數據分頁，在開發中必不可少，由于數據量太大，不得不進行處理。但是對于分頁，又有很多種方式，比如使用sql語句的limit，或者使用jquery的插件。但是底層的邏輯，都是需要的。
在這里貼出bean對象的代碼，以及一個輔助類。我做的這個項目是一個個人博客，算是個人網站吧。
(只貼部分底層邏輯代碼)
Page.java
package cn.edu.ldu.util;public class Page { private int everyPage; //每頁顯示的數量 private int totalPage; //總頁數 private int totalCount; //總數量 private int currentPage; //當前頁 private int beginIndex; //起始頁 private boolean hasPrepage; //是否有上一頁 private boolean hasNextPage; //是否有下一頁 public Page() { } public Page(int everyPage, int totalPage, int totalCount, int currentPage,int beginIndex, boolean hasPrepage, boolean hasNextPage) { this.everyPage = everyPage; this.totalPage = totalPage; this.totalCount = totalCount; this.currentPage = currentPage; this.beginIndex = beginIndex; this.hasPrepage = hasPrepage; this.hasNextPage = hasNextPage; } public int getEveryPage() { return everyPage; } public void setEveryPage(int everyPage) { this.everyPage = everyPage; } public int getTotalPage() { return totalPage; } public void setTotalPage(int totalPage) { this.totalPage = totalPage; } public int getTotalCount() { return totalCount; } public void setTotalCount(int totalCount) { this.totalCount = totalCount; } public int getCurrentPage() { return currentPage; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public int getBeginIndex() { return beginIndex; } public void setBeginIndex(int beginIndex) { this.beginIndex = beginIndex; } public boolean isHasPrepage() { return hasPrepage; } public void setHasPrepage(boolean hasPrepage) { this.hasPrepage = hasPrepage; } public boolean isHasNextPage() { return hasNextPage; } public void setHasNextPage(boolean hasNextPage) { this.hasNextPage = hasNextPage; }}PageUtil.java
package cn.edu.ldu.util;public class PageUtil { //創建分頁信息對象 public static Page createPage(int everyPage,int totalCount,int currentPage) { everyPage = getEveryPage(everyPage); currentPage = getCurrentPage(currentPage); int totalPage = getTotalPage(everyPage, totalCount); int beginIndex = getBeginIndex(everyPage, currentPage); boolean hasPrePage = getHasPrePage(currentPage); boolean hasNextPage = getHasNextPage(totalPage, currentPage); return new Page(everyPage, totalPage,totalCount, currentPage, beginIndex, hasPrePage, hasNextPage); } //獲得每頁顯示記錄數 public static int getEveryPage(int everyPage) { return everyPage == 0 ? 10 : everyPage; } //獲得當前頁 public static int getCurrentPage(int currentPage) { return currentPage == 0 ? 10 : currentPage; } //獲得總頁數 public static int getTotalPage(int everyPage,int totalCount) { int totalPage=0; //要判斷每頁是否滿頁，否則頁數+1 if(totalCount!=0 && totalCount%everyPage==0) { totalPage=totalCount/everyPage; } else { totalPage=totalCount/everyPage+1; } return totalPage; } //獲得起始位置 public static int getBeginIndex(int everyPage,int currentPage) { return everyPage*(currentPage-1); } //判斷是否有上一頁 public static boolean getHasPrePage(int currentPage) { return currentPage== 1 ? false : true; } //判斷是否有下一頁 public static boolean getHasNextPage(int totalPage, int currentPage) { return (currentPage == totalPage) || (totalPage == 0) ? false : true; }}每次我只需要去調用即可。
//傳入每頁顯示的頁數，總記錄數，當前頁Page page=PageUtil.createPage(5, diaryDao.findAllCount(), currentPage);
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VeVb武林網。
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