java - ClassNotFoundException : javax. servlet.jsp.JspFactory

Question

我有一个基于 Maven 的应用程序，我完全复制了它并尝试运行 mvn jetty:run

现在出现此错误:

Caused by: java.lang.ClassNotFoundException: javax.servlet.jsp.JspFactory
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
    ... 47 more

奇怪的是，在另一台机器上运行的项目的副本完全相同。

以下是完整的依赖关系:
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-6.0</artifactId>
<version>1.0.0.Final</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.8</version>
</dependency>
<dependency>
<groupId>io.fastjson</groupId>
<artifactId>boon</artifactId>
<version>0.30</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client</artifactId>
<version>1.21.0</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-gson</artifactId>
<version>1.21.0</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-jackson2</artifactId>
<version>1.21.0</version>
</dependency>
<dependency>
<groupId>com.google.inject</groupId>
<artifactId>guice</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>com.google.inject.extensions</groupId>
<artifactId>guice-servlet</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet</artifactId>
<version>${version.restlet}</version>
</dependency>
<!--<dependency>-->
<!--<groupId>org.restlet.jee</groupId>-->
<!--<artifactId>org.restlet.ext.jee</artifactId>-->
<!--<version>${version.restlet}</version>-->
<!--</dependency>-->
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.fileupload</artifactId>
<version>${version.restlet}</version>
</dependency>
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.servlet</artifactId>
<version>${version.restlet}</version>
</dependency>
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.swagger</artifactId>
<version>${version.restlet}</version>
<exclusions>
<exclusion>
<groupId>org.raml</groupId>
<artifactId>raml-parser</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.xstream</artifactId>
<version>${version.restlet}</version>
</dependency>
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.json</artifactId>
<version>${version.restlet}</version>
</dependency>
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>org.mindrot</groupId>
<artifactId>jbcrypt</artifactId>
<version>0.3m</version>
</dependency>
<dependency>
<groupId>com.carlosbecker</groupId>
<artifactId>guice-junit-test-runner</artifactId>
<version>1.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.xodus</groupId>
<artifactId>xodus-openAPI</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.jetbrains.xodus</groupId>
<artifactId>xodus-environment</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.jetbrains.xodus</groupId>
<artifactId>xodus-entity-store</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<!-- Testing -->
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-appengine</artifactId>
<version>1.19.0</version>
</dependency>
<!-- Test Data -->
<dependency>
<groupId>org.fluttercode.datafactory</groupId>
<artifactId>datafactory</artifactId>
<version>0.8</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>


Answer 1

原因是 servlet-api Artifact 中不存在 javax.servlet.jsp.JspFactory 类。它存在于 jsp-api Artifact 中。我炸开了 2 个 jar ，结果如下:

根据需要的版本添加jsp-api依赖，例如:

<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.0</version>
    <scope>provided</scope>
</dependency>