java.lang.ClassNotFoundException:org.apache.jsp.index_jsp [英] java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

问题描述

我有一个旧的struts 1应用程序，该应用程序始终使用Ant构建，而我正在转换为使用Maven.我的应用程序的结构是模块化的，在包含的模块中具有依赖项管理.包含模块的dep mgmt部分包含:

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>

构建战争(我从包含的模块运行package Maven作业)并从intelliJ运行具有该战争的Tomcat配置时，我在浏览器中看到以下内容:

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:

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)

我从搜索中发现的所有内容都表明，原因是javax.servlet jars中的版本冲突，但是我的WEB-INF/lib目录中根本没有任何内容.我试过使用provided，compile甚至install/pom的范围，但是它们没有任何帮助.

Everything I can find from searching on this suggests the cause is a version conflict in javax.servlet jars, but there is nothing in my WEB-INF/lib directory at all. I have tried using scope of provided, compile, and even install/pom, but those don't do anything helpful.

tomcat日志中没有其他内容.

There is nothing additional in the tomcat logs.

我确认正在编译jsps.我正在使用jspc-maven-plugin.

I confirmed that the jsps are being compiled. I am using jspc-maven-plugin.

在我的子模块(而不是包含子模块)的pom.xml中，我有:

In my sub-module's (not the containing one's) pom.xml, I have:

<build>
    <!-- default goal to run if somebody doesn't pick one (rarely matters) -->
    <defaultGoal>install</defaultGoal>

    <!-- resources and filtering - also see configuration under maven-war-plugin below -->
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
        </resource>
    </resources>
    <filters>
        <filter>src/main/resources/${env}.properties</filter>
        <filter>src/main/resources/${env}.tokens</filter>
    </filters>

    <plugins>
        <!-- begin - precompiling jsps -->
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>jspc-maven-plugin</artifactId>
            <executions>
                <execution>
                    <id>jspc</id>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                    <configuration>
                        <warSourceDirectory>${basedir}/src/main/webroot</warSourceDirectory>
                        <inputWebXml>${basedir}/src/main/webroot/WEB-INF/web.xml</inputWebXml>
                        <!--<workingDirectory>${basedir}/src/main/webroot</workingDirectory>-->
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <!-- end - precompiling jsps -->

        <!-- used to build warfiles -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.0</version>
            <configuration>
                <webResources>
                    <resource>
                        <directory>${pom.basedir}/src/main/webroot</directory>
                        <filtering>true</filtering>
                        <!--<targetPath>WEB-INF</targetPath>-->
                    </resource>
                </webResources>
            </configuration>
        </plugin>
    </plugins>
</build>

我可以在Maven构建输出中看到正在编译jsps.但是我仍然收到JasperException.

I can see in the maven build output that the jsps are being compiled. But I still get the JasperException.

推荐答案

自从我发布这篇文章已有一段时间了，但我想我应该展示出自己的想法(就我现在所记得的一样).

It's been a while since I posted this, but I thought I would show how I figured it out (as best as I recall now).

我做了一个Maven依赖树来查找依赖关系冲突，并删除了所有依赖关系中的排除冲突，例如:

I did a Maven dependency tree to find dependency conflicts, and I removed all conflicts with exclusions in dependencies, e.g.:

<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging-api</artifactId>
    <version>1.1</version>
    <exclusions>
        <exclusion>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
        </exclusion>
    </exclusions>
</dependency>

此外，我将provided范围用于javax.servlet依赖项，以免在运行该应用程序时与Tomcat提供的内容产生其他冲突.

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>

HTH.

这篇关于java.lang.ClassNotFoundException:org.apache.jsp.index_jsp的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！