woshidaniu的专栏

Statement stmt1=conn.createStatement();  ResultSet rsYiyuan=stmt1.executeQuery("select * from 要重复使用一定要再申请statement 要不然就是一个坑啊

$("#btnSelectAll").click(function(){var n=;//就在 这里for(var i=1;i{var str="ck_"+i;var ckx=document.getElementById(str);ckx.checked=true;}})

从数据库中获取的时间数据格式不一定符合需要，可根据下面的代码进行修改SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd hh:mm");  Date date=format.parse(fabingshijian);  fabingshijian=format.format(date);

onchange="textToFloat(this.id)" 这个是 input  text的function textToFloat(x){var y=document.getElementById(x).value;var fy1=parseFloat(y);document.getElementById(x).value=fy1;}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubresponse.setHeader("Access-Control-Allow-Orig

Server Tomcat v9.0 Server at localhost failed to start.he servlets named [x] and [x.y] are both mapped to the url-pattern [/x] which is not permitted这个神奇的问题，搞了一晚上才想起来，在等标号前面要加上web:结果

之前用$getElementId('xxx').value=0;  结果发现在firefox这些浏览器上是无效的还得用下面的$getElementId('xxx').setAttribute('value',0);