ArrayList<>());
}
@Override
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
@Override
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
@Override
public int getTotalPages() {
return totalPages;
}
public void setTotalPages(int totalPages) {
this.totalPages = totalPages;
}
@Override
public int getNumberOfElements() {
return numberOfElements;
}
public void setNumberOfElements(int numberOfElements) {
this.numberOfElements = numberOfElements;
}
@Override
public long getTotalElements() {
return totalElements;
}
public void setTotalElements(long totalElements) {
this.totalElements = totalElements;
}
public boolean isPrevIoUsPage() {
return prevIoUsPage;
}
public void setPrevIoUsPage(boolean prevIoUsPage) {
this.prevIoUsPage = prevIoUsPage;
}
public boolean isFirstPage() {
return firstPage;
}
public void setFirstPage(boolean firstPage) {
this.firstPage = firstPage;
}
public boolean isNextPage() {
return nextPage;
}
public void setNextPage(boolean nextPage) {
this.nextPage = nextPage;
}
public boolean isLastPage() {
return lastPage;
}
public void setLastPage(boolean lastPage) {
this.lastPage = lastPage;
}
@Override
public List<T> getContent() {
return content;
}
public void setContent(List<T> content) {
this.content = content;
}
@Override
public Sort getSort() {
return sort;
}
public void setSort(Sort sort) {
this.sort = sort;
}
public Page<T> pageImpl() {
return new PageImpl<>(getContent(), new PageRequest(getNumber(),
getSize(), getSort()), getTotalElements());
}
}
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