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