表更新没有发生

Question

以下是代码：

PreparedStatement preparedStatement = conn.prepareStatement("update DateDeletion set DeletionDate= ? ,userName= ? where LedgerName='MiscelleniousExpenses'");
            preparedStatement.setString(1,Deletiondate);
            preparedStatement.setString(2,userName);
            //preparedStatement.setTimestamp(3,null);
            //preparedStatement.setString(4,"MiscelleniousExpenses");
            System.out.println("date :"+Deletiondate+"username :"+userName+"ts :"+timeStamp);
            int rowsUpdated= preparedStatement.executeUpdate();//for insert statement
            System.out.println(rowsUpdated);
            conn.close();
            if(rowsUpdated>0){
                System.out.println ("Ok."); 
                //ExpenditureMasterBeanInit();
                return "updated";
            }

当我检查时，

rowsupdated给0行更新..... '从Datedeletion中选择Deletiondate，其中LedgerName ='MiscelleniousExpenses'; 它给了我一个可能出错的价值？

Answer 1

我已插入记录但未提交。这就是为什么数据不会在jsf页面中使用JDBC。我多么傻到。