spring-boot 使用Pageable将查询结果list 转page 分页

1、通过pageable 实现将list 转 page

测试发现  直接 通过 new pageImpl 来转换page 行不通

Page<String> stringPage = new PageImpl<String>(strings, pageable, strings.size());

根据结果可知  未实现分页功能。 

 

则通过手动分割方式去实现 

public static void main(String[] args) {
        List<String> strings = new ArrayList<String>();
        for (int i=0;i<20;i++){
            strings.add("第"+i+"数据");
        }
        Pageable pageRequest = new PageRequest(1, 10);
        Page<String> strings1 = listConvertToPage1(strings, pageRequest);
        System.out.println(strings1);
    }

public static <T> Page<T> listConvertToPage1(List<T> list, Pageable pageable) {
        int start = pageable.getOffset();
        int end = (start + pageable.getPageSize()) > list.size() ? list.size() : (start + pageable.getPageSize());
        return new PageImpl<T>(list.subList(start, end), pageable, list.size());
    }