Question

我正在使用带有基于注释的配置的spring-boot创建一个Web应用程序。

首先，我使用Hibernate和JPA创建了一个基于注释的config的spring应用程序。它运行正常，但是随后我需要将spring-boot添加到我的应用程序中，现在无法启动它。这是代码：

@SpringBootApplication
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class Runner {

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

@Configuration
@EnableTransactionManagement
@ComponentScans(value = { @ComponentScan("com.alex.pharm.dao"),
        @ComponentScan("com.alex.pharm.service") })
public class AppConfig {
    @Bean
    public LocalEntityManagerFactoryBean geEntityManagerFactoryBean() {
        LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean();
        factoryBean.setPersistenceUnitName("LOCAL_PERSISTENCE");
        return factoryBean;
    }

    @Bean
    @ConditionalOnMissingBean(type = "JpaTransactionManager")
    public JpaTransactionManager geJpaTransactionManager() {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(geEntityManagerFactoryBean().getObject());
        return transactionManager;
    }
}

@RestController
public class HelloController {

    @RequestMapping("/")
    public String index() {
        return "Greetings from Spring Boot!";
    }
}

    <groupId>com.sachatol.pharmacy</groupId>
    <artifactId>pharmacyWebStore</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.1</version>
        </dependency><!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.13</version>
        </dependency>
        <!-- Hibernate 5.2.9 Final -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.2.9.Final</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>
        <!-- Spring ORM -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>


    <build>
        <sourceDirectory>src/main/java</sourceDirectory>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

但是当我尝试运行它时，出现以下异常：

ConfigServletWebServerApplicationContext : Exception encountered during context initialization
 - cancelling refresh attempt:org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'requestMappingHandlerMapping' 
defined in class path resource
 [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: 
Initialization of bean failed; nested exception is java.lang.NoSuchMethodError: 
org.springframework.web.servlet.handler.AbstractHandlerMapping.obtainApplicationContext()
Lorg/springframework/context/ApplicationContext;

我该如何解决？

Answer 1

您的 @RequestMapping 似乎缺少某些部分，请尝试使用类似的方法：

@RequestMapping(value = "/", method = RequestMethod.GET)

Answer 2

在您的请求映射中，您没有正确使用：
@RequestMapping("/")

相反，使用此映射来指定端点和请求方法，如下所示： @RequestMapping(value = "/", method = RequestMethod.GET)

希望它能解决您的问题。

Answer 3

发现了问题-我在pom（4.3.7.RELEASE）中使用了旧版本的spring-context，它覆盖了spring-boot所具有的版本，并且是NoSuchMethodError的原因。因此，在删除或更改为较新版本（5.0.3）的应用程序后，spring-context依赖项已过时且过时了

Answer 4

如果您有两个具有相同请求映射值的方法，也会发生这种情况。确保您拥有唯一的 RequestMapping 值。

如何解决创建名称为'requestMappingHandlerMapping'的bean的错误

4 个答案: