我尝试按照 Neo4J 文档使用 neo4j 1.9.4 设置一个非常简单的 J2EE 项目。我创建了一个非常简单的类，其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。
但是每当我想运行我的项目时，我都会收到以下错误：
严重：servlet [jsp] 的 Servlet.service() 在路径 [/RecipeFinder] 的上下文中抛出异常 [An exception occurred processing JSP page /index.jsp at line 14 Stacktrace:] 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) at org.apache.jsp.index_jsp._jspService(index_jsp.java:68) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at 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) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at 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。在 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 处调用(StandardHostValve.java:164)。org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 中的 apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) 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$Http11ConnectionHandler.process(Http11Protocol.java:188) 在 org.apache.tomcat .util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) 在 java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 在 java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 在 java. lang.Thread.run（未知来源）在 org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) 在 org.apache.coyoteAdapter.service(CoyoteAdapter.java:395) 在 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) 调用(StandardEngineValve.java:118) .coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) at java.util.concurrent.ThreadPoolExecutor.runWorker （未知来源）在 java.util.concurrent.ThreadPoolExecutor$Worker.run（未知来源）在 java.lang.Thread.run（未知来源）在 org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) 在 org.apache.coyoteAdapter.service(CoyoteAdapter.java:395) 在 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) 调用(StandardEngineValve.java:118) .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 （未知来源）在 java.util.concurrent.ThreadPoolExecutor$Worker.run（未知来源）在 java.lang.Thread.run（未知来源）进程（Http11Protocol.java:188）在 org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run（JIoEndpoint.java:302）在 java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源）在 java.util。 concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)进程（Http11Protocol.java:188）在 org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run（JIoEndpoint.java:302）在 java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源）在 java.util。 concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)
此类来自 neo4j-jernel-1.9.4.jar 文件，我显然已将其包含在项目的构建路径中。请参阅下面的类路径：
<?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>
关于这个问题的任何帮助？
谢谢！