使用Neo4J自動連線的Spring REST Web服務

Question

我正在嘗試開發一個簡單的REST WS，該WS連接到在我的計算機上本地運行的嵌入式Neo4J DB。 首先，我得到了一個簡單的GET操作，只是在調用Service時返回一個簡單的String，並且該字符串正常工作。 現在，我試圖使它真正起作用，所以我搜索了一些有關如何將Spring與Neo4J集成的教程。 事實是，我發現這比我期望的要棘手得多，主要是因為有很多教程，而且它們看起來都不同，所以有大約100種不同的方式來做，而我正在努力適應解。 我不確定我的注釋以及XML配置文件。 給予任何幫助。 願原力與我同在。 :)

UPDATE_1 ：現在是myStore servlet

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
<mvc:annotation-driven />
<context:component-scan base-package="com.ruitex23.myStore" />
<jpa:repositories base-package="com.ruitex23.myStore.repositories" />
<bean name="soapOperationRepository" class="com.ruitex23.myStore.services.SoapOperationService" />
<context:annotation-config />
</beans>

控制器

package com.ruitex23.myStore.controllers;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.ruitex23.myStore.domains.SoapOperation;
import com.ruitex23.myStore.services.SoapOperationService;

@RestController
public class SpringRestController {

@Autowired SoapOperationService operationService;

//the dummy method
@RequestMapping(value = "/hello/{name}", method = RequestMethod.GET)
public String hello(@PathVariable String name) {
    String result = "Hallo " + name;
    return result;
}

//the real method
@RequestMapping(value = "/soapOperation/{version}", method = RequestMethod.GET)
public SoapOperation getSoapOperationByVersion(@PathVariable("version") Integer version) {
    return operationService.searchBySoapOperationVersion(String.valueOf(version));
}
}

倉庫

package com.ruitex23.myStore.repositories;
/**
* 
*/

import org.springframework.data.neo4j.repository.GraphRepository;
import org.springframework.data.repository.query.Param;

import com.ruitex23.myStore.domains.SoapOperation;


/**
* @author ruitex23
*
*/
public interface SoapOperationRepository extends GraphRepository<SoapOperation>  {

SoapOperation findBySoapOperationVersion(@Param("soapOperationVersion") String soapOperationVersion);

}

服務

package com.ruitex23.myStore.services;

/**
* 
*/

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ruitex23.myStore.domains.SoapOperation;
import com.ruitex23.myStore.repositories.SoapOperationRepository;

/**
* @author ruitex23
*
*/
@Service 
public class SoapOperationService {


@Autowired SoapOperationRepository soapOperationRepository;

public SoapOperation searchBySoapOperationVersion(String operationVersion) {
    return soapOperationRepository.findBySoapOperationVersion(operationVersion);
}

}

MyStore Servlet

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

<mvc:annotation-driven />
<context:component-scan base-package="com.ruitex23.myStore" />

//read somewhere that the interface should point to the impl
<bean name="soapOperationRepository" class="com.ruitex23.myStore.services.SoapOperationService" />
<context:annotation-config />

</beans>

web.xml

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
<display-name>myStore</display-name>
<servlet>
    <servlet-name>mystore</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>mystore</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

現在，該錯誤與自動裝配對象有關。

12:05:58.649 [main] WARN  o.s.w.c.s.XmlWebApplicationContext - Exception       encountered during context initialization - cancelling refresh attempt     org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'springRestController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.ruitex23.myStore.services.SoapOperationService com.ruitex23.myStore.controllers.SpringRestController.operationService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'soapOperationService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.ruitex23.myStore.repositories.SoapOperationRepository ruitex23.myStore.services.SoapOperationService.soapOperationRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.ruitex23.myStore.repositories.SoapOperationRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]

錯誤持續不斷，但是我認為這是重要的部分。 如果您需要查看日志錯誤的其他信息，請通知我。

預先感謝

Answer 1

您在XML配置文件中缺少存儲庫的配置。 實際上，如在Spring Data Neo4j的“ 創建存儲庫實例/ XML配置”中所報告-參考文檔：

每個Spring Data模塊都包含一個repositories元素，可讓您簡單地定義Spring會為您掃描的基本軟件包

現在，您需要添加以下內容以添加到XML配置文件中：

 <jpa:repositories base-package="com.ruitex23.myStore.repositories" />

您還必須：

• 在您的<beans...>標記中添加以下架構定義：

  xmlns:jpa="http://www.springframework.org/schema/data/jpa"

• 將以下架構位置添加到您的xsi:schemaLocation ：

  http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd