jstl标签问题

最新推荐文章于 2026-01-07 11:38:48 发布

原创最新推荐文章于 2026-01-07 11:38:48 发布 · 180 阅读

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本文介绍了一项从Ant构建工具迁移至Maven构建工具的任务，在此过程中遇到了`java.lang.ClassNotFoundException`错误。该错误发生在尝试加载特定JSP文件时，并提供了详细的堆栈跟踪信息。文中还展示了如何配置依赖项管理，以避免与Tomcat提供的依赖项发生冲突。

[color=blue][b]java.lang.ClassNotFoundException: org.apache.jsp.index_jsp[/b][/color]

I have an old struts 1 app that has always been built using Ant, which I'm converting to use Maven instead. The structure of my app is modular, with dependency management in the containing module. The containing module's dep mgmt section contains:

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        ...
    </dependencies>
</dependencyManagement>

When I build the war (I run the package Maven job from the containing module) and run a Tomcat configuration with that war from intelliJ, I see the following in my browser:
[quote]org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:161)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause
org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:630)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:149)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
java.net.URLClassLoader$1.run(URLClassLoader.java:202)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:190)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:134)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:66)
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:628)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:149)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)[/quote]

Also, I used the provided scope for javax.servlet dependencies so as not to introduce an additional conflict with what is provided by Tomcat when I run the app.

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.1</version>
    <scope>provided</scope>
</dependency>

参考：http://stackoverflow.com/questions/19963052/java-lang-classnotfoundexception-org-apache-jsp-index-jsp

[color=blue][b]The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application[/b][/color]

参考：http://bbs.youkuaiyun.com/topics/270025614

JSP 标准标签库（JSTL）:http://www.runoob.com/jsp/jsp-jstl.html