我又来了,这次是关于spring-boot-starter-data-jpa的问题。我正在使用spring-boot访问多个数据库。MongoDB没问题,Cassandra也没问题,但PostgreSQL和JPA有些问题。我认为我的配置可能有问题。你能帮我找出问题所在吗?我已经参考了spring-boot、spring-data-jpa以及spring-boot-starter-data-jpa的文档,但都没有帮助。我在stackoverflow上找到了一些帖子,他们使用jdbc和hsql依赖包,因为jpa不能正常工作Link。我自己尝试了一下,但是却收到一个no qualifying bean error。
所以我退了一步,包含了jpa和hsql,编写了一个PostgresConfig类,但仍然无济于事。如果我使用@EnableJpaRepositories注解,就会出现奇怪的错误。请参见StacktracePara 67.5.2 Error... 我没有使用过liquibase,不知道为什么会出错... 如果我不使用DataSourceBuilder,我的application.properties文件将无法被读取,我会收到数据库类型NONE的错误。
一些资源: Stack Trace:
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration$LiquibaseConfiguration': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Cannot find changelog location: class path resource [db/changelog/db.changelog-master.yaml] (please add changelog or check your Liquibase configuration)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1566)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:368)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at com.kage.bigdata.bida.Application.main(Application.java:22)
Caused by: java.lang.IllegalStateException: Cannot find changelog location: class path resource [db/changelog/db.changelog-master.yaml] (please add changelog or check your Liquibase configuration)
at org.springframework.util.Assert.state(Assert.java:385)
at org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration$LiquibaseConfiguration.checkChangelogExists(LiquibaseAutoConfiguration.java:83)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:349)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:300)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:133)
... 26 more
application.properties:
spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=postgres
spring.datasource.password=postgres
spring.datasource.schema=bigdata
spring.datasource.platform=postgresql
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.generate-ddl=true
spring.jpa.database=postgresql
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=drop-create
配置:
package com.kage.bigdata.bida.config;
import javax.sql.DataSource;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
/**
*
* @author bl4ckbird
*/
@Configuration
@EnableJpaRepositories("com.kage.bigdata.bida.repository.postgres")
public class PostgresConfig {
@Bean
public DataSource dataSource() {
return DataSourceBuilder.create().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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.kage.bigdata</groupId>
<artifactId>bida</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901-1.jdbc4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-cassandra</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.2</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
应用:
package com.kage.bigdata.bida;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
*
* @author bl4ckbird
*/
@SpringBootApplication
public class Application {
public static void main(String[] args) throws Throwable {
SpringApplication app = new SpringApplication(Application.class);
app.run();
}
}
代码仓库:
package com.kage.bigdata.bida.repository.postgres;
import com.kage.bigdata.bida.model.Question;
import org.springframework.data.jpa.repository.JpaRepository;
/**
*
* @author bl4ckbird
*/
public interface QPostgresRepository extends JpaRepository<Question, String> {
}
QuestionEntity(多注释(Cassandra,Mongo,JPA):
package com.kage.bigdata.bida.model;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import lombok.Getter;
import lombok.Setter;
import org.springframework.data.annotation.Id;
import org.springframework.data.cassandra.mapping.PrimaryKey;
import org.springframework.data.cassandra.mapping.Table;
/**
*
* @author bl4ckbird
*/
@Table
@Entity
public class Question implements Serializable{
@Id
@PrimaryKey
@Getter
@Setter
@GeneratedValue(strategy = GenerationType.AUTO)
@javax.persistence.Id
private String id;
@Getter
@Setter
private String question;
@Override
public String toString() {
return String.format(
"Question[id=%s, Question='%s']",
id, question);
}
}
自动装配服务:
package com.kage.bigdata.bida.service.impl;
import com.kage.bigdata.bida.model.Question;
import com.kage.bigdata.bida.repository.cassandra.QCassandraRepository;
import com.kage.bigdata.bida.repository.QuestionRepository;
import com.kage.bigdata.bida.repository.postgres.QPostgresRepository;
import com.kage.bigdata.bida.service.QuestionService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
/**
*
* @author bl4ckbird
*/
@Service
public class QuestionServiceImpl implements QuestionService{
@Autowired
QuestionRepository questionRepository;
@Autowired
QCassandraRepository cassandraRepository;
@Autowired
QPostgresRepository postgresRepository;
public QuestionServiceImpl(){};
@Override
@Transactional
public void test() {
Question q = new Question();
q.setQuestion("Frage");
questionRepository.save(q);
System.out.println(questionRepository.findAll());
q.setQuestion("Frage2");
cassandraRepository.save(q);
System.out.println(cassandraRepository.findAll());
}
}
spring-data-cassandra
的传递依赖项。如果您没有使用它,您可能想要尝试在 pom 中排除它。 - Andy Wilkinson