PL/SQL中编写Oracle数据库分页的存储过程

create or replace package pagingPackage as 
type paging_cursor is ref cursor; 
end pagingPackage; 

select * from  
(select t1.*,rownum rn from (select * from emp) t1 where rownum<=12) 
where rn>=8;

create procedure paging 
(tableName in varchar2 ,--表名 
pageSizes in number,--每页显示记录数 
pageNow in number,--当前页 
rowNums out number,--总记录数 
pageNum out number,--总页数 
paging_cursor out pagingPackage.paging_cursor) is  
--定义部分 
--定义sql语句，字符串 
v_sql varchar2(1000); 
--定义两个整数，用于表示每页的开始和结束记录数 
v_begin number:=(pageNow-1)*pageSizes+1; 
v_end number:=pageNow*pageSizes; 
begin 
 --执行部分 
 v_sql:='select * from (select t1.*,rownum rn from (select * from '||tableName||') t1 where rownum<='||v_end||') where rn>='||v_begin; 
 --把游标和sql语句关联 
 open paging_cursor for v_sql; 
 --计算rowNums和pageNum 
 --组织一个sql语句 
 v_sql:='select count(*) from '||tableName; 
 --执行该sql语句,并赋给rowNums 
 execute immediate v_sql into rowNums; 
 --计算pageNum 
 if mod(rowNums,pageSizes)=0 then 
  pageNum := rowNums/pageSizes; 
  else 
   pageNum := rowNums/pageSizes+1; 
   end if; 
 end; 

package .test.oracletest; 
import java.sql.CallableStatement; 
import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
//测试分页 
public class OraclePaging { 
  public static void main(String[] args) { 
    try { 
      // 加载驱动 
      Class.forName("oracle.jdbc.driver.OracleDriver"); 
      // 获取连接 
      Connection connection = DriverManager.getConnection( 
          "jdbc:oracle:thin:@127.0.0.1:1521:ORCL", "SCOTT", "tiger"); 
      // 创建CallableStatement，调取数据库的存储过程 
      CallableStatement cst = connection 
          .prepareCall("{call paging(?,?,?,?,?,?)}"); 
      // 给？赋值 
      cst.setString(1, "emp"); 
      cst.setInt(2, 6); 
      cst.setInt(3, 2); 
      // 注册存储过程的输出项 
      cst.registerOutParameter(4, oracle.jdbc.OracleTypes.INTEGER); 
      cst.registerOutParameter(5, oracle.jdbc.OracleTypes.INTEGER); 
      cst.registerOutParameter(6, oracle.jdbc.OracleTypes.CURSOR); 
      // 执行 
      cst.execute(); 
      // 获取输出项 
      int rowNums = cst.getInt(4); 
      int pageNum = cst.getInt(5); 
      ResultSet rs = (ResultSet) cst.getObject(6); 
      System.out.println("总记录数rowNums = " + rowNums); 
      System.out.println("总页数pageNum = " + pageNum); 
      System.out.println("EMPNO" + '\t' + "ENAME" + '\t' + "ROWNUM"); 
      while (rs.next()) { 
        System.out.println(rs.getInt("EMPNO") + " " + '\t' 
            + rs.getString("ENAME") + '\t' + rs.getInt("RN")); 
      } 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } finally { 
      // 关闭资源 
    } 
  } 
}