我在用
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
</exclusion>
</exclusions>
</dependency>
当我对查询进行单元测试时,出现的异常是
10:27:24.803 [http-nio-8080-exec-8] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/rest-api] threw exception [Request processing failed; nested exception is org.neo4j.ogm.metadata.MappingException: Error mapping to ad-hoc class com.lyreco.lab.neo4j.entity.CategoryResult. At present, only @QueryResult types that are discovered by the domain entity package scanning can be mapped.] with root cause
org.neo4j.ogm.metadata.MappingException: Error mapping to ad-hoc class com.lyreco.lab.neo4j.entity.CategoryResult. At present, only @QueryResult types that are discovered by the domain entity package scanning can be mapped.
这是我的CategoryResult类
package com.lyreco.lab.neo4j.entity;
import org.springframework.data.neo4j.annotation.QueryResult;
import com.lyreco.lab.bean.CategoryVO;
@QueryResult
public class CategoryResult {
private Long neo4jId;
private String uuid;
private String name;
private CategoryVO parent = new CategoryVO();
private long numberItems;
...
这是我的应用程序类
package com.lyreco.lab.configuration;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.boot.context.embedded.ErrorPage;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Import;
import org.springframework.data.web.config.EnableSpringDataWebSupport;
import org.springframework.hateoas.config.EnableHypermediaSupport;
import org.springframework.http.HttpStatus;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@SpringBootApplication
@EnableHypermediaSupport(type = { EnableHypermediaSupport.HypermediaType.HAL })
@EnableSpringDataWebSupport
@ComponentScan(basePackages = { "com.lyreco.lab.api", "com.lyreco.lab.service", "com.lyreco.lab.neo4j",
"com.lyreco.lab.security" })
@Import({ SwaggerConfig.class, Neo4jConfig.class, SpringSecurityConfig.class })
public class Application extends SpringBootServletInitializer {
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(Application.class, args);
}
@Bean
public EmbeddedServletContainerCustomizer containerCustomizer() {
return new EmbeddedServletContainerCustomizer() {
@Override
public void customize(ConfigurableEmbeddedServletContainer container) {
ErrorPage error401Page = new ErrorPage(HttpStatus.UNAUTHORIZED, "/401.html");
ErrorPage error404Page = new ErrorPage(HttpStatus.NOT_FOUND, "/404.html");
ErrorPage error500Page = new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/500.html");
container.addErrorPages(error401Page, error404Page, error500Page);
}
};
}
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurerAdapter() {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/rest-api/**").allowedOrigins("http://localhost:9000");
}
};
}
}
这是我的SessionFactory
package com.lyreco.lab.configuration;
import java.util.UUID;
import org.neo4j.ogm.session.SessionFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.event.BeforeSaveEvent;
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.neo4j.template.Neo4jOperations;
import org.springframework.data.neo4j.template.Neo4jTemplate;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import com.lyreco.lab.neo4j.entity.DomainEntity;
@Configuration
@EnableNeo4jRepositories("com.lyreco.lab.neo4j.repository")
@EnableTransactionManagement
@PropertySource("classpath:application.properties")
class Neo4jConfig extends Neo4jConfiguration {
@Value("${neo4j.server.url}")
private String serverAddress;
@Override
public SessionFactory getSessionFactory() {
return new SessionFactory("com.lyreco.lab.neo4j.entity");
}
@Override
public Neo4jServer neo4jServer() {
return new RemoteServer(serverAddress);
}
@Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
return new PropertySourcesPlaceholderConfigurer();
}
@Bean
ApplicationListener<BeforeSaveEvent> beforeSaveEventApplicationListener() {
return new ApplicationListener<BeforeSaveEvent>() {
@Override
public void onApplicationEvent(BeforeSaveEvent event) {
DomainEntity entity = (DomainEntity) event.getEntity();
entity.setUuid(UUID.randomUUID().toString());
}
};
}
// TODO : Bug fix
// cf.
// http://stackoverflow.com/questions/30604863/spring-data-neo4j-4-0-0-beforesaveevent-not-firing
// cf. https://jira.spring.io/browse/DATAGRAPH-710
@Bean
public Neo4jOperations getNeo4jTemplate() throws Exception {
return new Neo4jTemplate(getSession());
}
}
不知道我的代码有什么问题。
最佳答案
此异常表明未扫描包含@QueryResult com.lyreco.lab.neo4j.entity
的程序包。请检查提供给SessionFactory
的软件包的列表。
关于java - @QueryResult映射错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/37609671/