Statement µÄ execute(sql) ·½·¨µÄ·µ»ØÖµ

Statement µÄ  execute(sql) ·½·¨µÄ·µ»ØÖµ
 true   if   the   first   result   is   a   ResultSet   object;  
 
 false   if   it   is   an   update   count   or   there   are   no   resultsTop
//  Èç¹û executeµÄ·µ»ØÖµÊÇ ResultSetÔò·µ»Ø true
  boolean   sta=stmt.execute(sql);   
  if(sta){ // ·µ»ØÖµÊÇ ResultSet
        ResultSet   rs=stmt.getResultSet();   
        ..............
  }
  else{// 
        int   x=stmt.getUpdateCount();
        ............
  }