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When doing the paging function, the front-end paging plug-in generally needs some data such as the current number of pages, the total number of pages, the total number of pages, and so on. At this time, you can reference PageInfo, which can fully meet the paging requirements of the plug-in.

@ GetMapping ("/ findAll") public PageInfo findAll (@ RequestParam (defaultValue = "1") Integer pageNum, @ RequestParam (defaultValue = "20") Integer pageSize) {PageHelper.startPage (pageNum, pageSize); List countries = countryMapper.findAll (); / / Page page = (Page) countries;// System.out.println ("number of entries per page:" + page.getPageSize ()); / / System.out.println ("Total number:" + page.getTotal ()) / / System.out.println ("current Page:" + page.getPageNum ()); / / System.out.println ("Total pages:" + page.getPages ()); PageInfo result = new PageInfo (countries); return result;}

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Looking at the source code of the PageInfo class, it is not difficult to find that it has comprehensive support for the properties of the front-end paging plug-in.

Private int pageNum; / / current page number private int pageSize; / / how many pieces of data displayed per page private int size; / / Total number of data items private int startRow; private int endRow; private int pages; / / how many pages in total private int prePage; / / previous page private int nextPage; / / next page private boolean isFirstPage; private boolean isLastPage; private boolean hasPreviousPage; private boolean hasNextPage; private int navigatePages; private int [] navigatepageNums This is the end of private int navigateFirstPage; private int navigateLastPage; 's introduction to "how to integrate pagehelper in Springboot2". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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