plsql 存储过程创建和java调用存储过程

一.存储过程

   相对于直接使用SQL 语句，在应用程序中直接调用存储过程有以下好处： 
   (1)减少网络通信量。 
   (2)执行速度更快。创建时候编译,解析,安全检查和优化,后来不需要重复编译,存在内存之中,直接调用效率高 
   (3)更强的适应性。  
   (4) 分布式工作。  

二.简单示例

1.简单的helloword存储过程,可以直接在客户端直接进行调用

 打印Hello World
/*
调用存储过程：
1. exec sayHelloWorld();
2. begin
     sayHelloWorld();
     sayHelloWorld();
   end;
   /

*/
create or replace procedure sayHelloWorld
as
  --说明部分
begin
   dbms_output.put_line('Hello World');

end;
/

2.查询某个员工的信息

--in 输入参数
--out 输出参数
create or replace procedure queryempinfo(eno in number,
                                            pename out varchar2,
                                            psal   out number,
                                            pjob   out varchar2)
as
begin
  select ename,sal,empjob into pename,psal,pjob from emp where empno=eno;
end;
/

3.复杂的存储过程

-- ----------------------------
-- procedure for addonprice_query
-- ----------------------------
-- Create procedure 
create or replace procedure queryAddOnPrice(out_ow_price out number, voy in varchar2,  airportlines in varchar2, transfer in varchar2,
			 leavePortTravelStartDate in varchar2,  leavePortTravelEndDate in varchar2, cab in varchar2, fltNum_addOn_In in varchar2, fltNum_addOn_Out in varchar2 )
as
  
   POW_PRICE INTERNATIONAL_ADDON_XXX.OW_PRICE%type;
begin
     SELECT   n.OW_PRICE into POW_PRICE   from(
--   此处对查询出来的结果集进行分组,排序  partition 是分组
     select t.*,row_number() over(partition by INTERNATIONAL_LIMITED_FLIGHTS ,INLAND_LIMITED_FLIGHTS, 
        LEAVEPORT_TRAVEL_START_DATE, LEAVEPORT_TRAVEL_END_DATE,PUTPORT_TRAVEL_END_DATE,PUTPORT_TRAVEL_START_DATE order by UPDATE_TIME DESC,OW_PRICE asc) row_number  from (
      SELECT
         OW_PRICE,
         PUTPORT_TRAVEL_START_DATE,
         PUTPORT_TRAVEL_END_DATE,
         LEAVEPORT_TRAVEL_START_DATE,
         LEAVEPORT_TRAVEL_END_DATE,
         INTERNATIONAL_LIMITED_FLIGHTS,
         INLAND_LIMITED_FLIGHTS,
         UPDATE_TIME
        FROM
            INTERNATIONAL_ADDON_PRICE  addonprice
        WHERE
            1 = 1
        AND ADDON_AIRLINE_ID IN (
            SELECT
                VOYAGEID
            FROM
                INTERNATIONAL_ADDON_XXX
            WHERE
                voyage = voy
        )
        AND AIRLINES LIKE '%'||airportlines||'%'
        AND TRANSFERS LIKE '%'||transfer||'%'
        AND STATUS = 1
        AND CABIN = cab
        AND ((LEAVEPORT_TRAVEL_START_DATE <= leavePortTravelStartDate AND LEAVEPORT_TRAVEL_END_DATE >= leavePortTravelStartDate)  OR (LEAVEPORT_TRAVEL_START_DATE is null and LEAVEPORT_TRAVEL_END_DATE is null ))
    --    AND LEAVEPORT_TRAVEL_END_DATE >= leavePortTravelStartDate
        AND ((PUTPORT_TRAVEL_END_DATE >= leavePortTravelEndDate AND PUTPORT_TRAVEL_START_DATE <= leavePortTravelEndDate) OR (PUTPORT_TRAVEL_END_DATE is null and PUTPORT_TRAVEL_START_DATE is null))
    --    AND PUTPORT_TRAVEL_START_DATE <= leavePortTravelEndDate
        AND leavePortTravelStartDate >= TRAVEL_START_DATE
        AND leavePortTravelEndDate <= TRAVEL_END_DATE
        AND (INLAND_LIMITED_FLIGHTS LIKE '%'||fltNum_addOn_In||'%'  or INLAND_LIMITED_FLIGHTS is null)
        AND (INTERNATIONAL_LIMITED_FLIGHTS LIKE '%'||fltNum_addOn_Out||'%' or INTERNATIONAL_LIMITED_FLIGHTS is null)
     --   AND ( INLAND_LIMITED_FLIGHTS is not null or INTERNATIONAL_LIMITED_FLIGHTS is not null)
      GROUP BY 
         OW_PRICE,
         PUTPORT_TRAVEL_START_DATE,
         PUTPORT_TRAVEL_END_DATE,
         LEAVEPORT_TRAVEL_START_DATE,
         LEAVEPORT_TRAVEL_END_DATE,
         INTERNATIONAL_LIMITED_FLIGHTS,
         INLAND_LIMITED_FLIGHTS,
         UPDATE_TIME
        ORDER BY
          UPDATE_TIME DESC,
          INTERNATIONAL_LIMITED_FLIGHTS nulls last,
          INLAND_LIMITED_FLIGHTS nulls last,
          OW_PRICE asc,
          LEAVEPORT_TRAVEL_START_DATE nulls last,
          LEAVEPORT_TRAVEL_END_DATE nulls last,
          PUTPORT_TRAVEL_START_DATE nulls last,
          PUTPORT_TRAVEL_END_DATE nulls last
          
        ) t
       ) 
        n where ROWNUM = 1;
   out_ow_price := POW_PRICE;
 EXCEPTION
  WHEN NO_DATA_FOUND THEN
  out_ow_price := 0;
  dbms_output.put_line('没有XXXX的数据');


end;

4.java代码调用存储过程

		Session openSession = this.getHibernateTemplate().getSessionFactory().openSession();
		Connection conn = null;
		CallableStatement call = null;
		Double addonPrice = 0d;
		//String sql = "{?=call queryAddOnPrice(?,?,?,?,?,?,?,?)}";
		String hql =  "{call queryAddOnPrice(?,?,?,?,?,?,?,?,?)}";
		try {
			conn = openSession.connection();
			call = conn.prepareCall(hql);
			// out 参数 声明
			call.registerOutParameter(1, OracleTypes.NUMBER);
			call.setString(2, voyage);   // in  参数 赋值    
			call.setString(3, airportlines);
			call.setString(4, transfers);
			call.setString(5, leavePortTravelStartDate);
			call.setString(6, leavePortTravelEndDate);
			call.setString(7, cabin);
			call.setString(8, fltNum_addOn_In);
			call.setString(9, fltNum_addOn_Out);
			
			call.execute(); // 执行
			
			 addonPrice = call.getDouble(1); // 取出结果
			 log.info("通过存储过程   国内ADDON价格费用为:" + addonPrice );
		} catch (Exception e) {
			log.error("通过存储过程   国内ADDON价格费用出错!");
			e.printStackTrace();
		}finally{
			WebUtil.release(call, conn, openSession);
		}