今天也碰到了el表达式无法解析的事情,于是在网上查询了下,大多说是因为web.xml中声明的版本问题
于是收集了如下版本:
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web-app_2_2.xsd
<?xml version= "1.0" encoding= "UTF-8" ?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/dtd/web-app_2_2.dtd" >
<?xml version= "1.0" encoding= "UTF-8" ?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/dtd/web-app_2_2.dtd" >
web-app_2_3.xsd
<?xml version= "1.0" encoding= "UTF-8" ?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
<?xml version= "1.0" encoding= "UTF-8" ?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
web-app_2_4.xsd
<?xml version= "1.0" encoding= "UTF-8" ?>
<web-app xmlns= "http://java.sun.com/xml/ns/j2ee" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" version= "2.4" xsi:schemaLocation= "http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >
<?xml version= "1.0" encoding= "UTF-8" ?> <web-app xmlns= "http://java.sun.com/xml/ns/j2ee" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" version= "2.4" xsi:schemaLocation= "http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >
web-app_2_5.xsd
<?xml version= "1.0" encoding= "UTF-8" ?>
<web-app xmlns= "http://java.sun.com/xml/ns/javaee" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" version= "2.5" xsi:schemaLocation= "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" >
<?xml version= "1.0" encoding= "UTF-8" ?> <web-app xmlns= "http://java.sun.com/xml/ns/javaee" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" version= "2.5" xsi:schemaLocation= "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" >
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一一试了一下,还是不行。最后发现,在JSP的声明(<%@page %>)部分加一行,如下:
<%@ page isELIgnored="false" %>
这样设为false才能解析EL表达式。
以上这篇浅谈java里的EL表达式在JSP中不能解析的问题就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。