说到分页算法,一般WEB开发都会用到,我只是在我实现.docVIP

说到分页算法，一般WEB开发都会用到，我只是在我的实现技术上用了struts框架，其实原理都一样的。看了网上相当多的分页算法，有对的也有好多是错的，更有好多是不太优化的。还有以前自己在augmentum做的一个分页算法，总结了一些不足。决定重新再写一个分页算法。首先，应该写个bean来记录存储一些页面的属性分页大致需要如下属性：?private?int?currentPage?=?1;?//?当前页?private?int?totalPages?=?0;?//?总页数?private?int?pageRecorders?=?5;//?每页5条数据??private?int?totalRows?=?0;?//?总数据数?private?int?pageStartRow?=?0;//?每页的起始数?private?int?pageEndRow?=?0;?//?每页显示数据的终止数?private?boolean?hasNextPage?=?false;?//?是否有下一页?private?boolean?hasPreviousPage?=?false;?//?是否有前一页??private?int?nextPage?=?0;//下一页的页码??private?int?previousPage?=?0;//上一页的页码然后这些属性之间是有联系的，我们可以在构造函数的时候就初始化一些属性有两种方法：一，根据总的页数，（假设当前页为1）?public?PageBean(int?totalRows){??this.totalRows?=?totalRows;??this.currentPage?=?1;??hasPreviousPage?=?false;??if?((totalRows?%?pageRecorders)?==?0)?{???totalPages?=?totalRows?/?pageRecorders;??}?else?{???totalPages?=?totalRows?/?pageRecorders?+?1;??}??if?(totalRows?=?pageRecorders)?{???hasNextPage?=?true;???nextPage?=?2;???this.pageEndRow?=?pageRecorders;??}?else?{???this.pageEndRow?=?totalRows;???hasNextPage?=?false;???nextPage?=?1;??}???this.pageStartRow?=?0;?????previousPage?=?1;?}然后在按下一页或者上一页的时候需要如下函数处理：public?void?nextPage()?{??if(hasNextPage?==?true)??currentPage?=?currentPage?+?1;??if?((currentPage??)??)爗牋爃asPreviousPage?爐rue;牋}爀lse爗牋爃asPreviousPage?爁alse;牋}牋if?currentPage?=爐otalPages)爗牋爃asNextPage?爁alse;牋爐his.nextPage?燾urrentPage;牋}爀lse爗牋爃asNextPage?爐rue;牋爊extPage?燾urrentPage+1;牋}牋this.pageStartRow??currentPage?1)?爌ageRecorders;牋if(hasNextPage?=爐rue)牋this.pageEndRow?爌ageStartRow??;牋else{牋爐his.pageEndRow?this.totalPages;牋}牋previousPage?燾urrentPage??;爙?爌ublic爒oid爌reviousPage()爗牋if(hasPreviousPage?=爐rue)牋currentPage?燾urrentPage??;牋if?currentPage?=?)爗牋燾urrentPage??;牋}牋if?currentPage?=爐otalPages)爗牋爃asNextPage?爁alse;牋}爀lse爗牋爃asNextPage?爐rue;牋}牋nextPage?燾urrentPage??;牋if?(currentPage??)??)爗牋爃asP