PageInfo返回的total不正确，和list的size一样_new pageinfo(list).gettotal()

直接上代码

List<Cyinfor> cyinfors = cyinforService.getAll();
        List<ForeCyinfor>  list=cyinforService.foreFull(cyinfors);
        int total = (int) new PageInfo<>(list).getTotal();

注意 这里数据库返回的结果是  cyinfors这个数组 而不是list这个数组 

修改后

List<Cyinfor> cyinfors = cyinforService.getAll();
        int total = (int) new PageInfo<>(cyinfors).getTotal();
        List<ForeCyinfor>  list=cyinforService.foreFull(cyinfors);

用数据库返回的结果传进PageInfo就好了

来分析下原因

PageInfo源码

 public PageInfo(List<T> list, int navigatePages) {
        super(list);
        this.isFirstPage = false;
        this.isLastPage = false;
        this.hasPreviousPage = false;
        this.hasNextPage = false;
        if (list instanceof Page) {
            Page page = (Page)list;
            this.pageNum = page.getPageNum();
            this.pageSize = page.getPageSize();
            this.pages = page.getPages();
            this.size = page.size();
            if (this.size == 0) {
                this.startRow = 0;
                this.endRow = 0;
            } else {
                this.startRow = page.getStartRow() + 1;
                this.endRow = this.startRow - 1 + this.size;
            }
        } else if (list instanceof Collection) {
            this.pageNum = 1;
            this.pageSize = list.size();
            this.pages = this.pageSize > 0 ? 1 : 0;
            this.size = list.size();
            this.startRow = 0;
            this.endRow = list.size() > 0 ? list.size() - 1 : 0;
        }
 
        if (list instanceof Collection) {
            this.navigatePages = navigatePages;
            this.calcNavigatepageNums();
            this.calcPage();
            this.judgePageBoudary();
        }
 
    }

可以看到这

else if (list instanceof Collection) {
            this.pageNum = 1;
            this.pageSize = list.size();
            this.pages = this.pageSize > 0 ? 1 : 0;
            this.size = list.size();
            this.startRow = 0;
            this.endRow = list.size() > 0 ? list.size() - 1 : 0;
        }

如果这个数组不是page那  返回的结果是不一样的