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java.lang.IllegalStateException : Failed to introspect Class 错误

转载 作者:搜寻专家 更新时间:2023-10-31 19:51:51 25 4
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我正在尝试将 Elasticsearch 添加到我的项目中。我已将必要的依赖项添加到我的 pom.xml 文件中。当我运行服务器时出现此错误:

java.lang.IllegalStateException: Failed to introspect Class
[net.kzn.shoppingbackend.config.HibernateConfig] from ClassLoader
[ParallelWebappClassLoader

请帮我解决这个问题。

我也试图在 eclipse 中找到 elasticsearch.yml 文件来配置节点,但没有这样的文件。我在哪里可以找到 elasticsearch.yml 文件。

HibernateConfig.java

package net.kzn.shoppingbackend.config;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp2.BasicDataSource;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
import org.springframework.orm.hibernate5.HibernateTransactionManager;
import org.springframework.orm.hibernate5.LocalSessionFactoryBuilder;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@EnableElasticsearchRepositories(basePackages = "net.kzn.shoppingbackend")
@ComponentScan(basePackages = { "net.kzn.shoppingbackend" })
@EnableTransactionManagement
public class HibernateConfig {

// change the below based on the DBMS you choose
private final static String DATABASE_URL = "jdbc:h2:tcp://localhost/~/onlineshopping";
private final static String DATABASE_DRIVER = "org.h2.Driver";
private final static String DATABASE_DIALECT = "org.hibernate.dialect.H2Dialect";
private final static String DATABASE_USERNAME = "sa";
private final static String DATABASE_PASSWORD = "";

@Value("${elasticsearch.home:/home/vidyesh/.m2/repository/org/elasticsearch/client/elasticsearch-rest-client/5.6.8}")
private String elasticsearchHome;

@Value("${elasticsearch.cluster.name:elasticsearch}")
private String clusterName;

// database bean will be available
@Bean("dataSource")
public DataSource getDataSource() {
BasicDataSource dataSource = new BasicDataSource();

// providing the database connection information

dataSource.setDriverClassName(DATABASE_DRIVER);
dataSource.setUrl(DATABASE_URL);
dataSource.setUsername(DATABASE_USERNAME);
dataSource.setPassword(DATABASE_PASSWORD);

return dataSource;
}

// sessionFactory bean will be available
@Bean
public SessionFactory getSessionFactory(DataSource dataSource) {

LocalSessionFactoryBuilder builder = new LocalSessionFactoryBuilder(dataSource);

builder.addProperties(getHibernateProperties());
builder.scanPackages("net.kzn.shoppingbackend");

return builder.buildSessionFactory();
}

// All the hibernate properties will be returned in this method
private Properties getHibernateProperties() {

Properties properties = new Properties();

properties.put("hibernate.dialect", DATABASE_DIALECT);
properties.put("hibernate.show_sql", "true");
properties.put("hibernate.format_sql", "true");

properties.put("hibernate.hbm2ddl.auto", "update");

return properties;
}

@Bean
public Client client() {
TransportClient client = null;
try {
final Settings elasticsearchSettings = Settings.builder()
.put("client.transport.sniff", true)
.put("path.home", elasticsearchHome)
.put("cluster.name", clusterName).build();
client = new PreBuiltTransportClient(elasticsearchSettings);
client.addTransportAddress(new TransportAddress(InetAddress.getByName("127.0.0.1"), 9300));

} catch (UnknownHostException e) {
e.printStackTrace();
}
return client;
}

@Bean
public ElasticsearchOperations elasticsearchTemplate() {
return new ElasticsearchTemplate(client());
}

// transactionManager bean
@Bean
public HibernateTransactionManager geTransactionManager(SessionFactory sessionFactory) {

HibernateTransactionManager transactionManager = new HibernateTransactionManager(sessionFactory);
return transactionManager;
}

}

Loaders.java

package net.kzn.shoppingbackend.load;

import java.util.ArrayList;
import java.util.List;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import net.kzn.shoppingbackend.dto.Product;
import net.kzn.shoppingbackend.dto.Users;
import net.kzn.shoppingbackend.repository.UsersRepository;

@Component
public class Loaders {

@Autowired
ElasticsearchOperations operations;

@Autowired
UsersRepository usersRepository;

@PostConstruct
@Transactional
public void loadAll(){

operations.putMapping(Product.class);
System.out.println("Loading Data");
usersRepository.save(getData());
System.out.printf("Loading Completed");

}

private List<Users> getData() {
List<Users> userses = new ArrayList<>();
userses.add(new Users("Ajay",123L, "Accounting", 12000L));
userses.add(new Users("Jaga",1234L, "Finance", 22000L));
userses.add(new Users("Thiru",1235L, "Accounting", 12000L));
return userses;
}
}

这是我的 pom.xml 文件

POM.xml

<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>net.kzn</groupId>
<artifactId>shoppingbackend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>shoppingbackend</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>5.1.1.RELEASE</spring.version>
<hibernate.version>5.3.6.Final</hibernate.version>
<jackson.version>2.9.6</jackson.version>
</properties>

<dependencies>
<!-- JUNIT version 4.12 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>

<!-- spring -->

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>

<!-- H2 database -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
</dependency>

<!-- Hibernate Dependency -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-search-elasticsearch</artifactId>
<version>5.10.4.Final</version>
</dependency>


<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.11.1</version>
</dependency>


<!-- database connection pooling -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.4.0</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.6</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.6</version>
</dependency>

<!-- SLF4J logging -->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.2.3</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.25</version>
</dependency>

<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.12.Final</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch -->
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>6.3.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.elasticsearch.client/transport -->
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>6.3.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.elasticsearch.plugin/transport-netty4-client -->
<dependency>
<groupId>org.elasticsearch.plugin</groupId>
<artifactId>transport-netty4-client</artifactId>
<version>6.3.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-elasticsearch -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-elasticsearch</artifactId>
<version>3.0.11.RELEASE</version>
</dependency>


<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>4.2.2</version>
</dependency>



</dependencies>

<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>

错误

    ERROR Context
initialization failed 19:56:48.391" o.s.web.context.ContextLoader java.lang.IllegalStateException:
Failed to introspect Class[net.kzn.shoppingbackend.config.HibernateConfig]from ClassLoader[ParallelWebappClassLoader
context:
onlineshopping
delegate:false---------->
Parent Classloader:java.net.URLClassLoader @24d 46 ca6]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:680)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:577)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:562)
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:620)
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:721)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:662)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:630)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1491)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:507)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:477)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:99)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:691)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:528)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291)

请告诉我我做错了什么?问题与依赖关系有关?

最佳答案

Caused by: java.lang.ClassNotFoundException:org.springframework.data.elasticsearch.core.ElasticsearchOperations

此错误消息表示包含此类的 jar 不在应用程序类路径中。

将 spring-data-elasticsearch jar 添加到其中,您的错误应该消失了。

如果您使用的是 Maven,请以这种方式将 jar 添加到类路径中:

<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-elasticsearch</artifactId>
<version>3.2.5.RELEASE</version>
</dependency>

您应该使用的版本取决于您连接到的 Elasticsearch 的版本:

+--------------+----------------------------+----------------+-------------+| Spring Data  | Spring Data Elasticsearch  | Elasticsearch  | Spring Boot |+--------------+----------------------------+----------------+-------------+| 2021.1       | 4.3.x                      |         7.15.2 | 2.5.x       || 2021.0       | 4.2.x                      |         7.12.0 | 2.5.x       || 2020.0.0     | 4.1.x                      |          7.9.3 | 2.3.x       || Neumann      | 4.0.x                      |          7.6.2 | 2.3.x       || Moore        | 3.2.x                      |          6.8.4 | 2.2.x       || Lovelace     | 3.1.x                      |          6.2.2 | 2.1.x       || Kay          | 3.0.x                      |          5.5.0 | 2.0.x       || Ingalls      | 2.1.x                      |          2.4.0 | 1.5.x       |+--------------+----------------------------+----------------+-------------+

(来源:https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#preface.versions)

关于java.lang.IllegalStateException : Failed to introspect Class 错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53284134/

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