避免Jsp中的Scriptlet在页面加载时显示数据
我意识到，当你在jsp中提交表单时，在映射的servlet中可以获得所需的数据，将其设置在合适的范围内（比如request），并将其转发给jsp，如下所示：
I realize that when you submit the form in a jsp, in the mapped servlet you can get the desired data, set it in the proper scope(say request) and forward it to jsp like this:
request.setAttribute("myList", myList); // Store list in request scope.
request.getRequestDispatcher("/index.jsp").forward(request, response);
然而，我想知道没有窗体或换句话说我们想显示数据的页面只要页面加载，我们如何有效地加载数据，而不使用scriptlet，比如
However am wondering for pages which doesn't have a form or in other words we want to display data as soon as page loads, how can we efficiently load the data without using scriptlets like
<%= myBean.populateData("String Argument_1")%>
非常感谢任何人都可以提供任何建议。
Would highly appreciate if anyone can provide any recommendations around the same.
请求来自表单的事实不会改变任何内容。 servlet接收到一个请求，然后可以执行一些处理并转发到JSP：
The fact that the request comes from a form or not doesn't change anything. The servlet receives a request, and then can do some processing and forward to a JSP:
- servlet获取请求参数
- servlets使用这些参数从数据库中获取请求的数据，并用所述数据填充一些bean。它还可以从头开始构建一些bean，以显示具有默认值的表单
- servlet将这些bean放入请求属性中
- servlet转发到JSP
- JSP避免使用scriptlet，而是使用JSP EL，JSTL和自定义标签来显示存储在请求范围中的bean中的信息。
- servlet gets request parameters
- servlets uses those parameters to get requested data from a database, and populate some beans with said data. It may also build some beans from scratch, to display a form with default values
- servlet puts those beans in request attributes
- servlet forwards to a JSP
- JSP avoids using scriptlets and rather uses JSP EL, the JSTL and custom tags to display the information stored in the beans in request scope