Unsupported method: ResultSet.last 错误

解决办法： 注意其中的

java.sql.ResultSet.TYPE_SCROLL_SENSITIVE,    java.sql.ResultSet.CONCUR_READ_ONLY

public void prepareStatement(String strSql){
         try{
             prepstmt = this.conn.prepareStatement(strSql,java.sql.ResultSet.TYPE_SCROLL_SENSITIVE,
                     java.sql.ResultSet.CONCUR_READ_ONLY);
         }
         catch(Exception e){
             e.printStackTrace(System.out);
             Debug.writeLog("In prepareStatement(String strSql), Exception Occured ! Info :" + e.getLocalizedMessage());
         }
    }




public ResultSet executeQuery(String strSql) {
         ResultSet rs=null;
         try{
             strSql=new String(strSql.getBytes("GBK"),"ISO8859_1");
             Statement stmt = this.conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
                     java.sql.ResultSet.CONCUR_READ_ONLY);
             rs = stmt.executeQuery(strSql);
         }
         catch(Exception e){
             e.printStackTrace(System.out);
             Debug.writeLog("In executeQuery(String), Exception Occured ! Info :" + e.getLocalizedMessage());
         }
         return rs;
     }