创建在类路径资源中定义了名称"loadTimeWeaver"的 Bean 时出错

Question

我是Spring Boot的新手，希望得到一些帮助来解决这个错误。

我正试图通过EclipseLink从Docker容器连接到数据库。我希望能够在一个表中存储JSON数据，并从另一个表中检索JSON数据。在运行代码时，我遇到了这个错误。

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.10</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>de.cibplus</groupId>
<artifactId>cibplus-ng-vdp-GKZ</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>cibplus-ng-vdp-GKZ</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
</exclusion>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency> 
<groupId>javax.xml.bind</groupId> 
<artifactId>jaxb-api</artifactId> 
<version>2.3.0</version> 
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa</artifactId>
<version>2.7.8</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<scope>runtime</scope>
</dependency>

<!-- 
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
<scope>provided</scope>
</dependency>
<!-- <dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<configuration>
<executable>java</executable>
<arguments>
<argument>-Xmx1000m</argument>
<argument>-javaagent:lib/eclipselink-${eclipselink.version}.jar</argument>
<argument>-classpath</argument>
<classpath/>
<argument>my.App</argument>
</arguments>
</configuration>
</plugin>
</plugins>
</build>
</project>

JpaConfiguration.java

package de.cibplus.cibplusngvdpGKZ;
import java.util.Map;
import java.util.Properties;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableLoadTimeWeaving;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.AbstractJpaVendorAdapter;
import org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.jta.JtaTransactionManager;
@Configuration
@EnableJpaAuditing
@EnableLoadTimeWeaving
@EnableAutoConfiguration
public class JpaConfiguration extends JpaBaseConfiguration {
public JpaConfiguration(DataSource dataSource, JpaProperties props, ObjectProvider<JtaTransactionManager> txm) {
super(dataSource, props, txm);
}
@Bean
public EntityManagerFactory entityManagerFactory() {
AbstractJpaVendorAdapter vendorAdapter = new EclipseLinkJpaVendorAdapter();
vendorAdapter.setGenerateDdl(false);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
Properties properties = new Properties();
properties.setProperty("eclipselink.weaving", "static");
factory.setJpaProperties(properties);
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("de.cibplus.cibplusngvdpGKZ.Repository");
factory.afterPropertiesSet();
return factory.getObject();
}

@Bean
public PlatformTransactionManager transactionManager() {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory());
return txManager;
}

protected AbstractJpaVendorAdapter createJpaVendorAdapter() {
// TODO Auto-generated method stub
return null;
}
protected Map<String, Object> getVendorProperties() {
// TODO Auto-generated method stub
return null;
}
}

Answer 1

下面的代码解决了这个错误。

public class JpaConfiguration extends JpaBaseConfiguration {

@Autowired
JpaProperties properties;
public JpaConfiguration(DataSource dataSource, JpaProperties props, ObjectProvider<JtaTransactionManager> txm) {
super(dataSource, props, txm);
}


@Bean
public InstrumentationLoadTimeWeaver loadTimeWeaver() throws Throwable {
InstrumentationLoadTimeWeaver loadTimeWeaver = new InstrumentationLoadTimeWeaver();
return loadTimeWeaver;
}
@Override
protected AbstractJpaVendorAdapter createJpaVendorAdapter() {
// TODO Auto-generated method stub
return new EclipseLinkJpaVendorAdapter();
}
@Override
protected Map<String, Object> getVendorProperties() {
// TODO Auto-generated method stub
return new HashMap<>(properties.getProperties());
}
}