JSP cannot parse El expression solution _jsp programming

The reason: By default, Servlet 2.4/jsp 2.0 supports EL expressions.

There are two ways to solve this problem:

1. Modify the opening definition of the web.xml.

Copy Code code as follows:

<web-app version= "2.4"
Xmlns= "HTTP://JAVA.SUN.COM/XML/NS/J2EE"
Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"
xsi:schemalocation= "Http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >

This configuration represents the Servlet 2.4/jsp 2.0.

2. Add a code to the beginning of a page that uses an EL expression.

Copy Code code as follows:

<%@ page iselignored= "false"%>

However, at present, I have only tried the second method, and if there are other methods, please do not hesitate to enlighten the readers.