标签:static art 创建 分页显示 lis nal service parameter star
创建实体类
public class PageBean<T> implements Serializable{ /** * */ private static final long serialVersionUID = 1L; private int currentPage; //当前第几页 ,请求传过来 private int pageCount; // 每页显示多少条数据 private int totalCount; //总记录数,查询数据获得 private int totalPage; //总页数, 通过 totalCount 和 pageCount计算获得 private int startIndex; //开始索引,与pageCount 组成 limit 条件 private List<T> pageData; //分页显示的页数,如 1,2,3,4 private int start; private int end; public PageBean(int currentPage,int pageCount,int totalCount){ this.currentPage=currentPage; this.pageCount=pageCount; this.totalCount=totalCount; if(totalCount % pageCount==0){ this.totalPage = totalCount/ pageCount; }else{ this.totalPage= totalCount/pageCount+1; } this.startIndex = (currentPage-1)*pageCount; this.start=1; this.end=5; if(pageCount<=5){ this.end= this.totalPage; }else{ this.start=currentPage-2; this.end = currentPage+2; if(start<=0){ this.start=1; this.end=5; } if(this.end > this.totalPage){ this.end=totalPage; this.start=end-4; } } } public int getCurrentPage() { return currentPage; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public int getPageCount() { return pageCount; } public void setPageCount(int pageCount) { this.pageCount = pageCount; } public int getTotalCount() { return totalCount; } public void setTotalCount(int totalCount) { this.totalCount = totalCount; } public int getTotalPage() { return totalPage; } public void setTotalPage(int totalPage) { this.totalPage = totalPage; } public int getStartIndex() { return startIndex; } public void setStartIndex(int startIndex) { this.startIndex = startIndex; } public List<T> getPageData() { return pageData; } public void setPageData(List<T> pageData) { this.pageData = pageData; } public int getStart() { return start; } public void setStart(int start) { this.start = start; } public int getEnd() { return end; } public void setEnd(int end) { this.end = end; } public static long getSerialversionuid() { return serialVersionUID; } }
web层
int currentPage = Integer.valueOf(request.getParameter("currentPage")); int pageCount=7; BlogTypeService blogType = new BlogTypeServiceImpl(); PageBean<BlogType> page = blogType.page(currentPage, pageCount); request.setAttribute("page", page); request.getRequestDispatcher("/jsp/blogType.jsp").forward(request, response);
service层
public PageBean<BlogType> page(int currentPage,int pageCount) { int totalCount=blogType.getTotal(); PageBean<BlogType> pageBean = new PageBean<>(currentPage, pageCount, totalCount); int startIndex = pageBean.getStartIndex(); pageBean.setPageData(blogType.page(startIndex, pageCount)); return pageBean; }
dao层
public PageBean<BlogType> page(int currentPage,int pageCount) { int totalCount=blogType.getTotal(); PageBean<BlogType> pageBean = new PageBean<>(currentPage, pageCount, totalCount); int startIndex = pageBean.getStartIndex(); pageBean.setPageData(blogType.page(startIndex, pageCount)); return pageBean; }
标签:static art 创建 分页显示 lis nal service parameter star
原文地址:https://www.cnblogs.com/cjw554551/p/14099359.html