Question

我尝试按照Neo4J文档使用neo4j 1.9.4建立一个非常简单的J2EE项目。我创建了一个非常简单的类，目的是将一些数据加载到graphDB中：

    package neo4j;

    import java.io.FileNotFoundException;
    import java.util.HashMap;
    import java.util.Map;

    import org.neo4j.cypher.javacompat.ExecutionEngine;
    import org.neo4j.cypher.javacompat.ExecutionResult;
    import org.neo4j.graphdb.GraphDatabaseService;
    import org.neo4j.graphdb.Transaction;
    import org.neo4j.graphdb.factory.GraphDatabaseBuilder;
    import org.neo4j.graphdb.factory.GraphDatabaseFactory;
    import org.neo4j.graphdb.factory.GraphDatabaseSettings;

    public class DBLoader{
       private final String BDD_PATH = "http://localhost:7474/recipeFinderDB";

       public void feedDB() {
        GraphDatabaseBuilder dbBuilder = new GraphDatabaseFactory()
          .newEmbeddedDatabaseBuilder(BDD_PATH);
        GraphDatabaseService db = dbBuilder.newGraphDatabase();

       db.shutdown();
    }

然后我在一个简单的jsp文件中实例化这个类。

但每当我想运行我的项目时，我都会收到以下错误：

SEVERE：带有路径[/ RecipeFinder]的上下文中servlet [jsp]的Servlet.service（）抛出异常[在第14行处理JSP页面/index.jsp时发生异常 Stacktrace：]有根本原因 java.lang.ClassNotFoundException：org.neo4j.graphdb.factory.GraphDatabaseFactory 在org.apache.catalina.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1676）在org.apache.catalina.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1521）在neo4j.DBLoader.feedDB（DBLoader.java:20）在org.apache.jsp.index_jsp._jspService（index_jsp.java:68）在org.apache.jasper.runtime.HttpJspBase.service（HttpJspBase.java:70）在javax.servlet.http.HttpServlet.service（HttpServlet.java:722）在org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:419）在org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:391）在org.apache.jasper.servlet.JspServlet.service（JspServlet.java:334）在javax.servlet.http.HttpServlet.service（HttpServlet.java:722）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:304）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:240）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:164）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:462）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:164） at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:100）在org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:562）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:395）在org.apache.coyote.http11.Http11Processor.process（Http11Processor.java:250）在org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process（Http11Protocol.java:188） at org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:302） at java.util.concurrent.ThreadPoolExecutor.runWorker（Unknown Source） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（Unknown Source）在java.lang.Thread.run（未知来源）

这个类来自neo4j-jernel-1.9.4.jar文件，我明显将其包含在Project的构建路径中。请参阅下面的课程路径：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jre7">
        <attributes>
            <attribute name="owner.project.facets" value="java"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v7.0">
        <attributes>
            <attribute name="owner.project.facets" value="jst.web"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
    <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/concurrentlinkedhashmap-lru-1.3.1.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/geronimo-jta_1.1_spec-1.1.1.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/lucene-core-3.6.2.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-cypher-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-graph-algo-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-graph-matching-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-jmx-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-kernel-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-lucene-index-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-shell-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/neo4j-udc-1.9.4.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/org.apache.servicemix.bundles.jline-0.9.94_1.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/scala-library-2.10.0.jar"/>
    <classpathentry kind="lib" path="C:/Users/Florent/Desktop/neo4j/server-api-1.9.4.jar"/>
    <classpathentry kind="output" path="build/classes"/>
</classpath>

有关该问题的任何帮助？

谢谢！

Answer 1

您好像没有将Neo4j罐子添加到您的lib文件夹中。

在设置Neo4J J2EE项目时出现问题

1 个答案: