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最新推荐文章于 2022-03-02 16:19:05 发布

原创最新推荐文章于 2022-03-02 16:19:05 发布 · 132 阅读

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本文介绍了一个简单的分页组件的Java实现，该组件能够根据当前页码和记录总数自动计算出分页导航所需的参数，如总页数、当前页显示的记录范围等。文章通过具体的代码展示了如何进行分页逻辑的计算。

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package gov.hn.hrss.web.page;

public class Page {
private int pagesize = 10, pagecount, liststep = 20, currentpage = 1,
recordcount, listbegin, listend, recordbegin, recordend = 0;

public Page(int current, int recordcount) {
super();
this.currentpage = current;
this.recordcount = recordcount;
pagecount = (int) Math.ceil((double) recordcount / pagesize);// 求总页数，ceil（num）取整不小于num
if (pagecount < current) {
currentpage = pagecount;// 如果分页变量大总页数，则将分页变量设计为总页数
}
if (current < 1) {
currentpage = 1;// 如果分页变量小于１,则将分页变量设为１
}
listbegin = (current - (int) Math.ceil((double) liststep / 2));
if (listbegin < 1) {
listbegin = 1;
}
listend = current + liststep / 2;// 分页信息显示到第几页
if (listend > pagecount) {
listend = pagecount + 1;
}
recordbegin = (current - 1) * pagesize;
recordend = recordbegin + pagesize;
if (currentpage == pagecount) {
recordend = (int) (recordbegin + pagesize
* (recordcount % pagesize) * 0.1);
}

}

public int getCurrentpage() {

return currentpage;
}

public void setCurrentpage(int currentpage) {

this.currentpage = currentpage;
}

public int getListbegin() {

return listbegin;
}

public void setListbegin(int listbegin) {

this.listbegin = listbegin;
}

public int getListend() {

return listend;
}

public void setListend(int listend) {

this.listend = listend;
}

public int getListstep() {

return liststep;
}

public void setListstep(int liststep) {

this.liststep = liststep;
}

public int getPagesize() {

return pagesize;
}

public void setPagesize(int pagesize) {

this.pagesize = pagesize;
}

public int getRecordbegin() {

return recordbegin;
}

public void setRecordbegin(int recordbegin) {

this.recordbegin = recordbegin;
}

public int getRecordcount() {

return recordcount;
}

public void setRecordcount(int recordcount) {

this.recordcount = recordcount;
}

public int getRecordend() {

return recordend;
}

public void setRecordend(int recordend) {

this.recordend = recordend;
}

public int getPagecount() {

return pagecount;
}

public void setPagecount(int pagecount) {

this.pagecount = pagecount;
}

}