java Springboot应用在实现MongoRepository时无法运行
我有一个Springboot应用程序来管理ID。它当前读取ID并将其保存到文件中。我正试图使用Spring内置的Mongo存储库将该功能转移到MongoDB
ServiceProviderRepository
package repositories;
import org.springframework.data.mongodb.repository.MongoRepository;
import models.ServiceProvider;
public interface ServiceProviderRepository extends MongoRepository<ServiceProvider, String> {
public ServiceProvider findByID(int id);
public ServiceProvider findByUsername(String username);
}
服务提供商
package models;
import org.springframework.data.annotation.Id;
public class ServiceProvider {
@Id
private String id;
private int providerId;
private String username;
public ServiceProvider() {}
public ServiceProvider(int id, String username) {
this.providerId = id;
this.username = username;
}
public ServiceProvider(int id) {
this.providerId = id;
}
public int getId() {
return providerId;
}
@Override
public String toString() {
return String.format("ServiceProvider[id=%s, providerId='%s', username='%s']", id, providerId, username);
}
}
应用程序
package app;
import java.io.IOException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import org.springframework.web.client.RestTemplate;
import controllers.ServiceProviderController;
import models.ServiceProvider;
import repositories.ServiceProviderRepository;
@SpringBootApplication
@ComponentScan(basePackageClasses = ServiceProviderController.class9)
@EnableMongoRepositories(basePackageClasses = ServiceProviderRepository.class)
public class Application implements CommandLineRunner {
@Autowired
private ServiceProviderRepository repository;
public static void main(String[] args) throws SecurityException, IOException {
SpringApplication.run(Application.class, args);
}
@Override
public void run(String... args) {
repository.deleteAll();
repository.save(new ServiceProvider(1234, "Provider1"));
}
@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder) {
return builder.build();
}
}
pom。xml
<?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>
<groupId>com.rquinlan</groupId>
<artifactId>sti-pa-POC</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>sti-pa-POC Maven Webapp</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
</parent>
<repositories>
<repository>
<id>nexus</id>
<url>.....</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</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-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.0</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.0</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20090211</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-jersey-jaxrs</artifactId>
<version>1.5.0</version>
</dependency>
</dependencies>
<build>
<finalName>sti-pa-POC</finalName>
</build>
</project>
目标是通过我的控制器通过端点访问存储库，但目前我只是在应用程序中进行。java来实现这些功能。我已经在spring guides网站上完成了客户教程并运行了它，我在这里使用的格式基本相同。当我试图在Maven中运行它时，我得到了堆栈跟踪
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'application': Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [app.Application] from ClassLoader [org.springframework.boot.devtools.restart.classloader.RestartClassLoader@1aa76ad7]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at app.Application.main(Application.java:40) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_171]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_171]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_171]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_171]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.2.RELEASE.jar:2.0.2.RELEASE]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [app.Application] from ClassLoader [org.springframework.boot.devtools.restart.classloader.RestartClassLoader@1aa76ad7]
at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:758) ~[spring-core-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.util.ReflectionUtils.doWithLocalFields(ReflectionUtils.java:690) ~[spring-core-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.buildResourceMetadata(CommonAnnotationBeanPostProcessor.java:355) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.findResourceMetadata(CommonAnnotationBeanPostProcessor.java:339) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:298) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1020) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE]
... 20 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/data/mongodb/repository/MongoRepository
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_171]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_171]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_171]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_171]
at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_171]
at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_171]
at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_171]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_171]
at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_171]
at org.springframework.boot.devtools.restart.classloader.RestartClassLoader.findClass(RestartClassLoader.java:163) ~[spring-boot-devtools-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.devtools.restart.classloader.RestartClassLoader.loadClass(RestartClassLoader.java:145) ~[spring-boot-devtools-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_171]
at java.lang.Class.getDeclaredFields0(Native Method) ~[na:1.8.0_171]
at java.lang.Class.privateGetDeclaredFields(Class.java:2583) ~[na:1.8.0_171]
at java.lang.Class.getDeclaredFields(Class.java:1916) ~[na:1.8.0_171]
at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:753) ~[spring-core-5.0.6.RELEASE.jar:5.0.6.RELEASE]
... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.data.mongodb.repository.MongoRepository
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_171]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_171]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_171]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_171]
at org.springframework.boot.devtools.restart.classloader.RestartClassLoader.loadClass(RestartClassLoader.java:148) ~[spring-boot-devtools-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_171]
... 42 common frames omitted
独立应用程序和我尝试将其合并到实际应用程序中时的格式基本相同，我无法找出导致错误的原因。感谢您的帮助。谢谢
# 1 楼答案
这里有几件事：
您需要将模型标记为
@Document：@Document 公共类服务提供者{
}
你不需要
@ComponentScan和@EnableMongoRepositories，因为@SpringBootApplication启用了@ComponentScan。查找文档here最后，您需要告诉spring为MongoDB创建一个上下文，如下所示：
申请。yml
您可以在GitHub上找到最简单的完全工作的project starter版本