How to add pictures in java web

How to add pictures in java web

For java visual interface to insert background pictures, just background-image:url (picture path) is enough. For web projects, this is not the case.

<div class=&#39;ban&#39; style="height:100%;background-image:url(&#39;/img/qx.jpg&#39;)">

The effect is as follows:

We need to write Java code in the jsp page and let Java get the project information. Root path, introduce these image files through absolute paths. We need to write the following code at the beginning of the jsp file.

<%
String path = request.getContextPath();
String basePath=null;
basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
int port=request.getServerPort();
if(port==80){
    basePath=request.getScheme()+"://"+request.getServerName()+path;
}else{
    basePath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path;
}
request.setAttribute("basePath", basePath);
%>

These pieces of code just get the basic path, and request is one of the nine implicit objects of JSP that we often say. JSP is Servlet. request.setAttribute("basePath", basePath) means that you will get The basePath (project root path) is stored in the request scope, but we still cannot display the image here. We need to add this line of code $ in front of the image path. As follows:

<div class=&#39;ban&#39; style="height:100%;background-image:url(&#39;${basePath}/img/qx.jpg&#39;)">

(Related video tutorial sharing: java video tutorial)

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