Three methods for importing external files on JSP pages

First:

Introduce the include command of JSP into external files

JSP code

1. <% @ Include file =
   "../Common/head. jsp"
   %>
   

<%@include file="../common/head.jsp"%>

Purpose: When page elements are loaded, external page elements are loaded together, which may affect the page loading efficiency.

Second:

Struts label Introduction

JSP code

1. <Div id =
   "Left"
   Class =
   "Book_left"
   >
   
2. <! -- Load content in category. jsp -->
3. <! -- <S: Action name = "Cate"
   Namespace =
   "/Main"
   Executeresult =
   "True"
   > </S: Action> -->
   
4. </Div>

<Div id = "Left" class = "book_left"> <! -- Load content in category. jsp --> <! -- <S: Action name = "Cate" namespace = "/main" executeresult = "true"> </S: Action> --> </div>

Purpose: when loading a page, go back and execute the corresponding action and return the corresponding information element.

Third

Asynchronous requests such as Ajax and jquery

JSP code

1. <SCRIPT type =
   "Text/JavaScript"
   >
   
2. $ ("# Left"
   ). Ajaxstart (function (){
   
3. $ (This). Text ("loading ...."
   );
   
4. });
5. $ ("# Left"
   ). Load (
   "../Main/Cate. Do"
   );
   
6. </SCRIPT>

<SCRIPT type = "text/JavaScript"> $ ("# Left "). ajaxstart (function () {$ (this ). text ("loading .... ") ;}); $ (" # Left "). load (".. /main/Cate. do "); </SCRIPT>

Purpose: Send an asynchronous request. When the page element is loaded, request the corresponding display content. The page and data are separated to implement asynchronous loading.