使用java从sql server存储过程中检索返回值

Question

这是我的存储过程，它返回一个值。我需要调用此过程并将该返回值放入我的 java 程序中。

CREATE PROCEDURE my_procedure @advisor de , @adv_xml xml   

AS      


begin        
  declare 
    @psrg_idi idi,
    @adv_cd cd,
    @CurrDate cdt

  set @adv_cd = (select adv_cd from dbo.ADVICE_LK where upper(rtrim(adv_de)) = upper(@advisor))
  set @psrg_idi = 0    
  set @CurrDate = getdate()

    BEGIN TRY     
      exec my_proc_2 @CurrDate,@psrg_idi output

      insert into
          ADVICE
          (psrg_idi,
           adv_cd,
           psra_original_xml)  
      values
        (@psrg_idi,
         @adv_cd,
         @adv_xml)  

      select 
        @psrg_idi as psrg_idi

    END TRY     
    BEGIN CATCH    
       DECLARE @ErrorMessage NVARCHAR(4000);    
       DECLARE @ErrorSeverity INT;    
       DECLARE @ErrorState INT;     
       SELECT     
         @ErrorMessage = ERROR_MESSAGE(),    
    @ErrorSeverity = ERROR_SEVERITY(),    
    @ErrorState = ERROR_STATE();    
   -- Use RAISERROR inside the CATCH block to return error    
   -- information about the original error that caused    
   -- execution to jump to the CATCH block.    
   RAISERROR (@ErrorMessage, -- Message text.    
     @ErrorSeverity, -- Severity.    
     @ErrorState -- State.    
     );    
   return -1    
     END CATCH    

end

这是我如何尝试将此值放入上述存储过程返回的 java 程序中。当我从 java 调用此过程时，所有预期值都存储到数据库表中。但我收到返回值 groupId 为“0”.. 任何想法或帮助将不胜感激。

CallableStatement cs = con.prepareCall("{? = call my_procedure (?,?)}");                
int i = 0;
cs.registerOutParameter(++i, java.sql.Types.INTEGER);
cs.setString(++i, advisor);
cs.setString(++i, adviceXml);

cs.execute();
int groupId = cs.getInt(1);

我已经查看了已接受的答案/sf/answers/136396291/。我也在以同样的方式尝试，但不知何故无法获得返回值

Answer 1

请参阅此处接受的答案。

首先，您应该决定您的 SP 是否会返回 ResultSet。我的意思是，当您发现错误时，您会这样做RETURN -1。但是，如果一切正常，您执行 a SELECT，它返回一个 ResultSet。

说，如果你选择返回一个值，你必须这样做：

CallableStatement cs = con.prepareCall("{? = call my_procedure (?,?)}");                
int i = 0;
cs.registerOutParameter(++i, java.sql.Types.INTEGER);
cs.setString(++i, advisor);
cs.setString(++i, adviceXml);

cs.execute();
int groupId = cs.getInt(1);

但是，如果您返回 ResultSet，则必须执行以下操作：

CallableStatement cs = con.prepareCall("{call my_procedure (?,?)}");                
int i = 0;
cs.setString(++i, advisor);
cs.setString(++i, adviceXml);

ResultSet rs = cs.executeQuery();
if (rs.next())
    int groupId = rs.getInt(1);

我已经使用玩具 SP 测试了这两种方法：

CREATE PROCEDURE my_procedure @v1 int, @v2 int 
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

    --SELECT @v1 + @v2 as sumVal -- Comment this and uncomment previous line to test Return
RETURN @v1+@v2 -- Comment this and uncomment previous line to test ResultSet
END