如何实现一个简单的分页

如何实现一个简单的分页

public class Page {

private long totalCount = 0;// 总记录数
private int pageNumber = 1;// 当前页号，默认显示第一页
private int pageSize = 20; // 每页大小，默认每页20条
private int totalPage = 0;// 总页数，默认为0
private int startRow = 0;// 起始记录行号，默认为从表头开始


public void pagination() {
// 计算总页数
if (this.totalCount % pageSize == 0)
this.totalPage = new Long(this.totalCount / pageSize).intValue();
else
this.totalPage = new Long(this.totalCount / pageSize).intValue() + 1;
// 排除错误页号
if (this.pageNumber < 1)
this.pageNumber = 1;
if (this.pageNumber > this.totalPage)
this.pageNumber = this.totalPage;
// 计算起始行号
this.startRow = (this.pageNumber - 1) * this.pageSize;
}

public long getTotalCount() {
return totalCount;
}

public void setTotalCount(long totalCount) {
this.totalCount = totalCount;
this.pagination();
}

public int getPageNumber() {
return pageNumber;
}

public void setPageNumber(int pageNumber) {
this.pageNumber = pageNumber;
}

public int getPageSize() {
return pageSize;
}

public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}

public int getTotalPage() {
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}

public int getStartRow() {
return startRow;
}

public void setStartRow(int startRow) {
this.startRow = startRow;
}

}