我想在Neo4j图形数据库之上开发一个java应用程序。 对于这个应用程序，我想通过https://github.com/jhipster/jhipster-neo4j-app/tree/2a6fa89f8c8aa13dc7ea7856b4ee521efceeb7c7
重用Vitharidis先生在Github上的锅炉板代码这个Neo4j示例是针对Neo4j的旧2.xx版本开发的。我想将数据库更新到3.xx版。因此，我必须在此应用程序中更新Spring Data Neo4j项目实现。
因此，我修改了POM.XML文件中的必要条目。我使用https://github.com/neo4j-examples/movies-java-spring-data-neo4j-4的属性和依赖项作为我的POM.XML文件中的修改示例。 据我所知，这个顶级POM.XML实现应该使用Spring Boot包含所有其他依赖项，包括必要的Spring Data Neo4j依赖项。然而，情况似乎并非如此。 由于修改后的POM.XML，我最终在Eclipse和Maven中出现错误：“DatabaseConfiguration类型的DatabaseConfiguration.java文件中的方法neo4jServer必须覆盖或实现超类型。”
问题：如何修改样板代码中的POM.XML以删除错误消息？
DatabaseConfiguration.java的实现如下所示：
package com.mycompany.myapp.config;
import org.neo4j.ogm.session.Session;
import org.neo4j.ogm.session.SessionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.server.Neo4jServer;
import org.springframework.data.neo4j.server.RemoteServer;
import org.springframework.data.repository.query.QueryLookupStrategy;
@Configuration
@Profile("!test")
@EnableNeo4jRepositories(basePackages = "com.mycompany.myapp.repository", queryLookupStrategy = QueryLookupStrategy.Key.CREATE_IF_NOT_FOUND)
public class DatabaseConfiguration extends Neo4jConfiguration {
private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);
@Override
@Bean
public Neo4jServer neo4jServer() {
log.info("Initialising server connection");
return new RemoteServer("http://localhost:7474", "neo4j", "1234");
}
@Override
@Bean
public SessionFactory getSessionFactory() {
log.info("Initialising Session Factory");
return new SessionFactory("com.mycompany.myapp.domain");
}
@Override
@Bean
public Session getSession() throws Exception {
log.info("Initialising session-scoped Session Bean");
return super.getSession();
}
}
我的POM.XML文件看起来像这样。由于Stackoverflow的限制，我删除了此POM.XML中的大多数非Neo4j相关属性和依赖项。
<?xml version="1.0" encoding="UTF-8"?>
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>spring-boot-starter-parent</artifactId>
<groupId>org.springframework.boot</groupId>
<version>1.3.1.RELEASE</version>
<relativePath/>
</parent>
<groupId>com.mycompany.myapp</groupId>
<artifactId>neo4jhipster</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>neo4jhipster</name>
<repositories>
<repository>
<id>spring-milestones</id>
<url>http://repo.spring.io/milestone</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-milestones</id>
<url>http://repo.spring.io/milestone</url>
</pluginRepository>
</pluginRepositories>
<properties>
<hikaricp.version>2.4.1</hikaricp.version>
<assertj-core.version>3.1.0</assertj-core.version>
<awaitility.version>1.4.0</awaitility.version>
<commons-io.version>2.4</commons-io.version>
<commons-lang.version>2.6</commons-lang.version>
<gatling.version>2.1.7</gatling.version>
<gatling-maven-plugin.version>2.1.7</gatling-maven-plugin.version>
<java.version>1.8</java.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
<javax.inject.version>1</javax.inject.version>
<mapstruct.version>1.0.0.CR1</mapstruct.version>
<maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
<maven-enforcer-plugin.version>1.3.1</maven-enforcer-plugin.version>
<maven-sortpom-plugin.version>2.3.0</maven-sortpom-plugin.version>
<metrics-spark-reporter.version>1.2</metrics-spark-reporter.version>
<metrics-spring.version>3.1.2</metrics-spring.version>
<run.addResources>false</run.addResources>
<spring-security.version>4.0.2.RELEASE</spring-security.version>
<springfox.version>2.0.3</springfox.version>
<!-- Sonar properties -->
<project.testresult.directory>${project.build.directory}/test-results</project.testresult.directory>
<sonar-maven-plugin.version>2.6</sonar-maven-plugin.version>
<jacoco-maven-plugin.version>0.7.4.201502262128</jacoco-maven-plugin.version>
<sonar.exclusions>src/main/webapp/assets/**/*.*, src/main/webapp/bower_components/**/*.*, src/main/webapp/dist/**/*.*</sonar.exclusions>
<sonar.java.codeCoveragePlugin>jacoco</sonar.java.codeCoveragePlugin>
<sonar.jacoco.itReportPath>${project.testresult.directory}/coverage/jacoco/jacoco-it.exec</sonar.jacoco.itReportPath>
<sonar.jacoco.reportPath>${project.testresult.directory}/coverage/jacoco/jacoco.exec</sonar.jacoco.reportPath>
<sonar.javascript.jstestdriver.reportsPath>${project.testresult.directory}/karma</sonar.javascript.jstestdriver.reportsPath>
<sonar.javascript.lcov.reportPath>${project.testresult.directory}/coverage/report-lcov/lcov.info</sonar.javascript.lcov.reportPath>
<sonar.sources>${project.basedir}/src/main/</sonar.sources>
<sonar.surefire.reportsPath>${project.testresult.directory}/surefire-reports</sonar.surefire.reportsPath>
<sonar.tests>${project.basedir}/src/test/</sonar.tests>
<neo4j.version>3.0.1</neo4j.version>
<neo4j-ogm.version>1.1.4</neo4j-ogm.version>
<!-- sdn.version veranderd door Luc van 4.0.0.RELEASE naar 4.1.1.RELEASE -->
<sdn.version>4.1.1.RELEASE</sdn.version>
<!-- Einde verandering Luc -->
<spring-data-neo4j.version>4.1.1.RELEASE</spring-data-neo4j.version>
<spring-data-releasetrain.version>Hopper-SR1</spring-data-releasetrain.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-loader-tools</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- jhipster-needle-maven-add-dependency -->
<!-- spring-data-neo4j -->
<!-- <dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${sdn.version}</version>
</dependency>
-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${spring-data-neo4j.version}</version>
</dependency>
<!-- test scoped beans only -->
<!-- <dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${sdn.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-kernel</artifactId>
<version>${neo4j.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.neo4j.app</groupId>
<artifactId>neo4j-server</artifactId>
<version>${neo4j.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm</artifactId>
<version>${neo4j-ogm.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.neo4j.test</groupId>
<artifactId>neo4j-harness</artifactId>
<version>${neo4j.version}</version>
<scope>test</scope>
</dependency>
-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${spring-data-neo4j.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-kernel</artifactId>
<version>${neo4j.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.neo4j.app</groupId>
<artifactId>neo4j-server</artifactId>
<version>${neo4j.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-test</artifactId>
<version>2.0.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.neo4j.test</groupId>
<artifactId>neo4j-harness</artifactId>
<version>${neo4j.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<defaultGoal>spring-boot:run</defaultGoal>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<filtering>false</filtering>
<excludes>
<exclude>**/*.xml</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>com.google.code.sortpom</groupId>
<artifactId>maven-sortpom-plugin</artifactId>
<version>${maven-sortpom-plugin.version}</version>
<executions>
<execution>
<phase>verify</phase>
<goals>
<goal>sort</goal>
</goals>
</execution>
</executions>
<configuration>
<sortProperties>true</sortProperties>
<nrOfIndentSpace>4</nrOfIndentSpace>
<sortDependencies>groupId,artifactId</sortDependencies>
<sortPlugins>groupId,artifactId</sortPlugins>
<keepBlankLines>true</keepBlankLines>
<expandEmptyElements>false</expandEmptyElements>
</configuration>
</plugin>
<plugin>
<groupId>io.gatling</groupId>
<artifactId>gatling-maven-plugin</artifactId>
<version>${gatling-maven-plugin.version}</version>
<configuration>
<configFolder>src/test/gatling/conf</configFolder>
<dataFolder>src/test/gatling/data</dataFolder>
<resultsFolder>target/gatling/results</resultsFolder>
<bodiesFolder>src/test/gatling/bodies</bodiesFolder>
<simulationsFolder>src/test/gatling/simulations</simulationsFolder>
<!-- This will force Gatling to ask which simulation to run
This is useful when you have multiple simulations -->
<simulationClass>*</simulationClass>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</configuration>
</plugin>
<!-- Maven plugin toevoeging Luc
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3.9</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
Einde Maven plugin toevoeging Luc -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>${maven-enforcer-plugin.version}</version>
<executions>
<execution>
<id>enforce-versions</id>
<goals>
<goal>enforce</goal>
</goals>
</execution>
</executions>
<configuration>
<rules>
<requireMavenVersion>
<message>You are running an older version of Maven. JHipster requires at least Maven 3.0</message>
<version>[3.0.0,)</version>
</requireMavenVersion>
<requireJavaVersion>
<message>You are running an older version of Java. JHipster requires at least JDK ${java.version}</message>
<version>[${java.version}.0,)</version>
</requireJavaVersion>
</rules>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<argLine>-Xmx256m ${surefireArgLine}</argLine>
<!-- Force alphabetical order to have a reproducible build -->
<runOrder>alphabetical</runOrder>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<packagingExcludes>WEB-INF/lib/tomcat-*.jar</packagingExcludes>
</configuration>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>${jacoco-maven-plugin.version}</version>
<executions>
<execution>
<id>pre-unit-tests</id>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<!-- Sets the path to the file which contains the execution data. -->
<destFile>${project.testresult.directory}/coverage/jacoco/jacoco.exec</destFile>
<!-- Sets the name of the property containing the settings for JaCoCo runtime agent. -->
<propertyName>surefireArgLine</propertyName>
</configuration>
</execution>
<!-- Ensures that the code coverage report for unit tests is created after unit tests have been run -->
<execution>
<id>post-unit-test</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
<configuration>
<dataFile>${project.testresult.directory}/coverage/jacoco/jacoco.exec</dataFile>
<outputDirectory>${project.testresult.directory}/coverage/jacoco</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>sonar-maven-plugin</artifactId>
<version>${sonar-maven-plugin.version}</version>
</plugin>
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<version>2.2.4</version>
<configuration>
<defaultOutputDirectory>
${project.build.directory}/generated-sources
</defaultOutputDirectory>
<processors>
<processor>org.mapstruct.ap.MappingProcessor</processor>
</processors>
<options>
<mapstruct.suppressGeneratorTimestamp>true</mapstruct.suppressGeneratorTimestamp>
<mapstruct.defaultComponentModel>spring</mapstruct.defaultComponentModel>
</options>
</configuration>
<executions>
<execution>
<id>process</id>
<phase>generate-sources</phase>
<goals>
<goal>process</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
<jvmArguments>-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005</jvmArguments>
<arguments>
<argument>--spring.profiles.active=dev</argument>
</arguments>
</configuration>
</plugin>
<!-- jhipster-needle-maven-add-plugin -->
</plugins>
<pluginManagement>
<plugins>
<!--
This plugin's configuration is used to store Eclipse m2e settings only.
It has no influence on the Maven build itself.
Remove when the m2e plugin can correctly bind to Maven lifecycle
-->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.jacoco</groupId>
<artifactId>
jacoco-maven-plugin
</artifactId>
<versionRange>
[0.7.4,)
</versionRange>
<goals>
<goal>prepare-agent</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<!-- log configuration -->
<logback.loglevel>DEBUG</logback.loglevel>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
</profile>
<profile>
<id>fast</id>
<properties>
<!-- log configuration -->
<logback.loglevel>DEBUG</logback.loglevel>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
<arguments>
<argument>--spring.profiles.active=dev,fast</argument>
</arguments>
</configuration>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>prod</id>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.github.trecloux</groupId>
<artifactId>yeoman-maven-plugin</artifactId>
<version>0.4</version>
<executions>
<execution>
<id>run-frontend-build</id>
<phase>generate-resources</phase>
<goals>
<goal>build</goal>
</goals>
<configuration>
<buildTool>grunt</buildTool>
<buildArgs>build --force --no-color</buildArgs>
</configuration>
</execution>
</executions>
<configuration>
<yeomanProjectDirectory>${project.basedir}</yeomanProjectDirectory>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>2.5</version>
<configuration>
<filesets>
<fileset>
<directory>src/main/webapp/dist</directory>
</fileset>
<fileset>
<directory>.tmp</directory>
</fileset>
<fileset>
<directory>node_modules</directory>
</fileset>
</filesets>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!-- this is set to false because of https://github.com/jhipster/generator-jhipster/issues/2225 -->
<executable>false</executable>
<arguments>
<argument>--spring.profiles.active=prod</argument>
</arguments>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<!-- log configuration -->
<logback.loglevel>INFO</logback.loglevel>
</properties>
</profile>
</profiles>
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.19</version>
</plugin>
</plugins>
</reporting>
答案 0 :(得分：0)
您在版本4.1.1.RELEASE中使用spring-data-neo4j。在str << GeoObject::getDesc() << ": ";
GeoObject::getPoint().Print(str);
str << ", " << size << ", "<< colour ;
课程中，您正在扩展DatabaseConfiguration。您的问题就像错误所说的那样，您想要覆盖超类中不存在的方法。在SDN的4.1.1.RELEASE版本中，没有一个名为Neo4jConfiguration的方法可以覆盖（这个方法被删除了一些关于4.1.0.RELEASE的东西）
因此，您可以做的是更改您正在使用的SDN版本的配置 - 删除neo4jServer方法并使用如下配置：
neo4jServer另一个选项（我不推荐）是将pom.xml中的SDN版本更改为
@Bean
public SessionFactory getSessionFactory() {
return new SessionFactory(getConfiguration(), "com.mycompany.myapp");
}
@Bean
public Neo4jOperations neo4jTemplate() throws Exception {
return new Neo4jTemplate(getSession());
}
@Bean
public org.neo4j.ogm.config.Configuration getConfiguration() {
org.neo4j.ogm.config.Configuration config = new org.neo4j.ogm.config.Configuration();
config.driverConfiguration().setDriverClassName("org.neo4j.ogm.drivers.http.driver.HttpDriver")
.setURI("http://localhost:7474")
.setCredentials("neo4j", "1234");
return config;
}
@Bean
@Scope(value = "request", proxyMode = ScopedProxyMode.TARGET_CLASS)
public Session getSession() throws Exception {
return super.getSession();
}