java call stored procedure

1. Call a stored procedure that returns a result set: a stored procedure that returns results by calling "Execute SQL Statement"

Take a recently used business as an example. The basic business is like this: Find all suppliers that have both equipment A and equipment B.

Stored procedure:

--exec getSupplierInfo2 12, 'distribution monitoring and control terminal'; test one
--exec getSupplierInfo2 12, 'AC10kV power cable'; test two
CREATE PROCEDURE [dbo].[getSupplierInfo2]
	@itemID int,--item number
	@deviceType varchar(100)--device type
AS
BEGIN
	SET NOCOUNT ON;
	declare @count int;--the number of models
	declare @sql nvarchar(max)	

	--1. Obtain the number of equipment codes according to the item serial number and equipment category, and see how many models the supplier needs to meet
	select @count = count(distinct(field6)) from table7 where field2=@itemID and field7=@deviceType and field6 is not null;
	--print @count;
	if(@count<=0)--indicates that there is no qualified
	begin
		set @sql='select 0';
	end
	else
	begin
		if(@count=1)--There is only one kind, so you can query directly
		begin	
			set @sql = 'select distinct field9 from v_table14 where field2=(select top 1 field6 from table7 where field2='+cast(@itemID as varchar(20))+' and field7='''+@deviceType+''' and field6 is not null)';
		end
		else
		begin--indicates that there are many kinds, then one kind of loop
			declare @c int;--cycle use
			set @c = 1;		
			set @sql='';
			while(@c < = @count)
			begin
				declare @field6 varchar(200);--device encoding
				--2, get the device code
				select @field6 = field6 from (
					select distinct field6,row_number() over(order by field1) as fn from table7 where field2=@itemID and field7=@deviceType and field6 is not null ) as a
				where fn=@c;
				--print 'Device code: '+@field6;

				--3. Obtain the serial number of the supplier
				set @sql=@sql+' INTERSECT select distinct field9 from v_table14 where field2='''+@field6+'''';				
				set @c = @c+1;
			end
			set @sql = substring(@sql,12,len(@sql));					
		end
	end
	--print @sql;
	exec(@sql)
   
END

java code call:

/**
 * This method is used to obtain the serial number of qualified suppliers
 * @param itemID: item number
 * @param devicesType: device type
 * @return Object: 0-No qualified supplier data null-If there is an exception, you can check it through the log file String: Supplier serial number string, separated by commas
 * **/
public Object getSuppliers(int itemID,String devicesType){
	StringBuffer sql = new StringBuffer();
	CachedRowSetImpl rs = null;
	String result = "";
	try{
		//Get the supplier serial number that meets the conditions
		sql.append("DECLARE @return_value int;EXEC @return_value = [dbo].[getSupplierInfo2] @itemID="+itemID+",@deviceType='"+devicesType+"';");
//			System.out.println("DECLARE @return_value int;EXEC @return_value = [dbo].[getSupplierInfo2] @itemID="+itemID+",@deviceType='"+devicesType+"';");
		rs = dbTools.execQuery(sql.toString());
		StringBuffer suppliers = new StringBuffer();
		while(rs.next()){
			suppliers.append(","+rs.getInt(1));
		}
		if(suppliers.length()>1)result = suppliers.substring(1);
		writeLoggerForSQL("Get supplier serial number information (device type: "+devicesType+" program serial number: "+itemID+")", sql.toString(),result);
	}catch(Exception e){
		writeLoggerForException("Get supplier serial number information (device type: "+devicesType+" program serial number: "+itemID+")", sql.toString(), e);
		e.printStackTrace ();
		return null;
	}finally{
		utils.closeCachedRowSet(rs);
	}
	return result;
}
/**
 * This method is used to execute query sql: use CachedRowSetImpl to query
 * @param sql: the sql to execute the query
 * @return CachedRowSetImpl: result set
 * */
public static CachedRowSetImpl execQuery(String sql){
	Connection conn=null;
	PreparedStatement pst=null;
	ResultSet rs = null;
	CachedRowSetImpl rowset = null;
	try{
		conn = com.tzj.hl.db.HlBaseDao.getConn();
		if(conn!=null){
			pst = conn.prepareStatement(sql);
			rowset=new CachedRowSetImpl();
			rowset.populate(pst.executeQuery());
		}
	}catch(Exception e){
		e.printStackTrace ();
		return null;
	}finally{
		com.tzj.hl.db.HlBaseDao.closeConn(rs,pst,conn);
	}
	return rowset;
}

2. Call a stored procedure that does not return a result

Stored procedure:

CREATE PROCEDURE [dbo].[setSupplier]
	@programID int,--program number, primary key number of table6
	@supplierID int -- the service design unit serial number, the primary key serial number of table18	
AS
BEGIN	
	SET NOCOUNT ON;    
	--1, get the identification value
	declare @field40 int ;--Identifies the value
	select @field40 = field40 from table6 where field1=@programID;
	if(@field40=0)--is 0, then it needs to be modified
	begin
		--Get the maximum identification value of all eligible scheme numbers under the frame selection list number where the current scheme is located
		select @field40 = max(field40)+1 from table6 where field41=(select top 1 field41 from table6 where field1=@programID)
	end
	declare @supplierName varchar(200);--Service Design Manufacturer
	declare @pay decimal(16,2);	
	select @supplierName = field4,@pay=field11 from table_cfb_pj_unit_info_view where field1=@supplierID;
	update table6 set field29=getDate(),field27=@supplierID,field28=@supplierName,field40 = @field40,field36=@pay
	where field1=@programID;
END

java code call:

/**
 * This method is used to execute the stored procedure
 * @param programID: program number
 * @param supplierID: Design unit serial number
 * **/
public static int execCallableQuery(int programID,int supplierID){
	Connection conn=null;
	CallableStatement  callStmt =null;
	int result=0;
	try{
		conn = com.tzj.hl.db.HlBaseDao.getConn();
		if(conn!=null){
			callStmt  = conn.prepareCall("{call setSupplier(?,?)}");
			callStmt.setInt(1,programID);
			callStmt.setInt(2,supplierID);
			callStmt.execute();//Execute
			result = 1;
		}
	}catch(Exception e){
		e.printStackTrace ();
		result = 0;
	}finally{
		com.tzj.hl.db.HlBaseDao.closeConn(null,callStmt,conn);
	}
	return result;
}