Java 如何在 Spring Mvc Jpa 中将实体对象列表转换为页面对象？
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时间：2020-08-11 19:03:20 来源:igfitidea点击:
How to convert a List of enity Object to Page Object in Spring Mvc Jpa?
提问by briantaurostack7
I have a Listof entities.
How do I convert it to PageObject using Spring MVC 4 and Spring Data JPA?
我有一个List实体。如何Page使用 Spring MVC 4 和 Spring Data JPA将其转换为Object？
采纳答案by briantaurostack7
There is a Pageimplementationfor that:
有一个Page实现：
final Page<Something> page = new PageImpl<>(theListOfSomething);
回答by Mehraj Malik
There is one more Constructor:
还有一个构造函数：
Page<FOO> page = new PageImpl<>(listOfsomething, pageable, listOfsomething.size());
回答by smndiaye
I think you will need to fetch the correct page content as well.
我认为您还需要获取正确的页面内容。
PageRequest pageRequest = PageRequest.of(offset, limit);
List<Product> products = getProducts();
int total = products.size();
int start = toIntExact(pageRequest.getOffset());
int end = Math.min((start + pageRequest.getPageSize()), total);
List<Product> output = new ArrayList<>();
if (start <= end) {
output = products.subList(start, end);
}
return new PageImpl<>(
output,
pageRequest,
total
);
