Bootstrap和Java分页实例第一篇
发布时间：2020-12-18 00:44:09 所属栏目：安全 来源：网络整理
导读：关于此文 bootstrap是前端很流行的框架，正在开发的项目，用bootstrap搭建起来的页面，自我感觉很完美，终于告别了苍白无力的白花花的难看的……的页面了。哈哈。 现在遇到了bootstrap的分页与Java后台结合起来的分页封装问题，对于我这个Java菜鸟来说，包装
关于此文bootstrap是前端很流行的框架，正在开发的项目，用bootstrap搭建起来的页面，自我感觉很完美，终于告别了苍白无力的白花花的难看的……的页面了。哈哈。 现在遇到了bootstrap的分页与Java后台结合起来的分页封装问题，对于我这个Java菜鸟来说，包装分页还没玩过。故此，在网上找了这个。觉得很不错，所以决定记录到博客里面。 还没有实践，决定写完博客去实践。在上图。祝我成功吧！ 此人的博客没找到，代码中有email地址。 pagination定义了分页常用的属性,方法
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public interface Pagination
/**
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/**
/**
BetweenIndex该接口负责获取分页链接的开始和结尾索引 */ public interface BetweenIndex { /** */ int getBeginIndex(); /** */ int getEndIndex(); } DefaultPaginationPagination接口的默认实现类 / public class DefaultPagination private int totalElements; private int pageSize; private int totalPages; private int pageIndex; private QueryHandler private List private int pageLinkNumber; public DefaultPagination(int pageIndex,int pageSize,QueryHandler this(pageIndex,pageSize,queryHandler); setPageLinkNumber(pageLinkNumber); } public DefaultPagination(int pageIndex,QueryHandler //初始化数据访问回调接口 this.queryHandler = queryHandler; //查询总行数 setTotalElements(); //修正页大小 setPageSize(pageSize); //计算总页数: setTotalPages(); //修正页码 setPageIndex(pageIndex); //查询当前页数据 setCurrData(); } private void setCurrData() { // TODO Auto-generated method stub this.currData = queryHandler.getCurrData(pageIndex,pageSize); } private void setPageIndex(int pageIndex) { // TODO Auto-generated method stub if(pageIndex < 1) { this.pageIndex = 1; } else if(pageIndex > totalPages) { this.pageIndex = totalPages; } else { this.pageIndex = pageIndex; } } private void setTotalPages() { // TODO Auto-generated method stub if(pageSize > 0) { / this.totalPages = totalElements % pageSize == 0 ? totalElements / pageSize : (totalElements / pageSize) + 1;*/ //减一公式: this.totalPages = (totalElements + pageSize - 1) / pageSize; } } private void setPageSize(int pageSize) { // TODO Auto-generated method stub if(pageSize < 1) { this.pageSize = 1; } else if(pageSize > totalElements) { this.pageSize = totalElements; } else { this.pageSize = pageSize; } } private void setTotalElements() { // TODO Auto-generated method stub this.totalElements = queryHandler.getTotalElements(); } @Override public boolean isFirst() { // TODO Auto-generated method stub return pageIndex == 1; } @Override public boolean isLast() { // TODO Auto-generated method stub return pageIndex == totalPages; } @Override public boolean isPrevious() { // TODO Auto-generated method stub return pageIndex > 1; } @Override public boolean isNext() { // TODO Auto-generated method stub return pageIndex < totalPages; } @Override public int getPreviousIndex() { // TODO Auto-generated method stub return isPrevious() ? pageIndex - 1 : 1; } @Override public int getNextIndex() { // TODO Auto-generated method stub return isNext() ? pageIndex + 1 : totalPages; } @Override public int getPageIndex() { // TODO Auto-generated method stub return pageIndex; } @Override public int getPageSize() { // TODO Auto-generated method stub return pageSize; } @Override public int getTotalPages() { // TODO Auto-generated method stub return totalPages; } @Override public int getTotalElements() { // TODO Auto-generated method stub return totalElements; } @Override public List // TODO Auto-generated method stub return currData; } @Override public BetweenIndex getBetweenIndex() { // TODO Auto-generated method stub return new BetweenIndex() { private int beginIndex; private int endIndex; { boolean isOdd = pageLinkNumber % 2 == 0; int val = pageLinkNumber / 2; beginIndex = pageIndex - (isOdd ? val - 1: val); endIndex = pageIndex + val; if(beginIndex < 1) { beginIndex = 1; endIndex = pageLinkNumber; } if(endIndex > totalPages) { endIndex = totalPages; beginIndex = endIndex - pageLinkNumber + 1; } } @Override public int getEndIndex() { // TODO Auto-generated method stub return endIndex; } @Override public int getBeginIndex() { // TODO Auto-generated method stub return beginIndex; } }; } @Override public int getPageLinkNumber() { // TODO Auto-generated method stub return pageLinkNumber; } @Override public void setPageLinkNumber(int pageLinkNumber) { // TODO Auto-generated method stub if (pageLinkNumber < 0) { this.pageLinkNumber = 0; } else if (pageLinkNumber > totalPages) { this.pageLinkNumber = totalPages; } else { this.pageLinkNumber = pageLinkNumber; } } } QueryHandler用于DefaultPagination实现类的查询回调接口 */ public interface QueryHandler /** */ int getTotalElements(); /**
BookDaoImplBookDao的实现类(BookDao接口已经省略) ());
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return 0;
}
@Override
public List
BookServiceImplBookService业务逻辑接口的实现类 (BookService已经省略) */ public class BookServiceImpl implements BookService { private BookDao bookDao = new BookDaoImpl(); @Override public Pagination // TODO Auto-generated method stub return new DefaultPagination @Override public int getTotalElements() { // TODO Auto-generated method stub return bookDao.count(); } @Override public List // TODO Auto-generated method stub return bookDao.getBooks(pageIndex,pageSize); } },pageLinkNumber); } } BookAction有关图书的Servlet控制器 bookPagination = bookService.getBookList(pageIndex,6);
request.setAttribute("bookPagination",bookPagination);
request.getRequestDispatcher("index.jsp").forward(request,response);
}
}
Jspindex.jsp 将Pagiation应用到bootstrap上的简单示例bootstrap版本: 3.3.5
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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