java.lang.AbstractMethodError：javax.servlet.jsp.JspFactory.getJspApplicationContext（Ljavax / servlet / ServletContext;）

Question

java.lang.AbstractMethodError：javax.servlet.jsp.JspFactory.getJspApplicationContext（Ljavax / servlet / ServletContext;）Ljavax / servlet / jsp / JspApplicationContext;

嗨，我正在用vaadin开发Web服务器。 我的应用程序运行良好，但是现在启动它时，出现以下错误

java.lang.AbstractMethodError: javax.servlet.jsp.JspFactory.getJspApplicationContext(Ljavax/servlet/ServletContext;)Ljavax/servlet/jsp/JspApplicationContext;
at org.apache.jasper.compiler.Validator$ValidateVisitor.<init>(Validator.java:515) ~[jasper.jar:7.0.55]
at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1845) ~[jasper.jar:7.0.55]
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:217) ~[jasper.jar:7.0.55]
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373) ~[jasper.jar:7.0.55]
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353) ~[jasper.jar:7.0.55]
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340) ~[jasper.jar:7.0.55]
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657) ~[jasper.jar:7.0.55]
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357) ~[jasper.jar:7.0.55]
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) ~[jasper.jar:7.0.55]
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) ~[jasper.jar:7.0.55]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) ~[servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) ~[catalina.jar:7.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) ~[catalina.jar:7.0.55]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) ~[catalina.jar:7.0.55]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.55]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) [catalina.jar:7.0.55]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.55]
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:312) [catalina.jar:7.0.55]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.55]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [catalina.jar:7.0.55]
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) [tomcat-coyote.jar:7.0.55]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) [tomcat-coyote.jar:7.0.55]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1736) [tomcat-coyote.jar:7.0.55]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1695) [tomcat-coyote.jar:7.0.55]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_25]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_25]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.55]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_25]

对于依赖关系，我正在使用maven，而pom是

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>ContestiOpenDataJungle</groupId>
<artifactId>ContestiOpenDataJungle</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.2.5.RELEASE</version>
</parent>

<properties>
    <vaadin.version>7.4.4</vaadin.version>
    <java.version>1.7</java.version>
    <tomcat.version>7.0.59</tomcat.version>
</properties>

<repositories>
    <repository>
        <id>eXo-pub-repo</id>
        <name>eXoPlatform public repo</name>
        <url>http://repository.exoplatform.org/public</url>
    </repository>

    <repository>
        <id>vaadin-addons</id>
        <url>http://maven.vaadin.com/vaadin-addons</url>
    </repository>
</repositories>

<dependencies>
    <!-- The core server part of Vaadin -->
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-server</artifactId>
        <version>${vaadin.version}</version>
    </dependency>

    <!-- Vaadin themes -->
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-themes</artifactId>
        <version>${vaadin.version}</version>
    </dependency>

    <!-- Push support -->
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-push</artifactId>
        <version>${vaadin.version}</version>
    </dependency>
    <!-- Precompiled DefaultWidgetSet -->
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-client-compiled</artifactId>
        <version>${vaadin.version}</version>
    </dependency>

    <!-- Compiler for custom widget sets. Should not be deployed -->
    <!-- <dependency> -->
    <!-- <groupId>com.vaadin</groupId> -->
    <!-- <artifactId>vaadin-client-compiler</artifactId> -->
    <!-- <version>${vaadin.version}</version> -->
    <!-- </dependency> -->

    <!-- Vaadin client side, needed for widget set compilation -->
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-client</artifactId>
        <version>${vaadin.version}</version>
        <exclusions>
            <exclusion>
                <artifactId>validation-api</artifactId>
                <groupId>javax.validation</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!-- Compiler for custom widget sets. Should not be deployed -->
    <dependency>
        <groupId>org.exoplatform.core</groupId>
        <artifactId>exo.core.component.security.core</artifactId>
        <version>2.5.12-GA</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.1.0.Final</version>
    </dependency>

    <dependency>
        <groupId>groupId</groupId>
        <artifactId>artifactId</artifactId>
        <version>1.0</version>
        <scope>system</scope>
        <systemPath>${basedir}/WebContent/WEB-INF/lib/TagCloud.jar</systemPath>
    </dependency>

    <dependency>
        <groupId>eu.exeura</groupId>
        <artifactId>DBSQLContesti2</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>


    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-spring-boot</artifactId>
        <version>1.0.0.beta2</version>
    </dependency>

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

    <dependency>
        <groupId>ru.xpoft.vaadin</groupId>
        <artifactId>spring-vaadin-integration</artifactId>
        <version>3.1</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc-portlet</artifactId>
    </dependency>

    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-spring</artifactId>
        <version>1.0.0.beta1</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-server</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-shared</artifactId>
            </exclusion>
        </exclusions>
    </dependency>


    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
    </dependency>

</dependencies>

<build>
    <sourceDirectory>src</sourceDirectory>
    <testSourceDirectory>test</testSourceDirectory>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>${java.version}</source>
                <target>${java.version}</target>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <configuration>
                <warName>ContestiOpenDataJungle</warName>
                <warSourceDirectory>WebContent</warSourceDirectory>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>
    </plugins>
</build>

该服务器是Tomcat 7.0.59版。 Java版本是1.7。 我发现错误可能是针对以下罐子的：

servlet.jar
servlet-api.jar
j2ee.jar

因为它们具有文件javax.servlet，但我没有。 https://community.oracle.com/thread/1397338?start=0

谢谢您的帮助

Answer 1

您缺少项目中的以下依赖项：

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
    <version>7.0.59</version>
</dependency>

Answer 2

包含org.apache.jasper.compiler.Validator的库期望将其作为获得的javax.servlet.jsp.JspFactory实现的类定义之间，可能存在版本问题。

对于类，让3个jar具有相同的二进制名称不是一个好习惯。 除非您知道类加载器将选择哪个类，否则您将无法了解其行为。 减少罐子的数量，使其仅包含您需要的罐子。

如果这样仍然有冲突，请检查包含org.apache.jasper.compiler.Validator的库的依赖关系树，并确保可用的javax.servlet.jsp.JspFactory实现实现了在依赖关系树中找到的接口规范。

发生的事情是这样的：

-- my-framework-1.0.0 --
interface A {
  method b ();
}

class AFactory {
  A getDefault () { ... }

-- my-framework-2.0.0 --
interface A {
  method b(String s);
}

class AFactory {
  A getDefault () { ... }

-- my-implementation --
class B {
  public void act () {
    AFactory.getDefault().b();
  }
}

只要使用my-framework-1.0.0进行部署，此方法就可以正常工作。 使用my-frameworke-2.0.0进行部署将使其中断。

如果IDE的类加载器选择my-framework-1.0.0进行编译，但打包程序选择my-frameworke-2.0.0，则您可能不会在IDE中看到此问题。