一个struts+sql server得分页(存储过程版)

sql server分页使用存储过程要更高效些
下面这个存储过程是从SQL区找到的

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CREATE Proc p_show
@QueryStr varchar(8000), --表名、视图名、查询语句
@PageSize int=10,   --每页的大小(行数)
@PageCurrent int=1,   --要显示的页
@FdShow varchar (8000)='''''''', --要显示的字段列表,如果查询结果有标识字段,需要指定此值,且不包含标识字段
@FdOrder nvarchar (3000)='''''''' --排序字段列表
as
declare @FdName nvarchar(550) --表中的主键或表、临时表中的标识列名
 ,@Id1 varchar(80),@Id2 varchar(80) --开始和结束的记录号
 ,@Obj_ID int    --对象ID
--表中有复合主键的处理
declare @strfd nvarchar(4000) --复合主键列表
 ,@strjoin varchar(8000) --连接字段
 ,@strwhere nvarchar(4000) --查询条件

select @Obj_ID=object_id(@QueryStr)
 ,@FdShow=case isnull(@FdShow,'''''''') when '''''''' then '''' *'''' else '''' ''''+@FdShow end
 ,@FdOrder=case isnull(@FdOrder,'''''''') when '''''''' then '''''''' else '''' order by ''''+@FdOrder end
 ,@QueryStr=case when @Obj_ID is not null then '''' ''''+@QueryStr else '''' (''''+@QueryStr+'''') a'''' end

--如果显示第一页，可以直接用top来完成
if @PageCurrent=1
begin
 select @Id1=cast(@PageSize as varchar(50))
 exec(''''select top ''''+@Id1+@FdShow+'''' from ''''+@QueryStr+@FdOrder)
 return
end

--如果是表,则检查表中是否有标识更或主键
if @Obj_ID is not null and objectproperty(@Obj_ID,''''IsTable'''')=1
begin
 select @Id1=cast(@PageSize as varchar(50))
  ,@Id2=cast((@PageCurrent-1)*@PageSize as varchar(50))

 select @FdName=name from syscolumns where id=@Obj_ID and status=0x80
 if @@rowcount=0   --如果表中无标识列,则检查表中是否有主键
 begin
  if not exists(select 1 from sysobjects where parent_obj=@Obj_ID and xtype=''''PK'''')
   goto lbusetemp  --如果表中无主键,则用临时表处理

  select @FdName=name from syscolumns where id=@Obj_ID and colid in(
   select colid from sysindexkeys where @Obj_ID=id and indid in(
    select indid from sysindexes where @Obj_ID=id and name in(
     select name from sysobjects where xtype=''''PK'''' and parent_obj=@Obj_ID
   )))
  if @@rowcount>1  --检查表中的主键是否为复合主键
  begin
   select @strfd='''''''',@strjoin='''''''',@strwhere=''''''''
   select @strfd=@strfd+'''',[''''+name+'''']''''
    ,@strjoin=@strjoin+'''' and a.[''''+name+'''']=b.[''''+name+'''']''''
    ,@strwhere=@strwhere+'''' and b.[''''+name+''''] is null''''
    from syscolumns where id=@Obj_ID and colid in(
    select colid from sysindexkeys where @Obj_ID=id and indid in(
     select indid from sysindexes where @Obj_ID=id and name in(
      select name from sysobjects where xtype=''''PK'''' and parent_obj=@Obj_ID
    )))
   select @strfd=substring(@strfd,2,2000)
    ,@strjoin=substring(@strjoin,5,4000)
    ,@strwhere=substring(@strwhere,5,4000)
   goto lbusepk
  end
 end
end
else
 goto lbusetemp

/*--使用标识列或主键为单一字段的处理方法--*/
lbuseidentity:
 exec(''''select top ''''+@Id1+@FdShow+'''' from ''''+@QueryStr
  +'''' where ''''+@FdName+'''' not in(select top ''''
  +@Id2+'''' ''''+@FdName+'''' from ''''+@QueryStr+@FdOrder
  +'''')''''+@FdOrder
  )
 return

/*--表中有复合主键的处理方法--*/
lbusepk: 
 exec(''''select ''''+@FdShow+'''' from(select top ''''+@Id1+'''' a.* from
  (select top 100 percent * from ''''+@QueryStr+@FdOrder+'''') a
  left join (select top ''''+@Id2+'''' ''''+@strfd+''''
  from ''''+@QueryStr+@FdOrder+'''') b on ''''+@strjoin+''''
  where ''''+@strwhere+'''') a''''
  )
 return

/*--用临时表处理的方法--*/
lbusetemp: 
select @FdName=''''[ID_''''+cast(newid() as varchar(80))+'''']''''
 ,@Id1=cast(@PageSize*(@PageCurrent-1) as varchar(50))
 ,@Id2=cast(@PageSize*@PageCurrent-1 as varchar(50))

exec(''''select ''''+@FdName+''''=identity(int,0,1),''''+@FdShow+''''
  into #tb from''''+@QueryStr+@FdOrder+''''
 select ''''+@FdShow+'''' from #tb where ''''+@FdName+'''' between ''''
 +@Id1+'''' and ''''+@Id2
 )
GO
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这里需要建立一个分页类ResultGatherPro.java

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package com;

import conn.DBConnManager;//这个是数据库连接池，可以替换成自己的
import java.sql.*;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import java.util.ArrayList;
import java.util.HashMap;
import javax.servlet.http.HttpServletRequest;
import com.util.myRedirect;

public class ResultGatherPro
{
 private String sql;
 private int intPageSize; //每页行数
 private int intRowCount;
 private int intPageCount;
 private int intPage; //页号
 private String Counter;

 public ResultGatherPro()
 {
  
 }
 public ResultGatherPro(String sqlcom,int rownum,int pagenum,String counter)
 {
  sql=sqlcom;
  intPageSize = rownum;
  intPage = pagenum;
  Counter = counter;
 }
 public List selectRS(String sqlcom,int rownum,int pagenum,String counter)
 {
  this.sql = sqlcom;
  this.intPageSize = rownum;
  this.intPage = pagenum;
  this.Counter = counter;
  return selectRS();
 }
 public List selectRS()
 {
  List rsall = new ArrayList();
  Map rsTree;
  DBConnManager conn = null;
  Connection  con = null;
  CallableStatement stmt = null;
  ResultSet rs = null;
  Statement st = null;
  ResultSet rsc = null;
  try{
   conn = DBConnManager.getInstance();
   con = conn.getConnection("mssql");
   st = con.createStatement();
   rsc=st.executeQuery(Counter);
   while(rsc.next())
   {
    intRowCount=rsc.getInt("allrow");
   }

   stmt = con.prepareCall("{call p_show(''''"+sql+"'''',"+intPageSize+","+intPage+")}");
   rs = stmt.executeQuery();
   ResultSetMetaData rsmd = rs.getMetaData();
   int numberOfColumns = rsmd.getColumnCount();
   Object[] aa = new Object[numberOfColumns-1];
   intPageCount = (intRowCount+intPageSize-1)/intPageSize;   
   while(rs.next())
   { 
    rsTree = new HashMap(numberOfColumns);
    for(int r=1;r<numberOfColumns+1;r++)
    {
     rsTree.put(rsmd.getColumnName(r),rs.getObject(r));      
    }
    rsall.add(rsTree);
   }   
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }finally{
   try{

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