学习实例.文章管理.分页查询类.Page.java

package business;
import java.sql.*;

public class Page {
DBUtil Conn = new DBUtil();
String TableName;
String QueryString;
String QueryFields;
String OrderString;
String CountField;
int curPage;
int RecordsCount;
int TotalPage;
int PageSize;

public String getCountField() {
return CountField;
}
public void setCountField(String countField) {
CountField = countField;
}
public int getCurPage() {
return curPage;
}
public void setCurPage(int curPage) {
this.curPage = curPage;
}
public String getOrderString() {
return OrderString;
}
public void setOrderString(String orderString) {
OrderString = orderString;
}
public int getPageSize() {
return PageSize;
}
public void setPageSize(int pageSize) {
PageSize = pageSize;
}
public String getQueryFields() {
return QueryFields;
}
public void setQueryFields(String queryFields) {
QueryFields = queryFields;
}
public String getQueryString() {
return QueryString;
}
public void setQueryString(String queryString) {
QueryString = queryString;
}
public int getRecordsCount() {
return RecordsCount;
}
public void setRecordsCount(int recordsCount) {
RecordsCount = recordsCount;
}
public String getTableName() {
return TableName;
}
public void setTableName(String tableName) {
TableName = tableName;
}
public int getTotalPage() {
return TotalPage;
}
public void setTotalPage(int totalPage) {
TotalPage = totalPage;
}
public Page(){
QueryFields = "*";
QueryString = "";
CountField = "ID";
OrderString = " Order BY ID DESC";
curPage = 1;
PageSize = 10;
}
public ResultSet PageSplit() throws Exception{
ResultSet rsA = null;

try{
//取得记录数与总页数
String sql = "select Count(" + CountField + ") as iCount From " + TableName + " where 1=1" + QueryString + "";
rsA = Conn.Execute(sql);
while(rsA.next()){
RecordsCount = rsA.getInt("iCount");
}
rsA.close();

TotalPage = RecordsCount / PageSize;
if (RecordsCount % PageSize>0){TotalPage++;}
if(curPage<=0){curPage=1;}
if(curPage>TotalPage){curPage=TotalPage;}

//取得列表
sql="SELECT top " + curPage * PageSize + " " + QueryFields + " FROM " + TableName + " where 1=1" + QueryString + " " + OrderString;
rsA = Conn.Execute(sql);
int iRow = (curPage - 1) * PageSize + 1;
if(iRow==0){iRow=1;}
if(iRow>1){
rsA.absolute(iRow - 1);
}
}catch(Exception e){
System.out.println("PageSplit：" + e.getMessage());
}
return rsA;
}
}