分页技术(2)

来源：互联网发布：网络推手公司哪个好编辑：程序博客网时间：2024/06/10 21:28

public int getStart(){
return start;
}
public int getEnd(){
int end = this.getStart() + this.getSize() -1;
if (end<0) {
end = 0;
}
return end;
}
public int getStartOfPreviousPage() {
return Math.max(start-myPageSize, 1);
}
public int getStartOfNextPage() {
return start + avaCount;
}
public static int getStartOfAnyPage(int pageNo){
return getStartOfAnyPage(pageNo, DEFAULT_PAGE_SIZE);
}
public static int getStartOfAnyPage(int pageNo, int pageSize){
int startIndex = (pageNo-1) * pageSize + 1;
if ( startIndex < 1) startIndex = 1;
//System.out.println("Page No to Start Index: " + pageNo + "-" + startIndex);
return startIndex;
}
public int getSize() {
return avaCount;
}
public int getTotalSize() {
return this.totalSize;
}
public int getCurrentPageNo(){
return this.currentPageno;
}
public int getTotalPageCount(){
return this.totalPageCount;
}
public String getHTML(String queryJSFunctionName, String pageNoParamName){
if (getTotalPageCount()<1){
return "<input type='hidden' name='"+pageNoParamName+"' value='1' >";
}
if (queryJSFunctionName == null || queryJSFunctionName.trim().length()<1) {
queryJSFunctionName = "gotoPage";
}
if (pageNoParamName == null || pageNoParamName.trim().length()<1){
pageNoParamName = "pageno";
}
String gotoPage = "_"+queryJSFunctionName;
StringBuffer html = new StringBuffer("\n");
html.append("<script language=\"Javascript1.2\">\n")
.append("function ").append(gotoPage).append("(pageNo){ \n")
.append( " var curPage=1; \n")
.append( " try{ curPage = document.all[\"")
.append(pageNoParamName).append("\"].value; \n")
.append( " document.all[\"").append(pageNoParamName)
.append("\"].value = pageNo; \n")
.append( " ").append(queryJSFunctionName).append("(pageNo); \n")
.append( " return true; \n")
.append( " }catch(e){ \n")
// .append( " try{ \n")
// .append( " document.forms[0].submit(); \n")
// .append( " }catch(e){ \n")
.append( " alert('尚未定义查询方法：function ")
.append(queryJSFunctionName).append("()'); \n")
.append( " document.all[\"").append(pageNoParamName)
.append("\"].value = curPage; \n")
.append( " return false; \n")
// .append( " } \n")
.append( " } \n")
.append( "}")
.append( "</script> \n")
.append( "");
html.append( "<table border=0 cellspacing=0 cellpadding=0 align=center width=80%> \n")
.append( " <tr> \n")
.append( " <td align=left><br> \n");
html.append( " 共" ).append( getTotalPageCount() ).append( "页")
.append( " [") .append(getStart()).append("..").append(getEnd())
.append("/").append(this.getTotalSize()).append("] \n")
.append( " </td> \n")
.append( " <td align=right> \n");
if (hasPreviousPage()){
html.append( "[<a href='javascript:").append(gotoPage)
.append("(") .append(getCurrentPageNo()-1)
.append( ")'>上一页</a>] \n");
}
html.append( " 第")
.append( " <select name='")
.append(pageNoParamName).append("' onChange='javascript:")
.append(gotoPage).append("(this.value)'>\n");
String selected = "selected";
for(int i=1;i<=getTotalPageCount();i++){
if( i == getCurrentPageNo() )
selected = "selected";
else selected = "";
html.append( " <option value='").append(i).append("' ")
.append(selected).append(">").append(i).append("</option> \n");
}
if (getCurrentPageNo()>getTotalPageCount()){
html.append( " <option value='").append(getCurrentPageNo())
.append("' selected>").append(getCurrentPageNo())
.append("</option> \n");
}
html.append( " </select>页 \n");
if (hasNextPage()){
html.append( " [<a href='javascript:").append(gotoPage)
.append("(").append((getCurrentPageNo()+1))
.append( ")'>下一页</a>] \n");
}
html.append( "</td></tr></table> \n");
return html.toString();
}
}
///////////////////////////////////
//
// RowSetPage.java
// author: evan_zhao@hotmail.com
//
///////////////////////////////////
package page;
import javax.sql.RowSet;
public class RowSetPage extends Page {
private javax.sql.RowSet rs;
public static final RowSetPage EMPTY_PAGE = new RowSetPage();
public RowSetPage(){
this(null, 0,0);
}
public RowSetPage(RowSet crs, int start, int totalSize) {
this(crs,start,totalSize,Page.DEFAULT_PAGE_SIZE);
}
public RowSetPage(RowSet crs, int start, int totalSize, int pageSize) {
try{
int avaCount=0;
if (crs!=null) {
crs.beforeFirst();
if (crs.next()){
crs.last();
avaCount = crs.getRow();
}
crs.beforeFirst();
}
rs = crs;
super.init(start,avaCount,totalSize,pageSize,rs);
}catch(java.sql.SQLException sqle){
throw new RuntimeException(sqle.toString());
}
}
public javax.sql.RowSet getRowSet(){
return rs;
}
}
///////////////////////////////////
//
// PagedStatement.java
// author: evan_zhao@hotmail.com
//
///////////////////////////////////
package page;
import foo.DBUtil;
import java.math.BigDecimal;
import java.util.List;
import java.util.Iterator;
import java.util.Collections;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.PreparedStatement;
import java.sql.Timestamp;
import javax.sql.RowSet;
public abstract class PagedStatement {
public final static int MAX_PAGE_SIZE = Page.MAX_PAGE_SIZE;
protected String countSQL, querySQL;
protected int pageNo,pageSize,startIndex,totalCount;
protected javax.sql.RowSet rowSet;
protected RowSetPage rowSetPage;
private List boundParams;
/**
* 构造一查询出所有数据的PageStatement
* @param sql