Question

我正在使用JpaRepository创建一个简单的Spring Boot应用程序，但是当我尝试运行我的应用程序时，出现错误“ NoSuchBeanDefinitionException”。我是Spring Boot的新手。

我也试图用@SpringBootApplication注释我的主类。 @EnableJpaRepositories("com.ab.repository")注释，但是每当我尝试注释@EnableJpaRepository()时，它都会在STS中显示错误

The type org.springframework.data.repository.config.BootstrapMode cannot be resolved. It is indirectly referenced from required .class files.

以前我没有使用此批注，但是我看到一个问题，我必须告诉我的类启用JPA存储库，因此我也尝试了此操作，但是它也不起作用。

我的主班


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootMain {

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

}

控制器类为：


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import com.ab.model.WebServiceModel;
import com.ab.service.WebSrvService;

@RestController
public class WebServiceController {

    @Autowired
    private WebSrvService webSrvService;

    @PostMapping(value = "/save")
    public void saveRecord(@RequestBody WebServiceModel webServiceModel) {
        webSrvService.saveRecord(webServiceModel);
    }
}

服务类别：


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ab.model.WebServiceModel;
import com.ab.repository.WebServiceRepository;

@Service
public class WebSrvService {
    @Autowired
    private WebServiceRepository webServiceRepository;

    public void saveRecord(WebServiceModel webServiceModel) {
        webServiceRepository.save(webServiceModel);
    }
}

存储库接口：


import org.springframework.data.jpa.repository.JpaRepository;

import com.ab.model.WebServiceModel;

public interface WebServiceRepository extends JpaRepository<WebServiceModel, Integer> {

}

我的pom.xml文件是：

<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.ab</groupId>
    <artifactId>SpringBootTry</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.6.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.1.10.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.16</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>3.6.10.Final</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>3.2.18.RELEASE</version>
        </dependency>
</dependencies>
</project>

请纠正我我在做什么错，我希望它可以正常运行，但是出现错误消息：

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ab.repository.WebServiceRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

Answer 1

浏览完您在github上发布的代码后，我正确地将其拉出，因此您的依赖项出现了问题。您错过了包含jar中所有依赖项的spring build插件。

在开始新项目时始终使用Spring initlizr，它将自动为您设置所有这些功能（除非您对spring有丰富的经验并且知道自己在做什么）。 / p>

pom.xml正常运行

<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.ab</groupId>
    <artifactId>SpringBootTry</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    // latest version of spring as of writing 2.1.7
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
    </parent>

    // set what version you want of java 1.8, 9, 10, 11, 12?
    <properties>
        <java.version>11</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-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

    // You need the spring plugin to bild a fat jar that includes all
    // the dependencies. Without this, no dependencies are included in 
    // the jar and you get NoSuchBeanDefinitionexception
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

您还需要更新应用程序属性

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

否则将在启动服务器时收到警告。

Answer 2

删除“ @Repository”，也许可以

Answer 3

I created both the folder structure and code like yours.

package com.ab;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootTry1Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootTry1Application.class, args);
    }

}

Why you change your main class name?Spring boot automatically create main class for you.


package com.ab.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;

import com.ab.model.WebServiceModel;
import com.ab.service.WebService;
@Controller
public class WebServiceController {
    @Autowired
    private WebService webSrvService;

    @PostMapping(value = "/save")
    public void saveRecord(@RequestBody WebServiceModel webServiceModel) {
        webSrvService.saveRecord(webServiceModel);
    }
}


package com.ab.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ab.model.WebServiceModel;
import com.ab.repository.WebServiceRepository;
@Service
public class WebService {
    @Autowired
    private WebServiceRepository webServiceRepository;

    public void saveRecord(WebServiceModel webServiceModel) {
        webServiceRepository.save(webServiceModel);

    }
}


package com.ab.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import com.ab.model.WebServiceModel;

public interface WebServiceRepository extends JpaRepository<WebServiceModel,Integer>{

}

## LOGS ##

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.7.RELEASE)

2019-09-01 18:26:27.412  INFO 5522 --- [           main] com.ab.SpringBootTry1Application         : Starting SpringBootTry1Application on BGINMAC004.local with PID 5522 (/Users/Dildeep.Singh/Documents/workspace-sts-3.9.9.RELEASE/SpringBootTry-1/target/classes started by Dildeep.Singh in /Users/Dildeep.Singh/Documents/workspace-sts-3.9.9.RELEASE/SpringBootTry-1)
2019-09-01 18:26:27.414  INFO 5522 --- [           main] com.ab.SpringBootTry1Application         : No active profile set, falling back to default profiles: default
2019-09-01 18:26:27.992  INFO 5522 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-09-01 18:26:28.055  INFO 5522 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 57ms. Found 1 repository interfaces.
2019-09-01 18:26:28.354  INFO 5522 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$8d03f4e2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-09-01 18:26:28.583  INFO 5522 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-09-01 18:26:28.602  INFO 5522 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-09-01 18:26:28.603  INFO 5522 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.22]
2019-09-01 18:26:28.692  INFO 5522 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-09-01 18:26:28.692  INFO 5522 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1250 ms
2019-09-01 18:26:28.839  INFO 5522 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2019-09-01 18:26:28.937  INFO 5522 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2019-09-01 18:26:28.981  INFO 5522 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
    name: default
    ...]
2019-09-01 18:26:29.141  INFO 5522 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.3.10.Final}
2019-09-01 18:26:29.142  INFO 5522 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
2019-09-01 18:26:29.228  INFO 5522 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
2019-09-01 18:26:29.316  INFO 5522 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2019-09-01 18:26:29.743  INFO 5522 --- [           main] o.h.t.schema.internal.SchemaCreatorImpl  : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@3850e90c'
2019-09-01 18:26:29.746  INFO 5522 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-09-01 18:26:30.149  INFO 5522 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-09-01 18:26:30.210  WARN 5522 --- [           main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2019-09-01 18:26:30.417  INFO 5522 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2019-09-01 18:26:30.420  INFO 5522 --- [           main] com.ab.SpringBootTry1Application         : Started SpringBootTry1Application in 18.317 seconds (JVM running for 23.971)
2019-09-01 18:41:39.601  INFO 5522 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-09-01 18:41:39.602  INFO 5522 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2019-09-01 18:41:39.615  INFO 5522 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 13 ms
2019-09-01 18:47:48.219  WARN 5522 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=6m18s959ms).

我的代码可以正常编译。尝试从STS创建新的spring starter项目，不要触摸spring boot主类并从此处复制相同的文件夹结构。您的代码一定会编译。

我在用JpaRepository创建一个简单的Spring Boot项目时得到了NoSuchBeanDefinitionexception

3 个答案: