Question

我有一个带有spark的java项目，我希望它部署在Tomcat服务器上。我的问题是，在eclipse的Run on server期间，我收到了错误：

SEVERE: Exception starting filter SparkFilter
javax.servlet.ServletException: java.lang.ClassNotFoundException: com.myprojects.usermobility.main.UserMobilityMain
    at spark.servlet.SparkFilter.getApplication(SparkFilter.java:106)
    at spark.servlet.SparkFilter.getApplications(SparkFilter.java:131)
    at spark.servlet.SparkFilter.init(SparkFilter.java:66)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4700)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5340)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: com.myprojects.usermobility.main.UserMobilityMain
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at spark.servlet.SparkFilter.getApplication(SparkFilter.java:103)
    ... 14 more

我已经在其他服务器的spark-java教程中指定了一个web.xml文件。 web.xml中：

   <filter>
        <filter-name>SparkFilter</filter-name>
        <filter-class>spark.servlet.SparkFilter</filter-class>
        <init-param>
            <param-name>applicationClass</param-name>
            <param-value>com.myprojects.usermobility.main.UserMobilityMain</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>SparkFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

我还添加了java类中需要的东西。 UserMobilityMain.java：

package com.myprojects.usermobility.main;

import spark.Request;
import spark.Spark;
import spark.servlet.SparkApplication;

public class UserMobilityMain implements SparkApplication {  

    @Override
    public void init() { ... } // there are specified mappings
}

我试图在web.xml中只使用java类名，但它也没有用。我检查了war文件，在WEB-INF / class文件夹中有适当的.class文件。我正在使用Tomcat 8.0和Java 1.8。我还包括maven配置文件。 Pom.xml：

<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>UserMobilityWeb</groupId>
  <artifactId>UserMobilityWeb</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <build>
  <finalName>UserMobilityWeb</finalName>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.0</version>
      </plugin>
    </plugins>
  </build>
  <dependencies>
        <dependency>
            <groupId>com.sparkjava</groupId>
            <artifactId>spark-core</artifactId>
            <version>2.7.1</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20171018</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.9.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.39</version>
        </dependency>
    </dependencies>
</project>

此外，我尝试通过maven构建并将war文件移动到Tomcat服务器中的webapps文件夹，但它仍然在Tomcat日志文件中出现相同的错误。

编辑：我之前还有这个项目的war文件正在运行，但我需要对代码进行一些更改并构建新的。

Spark-java类未找到异常

0 个答案: