如何消费页面 使用Spring RestTemplate的响应

如何消费页面 使用Spring RestTemplate的响应

new TypeReference>() {}

该语句的问题在于，Jackson无法实例化抽象类型。您应该为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

，因此您也
不能 使用以下代码：

new TypeReference<PageImpl<StoryResponse>>() {}

由于您不能将所需的信息添加到

Page

类中，因此最好为

Page

具有默认no-
arg构造函数的接口创建一个自定义实现，如本[答案所示](http://codingdict.com/questions/110311。然后在类型引用中使用该自定义实现，如下所示：

new TypeReference<CustomPageImpl<StoryResponse>>() {}

这是从链接的问题中复制的自定义实现：

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());    }}