Oracle package 定義和java調用

1.定義package和package body

create or replace package pkg_bicycle_test

is
  PROCEDURE pro_fetchuser(ret out sys_refcursor, strId in out varchar2);
end;

create or replace package body pkg_bicycle_test
is
 g_var1 varchar2(32);

 PROCEDURE pro_fetchuser(ret out sys_refcursor,strId in out varchar2)
 as
 begin
   open ret for
   select * from t_user;
   g_var1 :=strId;
   dbms_output.put_line(g_var1);
   strId := 'haha';
 end;
 
 end;

2.java調用

Connection conn = session.connection();
            CallableStatement call = conn.prepareCall("{call pkg_bicycle_test.pro_fetchuser(?,?)}");
            call.registerOutParameter(1, -10);
            call.setString(2, "wzw");
            call.registerOutParameter(2, java.sql.Types.VARCHAR);
            
            call.executeQuery();
            ResultSet rs = (ResultSet) call.getObject(1);
            String strId = call.getString(2);
            System.out.println("========: " + strId);
            ResultSetMetaData md = rs.getMetaData();
            int count = md.getColumnCount();
            List<String> columns = new ArrayList<String>();
            for (int i=1; i<=count; i++)
            {  
                columns.add(md.getColumnName(i));
                System.out.println("列名：　" + md.getColumnName(i));
            }
            
            while(rs.next())
            {
                for (String col:columns)
                {
                    System.out.print(rs.getObject(col)+"  ");
                }
                System.out.println();
            }