• Output (similar to print)
< % = % >Copy the code
  • Adding script snippets (that is, Java code)
The < %int sum=0;
        for (int i = 0; i <100 ; i++) {
            sum=sum+1;
        }
    out.println("<h1>"+sum+"</h1>"); % >Copy the code
  • Embed HTML (in short, anything that is part of Java code needs <% %>, such asThe < %} % >)
The < %for (int i = 0; i < 5; i++){
%>
    <h1> hello </h1>
<%
    }
%>
Copy the code
  • Configure the error page in web.xml
<error-page>
    <error-code>404</error-code><! -- Error code 404 500,,,,, --> 
    <location>/error.jsp</location><! The error is the location of the JSP page that needs to be opened.
</error-page>
Copy the code
  • Import other JSP pages
<jsp:include page="index.jsp"></ JSP :include> <h1>Copy the code