Java调用Oracle数据库的分页存储过程

最近项目进度比较缓慢，初步研究了一下Oracle的存储过程，将代码贴出来。

首先先贴出来Oracle的分页分页存储过程代码吧。

1.这是包的代码

create or replace package DB_Oper is

-- Author : LIUBING
-- Created : 2009-10-28 15:01:30
-- Purpose : 测试Oracle的分页存储过程

-- Public type declarations
type ref_DataSet is REF CURSOR;

-- Public function and procedure declarations
function GetCount(mTableName varchar2, mTerm varchar2) return number;
procedure return_DataSet(
mTableName in varchar2, --表名
mTerm in varchar2, --条件
mPageSize in number, --每页显示记录数
mPageIndex in number, --当前页
mOrderField in varchar2, --排序字段
mOrderStyle in number, --排序方式 0 升序 1 降序
mTotalRecords out number, --总记录数
mDateSet out ref_DataSet --记录
);

end DB_Oper;

2.这是包体的代码

create or replace package body DB_Oper is

----- 获取记录数 ------
function GetCount(mTableName varchar2, mTerm varchar2) return number is
i number;
vSql varchar2(1000);
begin
i := 0;
vSql := 'select count(*) from ' || mTableName ;

if length(mTerm) > 0 then
vSql := vSql || ' where ' || mTerm;
end if;

execute IMMEDIATE vSql into i;

return(i);
end;

----- 数据分页 ----------
procedure return_DataSet(
mTableName in varchar2, --表名
mTerm in varchar2, --条件
mPageSize in number, --每页显示记录数
mPageIndex in number, --当前页
mOrderField in varchar2, --排序字段
mOrderStyle in number, --排序方式 0 升序 1 降序
mTotalRecords out number, --总记录数
mDateSet out ref_DataSet --记录集
) is
begin
declare
Invalid_Input Exception;
vSql varchar2(1000);
Start_page number;
End_page number;
n_PageIndex number;
n_PageSize number;
--mTotalRecords number;
begin
mTotalRecords := GetCount(trim(mTableName), trim(mTerm));
vSql := 'select * from ' || mTableName;
if length(trim(mTerm)) > 0 then
vSql := vSql || ' where ' || trim(mTerm) ;
end if;
if length(trim(mOrderField)) > 0 then
begin
vSql := vSql || ' order by ' || trim(mOrderField);
if morderStyle > 0 then
vSql := vSql || ' desc ';
end if;
end;
end if;

--
n_PageSize := mPageSize;
if mPageSize <= 0 then
n_PageSize := 10;
end if;
n_PageIndex := mPageIndex;
if mPageIndex <= 0 then
n_PageIndex := 1;
end if;
if mTotalRecords > 0 and n_PageIndex > 1 then
begin
--如果n_pageindex大于实际的页数，则取实际页数
if n_PageIndex > round((mTotalRecords / n_PageSize) + 0.5) then
n_PageIndex := round((mTotalRecords / n_PageSize) + 0.5);
end if;
end;
end if;
Start_page := (n_PageIndex - 1) * n_PageSize + 1;
End_page := n_PageIndex * n_PageSize;
vSql := 'SELECT * FROM (SELECT A.*, rownum r FROM ( ' || vSql || ' ) A WHERE rownum <= ' || End_page || ' ) B WHERE r >= '|| Start_page;

Open mDateSet for vSql;

exception
When Invalid_Input Then
open mDateSet for select null from dual;
end;
end return_DataSet;
end DB_Oper;

3.这是Java的测试代码

public class ConnToOracle {
    final static Logger logger = Logger.getLogger(ConnToOracle.class);
    public static Connection getConnection(String url, String userName, String password) {
        Connection conn = null;
        try {
            DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
            conn = DriverManager.getConnection(url, userName, password);
            System.out.println("Connection Starting.......");
        }  catch (SQLException e) {
            logger.error("Connection error......");
        }
        return conn;
    }
    public static void select() throws Exception {
        Connection conn = null;
        try {
            conn = getConnection("jdbc:oracle:thin:@192.168.6.80:1521:C2SServer", "d1xn_cmc","d1xn_cmc");
//          String call= "{call DB_Oper.return_DataSet(?,?,?,?,?,?,?,?)}";这种条用方式也是OK的
            String call= "begin DB_Oper.return_DataSet(?,?,?,?,?,?,?,?);end;";
            CallableStatement proc = conn.prepareCall(call);
            proc.setString(1, "game_goods");
            proc.setString(2, null);
            proc.setString(3, "20");
            proc.setString(4, "1");
            proc.setString(5, "n_ID");
            proc.setString(6, "0");
            proc.registerOutParameter(7, OracleTypes.NUMBER);//注册返回的总记录数的数据类型
            proc.registerOutParameter(8, OracleTypes.CURSOR);//注册返回的数据结果集的数据类型
            proc.execute();
            int a1 = proc.getInt(7);//获得总的记录集
            System.out.println(a1);
            ResultSet rs = (ResultSet)proc.getObject(8);//获得返回的数据集
            while (rs.next()) {
                System.out.println(rs.getString(1));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.close();
            }
        }
    }
}