Question

当我尝试将我的.war项目（Spring Boot）部署在Tomcat服务器上时，日志上出现以下异常。请注意，此异常不会在本地发生，因此我只能在服务器环境中重现它。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mappingComponent': Failed to introspect bean class [com.project.components.MappingComponent] for lookup method metadata: could not find class that it depends on; nested exception is java.lang.NoClassDefFoundError: java/time/temporal/Temporal
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:269) ~[spring-beans-4.3.5.RELEASE.jar:4.3.5.RELEASE]

我当然搜索了这个问题，并且更改了对ton pom.xml的某些依赖关系，还删除并添加了构造函数，以防万一，但我不知道为什么会这样。

MappingComponent发生异常的原因

@Component
public class MappingComponent {
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    Repository1 repo1;

    @Autowired
    Repository2 repo2;

    //no constructors
    //methods that are using the repositories

  }

MappingController注入MappingComponent的类

@RestController
@CrossOrigin
@RequestMapping("/services")
public class MappingController {

      @Autowired
      private ClientComponent clientComponent;

      @Autowired
      private MappingComponent mappingComponent;

      //no constructors
      //services that are using the components

 }

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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>services</groupId>
    <artifactId>services</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>services</name>
    <description>Services</description>
    <packaging>war</packaging>  
    <properties>
        <java.version>1.7</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </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-devtools</artifactId>
            <scope>runtime</scope>
        </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-jpa</artifactId>
        </dependency>
        <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-entitymanager</artifactId>
            </dependency>

            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-validator</artifactId>
            </dependency>


        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

             <plugin>
                            <groupId>org.springframework.boot</groupId>
                            <artifactId>spring-boot-maven-plugin</artifactId>
                            <executions>
                              <execution>
                                <goals>
                                  <goal>repackage</goal>
                                </goals>
                              </execution>
                            </executions>
                        </plugin>
        </plugins>
    </build>

</project>

主班

@SpringBootApplication
public class ServicesApplication extends SpringBootServletInitializer {


    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(ServicesApplication.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(ServicesApplication.class, args);
    }

}

我知道java和spring都已经过时，但是将它们升级到较新的版本并不依赖于我。那不是问题，因为部署了其他具有相同版本（和相同pom.xml）的服务。

Answer 1

临时类仅在1.8中引入，在pom中我看到您使用1.7。如果不确定何时引入类，只需在Javadoc中检查@Since标记即可。

Answer 2

您可能需要将外部依赖项jar外部添加到Tomcat Web服务器的lib目录中。首先关闭tomcat，将jar添加到lib目录，然后启动tomcat。

对已部署的Tomcat服务器的组件上的注入失败[Spring Boot]

2 个答案: