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java - Spring 柠檬 BeanCurrentlyInCreationException : Error creating bean

转载 作者:行者123 更新时间:2023-11-30 08:02:24 31 4
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我正在尝试学习这个 spring-lemon 入门教程 ( https://naturalprogrammer.gitbooks.io/spring-lemon-getting-started/content/index.html ),但我无法在某个时刻继续学习。我创建了一个新的 spring starter 项目(Spring boot),并且能够向其中添加 spring lemon。我只是按照说明进行操作,但是当我开始构建 maven 时,测试失败并出现以下错误:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'lmnDemoController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void com.naturalprogrammer.spring.lemon.LemonController.setLemonService(com.naturalprogrammer.spring.lemon.LemonService); nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'lmnDemoService': Bean with name 'lmnDemoService' has been injected into other beans [authenticationSuccessHandler] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.

我的 LmnDemoService.java 是:

package com.example;

import org.springframework.stereotype.Service;
import com.naturalprogrammer.spring.lemon.LemonService;

@Service
public class LmnDemoService extends LemonService<User, Long> {
@Override
protected User newUser() {
return new User();
}
}

除了教程所说的行,它没有别的。我错过了什么?

编辑:

LmndemoApplication.java

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import com.naturalprogrammer.spring.lemon.LemonConfig;

@SpringBootApplication(scanBasePackageClasses = {LmndemoApplication.class, LemonConfig.class})
public class LmndemoApplication {

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

LmnDemoController.java

package com.example;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.naturalprogrammer.spring.lemon.LemonController;

@RestController
@RequestMapping("/api/core")
public class LmnDemoController extends LemonController<User, Long> {

}

LmnDemoService.java

package com.example;

import org.springframework.stereotype.Service;

import com.naturalprogrammer.spring.lemon.LemonService;

@Service
public class LmnDemoService extends LemonService<User, Long> {

@Override
protected User newUser() {
return new User();
}
}

SecurityConfig.java

package com.example;

import org.springframework.context.annotation.Configuration;

import com.naturalprogrammer.spring.lemon.security.LemonSecurityConfig;

@Configuration
public class SecurityConfig extends LemonSecurityConfig {

}

ServletInitializer.java

package com.example;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

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

}

用户.java

package com.example;

import javax.persistence.Entity;
import javax.persistence.Table;

import com.naturalprogrammer.spring.lemon.domain.AbstractUser;

@Entity
@Table(name="usr")
public class User extends AbstractUser<User,Long> {

private static final long serialVersionUID = 2716710947175132319L;

}

UserRepository.java

package com.example;

import com.naturalprogrammer.spring.lemon.domain.AbstractUserRepository;

public interface UserRepository extends AbstractUserRepository<User, Long> {

}

application.properties

#Database configuration
spring.jpa.database: MYSQL
spring.jpa.hibernate.ddl-auto: update

spring.datasource.url: jdbc:mysql://localhost:3306/mydatabase
spring.datasource.username: myuser
spring.datasource.password: mypassword

#DevTools configuration
spring.devtools.livereload.enabled: false
spring.devtools.restart.enabled: false

#Application URL
#lemon.application-url: http://localhost:9000

#reCAPTCHA configuration
#lemon.recaptcha.sitekey: your google recaptcha site key
#lemon.recaptcha.secretkey: your google recaptcha secret key

#Remember me configuration
#lemon.remember-me-key: someSecret

#First administrator
lemon.admin.username: admin@example.com
lemon.admin.password: admin

#Email configuration
#spring.mail.host = smtp.gmail.com
#spring.mail.username = xxxxxx@gmail.com
#spring.mail.password = xxxxxx
#
#spring.mail.properties.mail.smtp.auth = true
#spring.mail.properties.mail.smtp.socketFactory.port = 465
#spring.mail.properties.mail.smtp.socketFactory.class = javax.net.ssl.SSLSocketFactory
#spring.mail.properties.mail.smtp.socketFactory.fallback = false
#spring.mail.properties.mail.smtp.ssl.enable = true

#Handling cross origin requests configuration
#lemon.cors.allowed-origins: http://localhost:9000

#This will disable the protection against JSON vulnerability
#lemon.enabled.json-prefix: false

pom.xml

http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<name>lmndemo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

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

<!-- Spring-lemon -->
<dependency>
<groupId>com.naturalprogrammer.spring</groupId>
<artifactId>spring-lemon</artifactId>
<version>0.8.5</version><!-- See https://github.com/naturalprogrammer/spring-lemon/releases for latest release -->
</dependency>
</dependencies>

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

最佳答案

在我看来像是一个循环引用问题。它没有发生在我的环境中,我认为理想情况下 Spring 应该能够自行解决它,但我认为最好是修复 Spring Lemon 代码以使其更健壮。

那么,你能否尝试在 check out 的 Spring Lemon 代码中的 AuthenticationSuccessHandler 类的 setLemonService 方法上添加一个 @Lazy 注解你的工作区?使它看起来如下:

@Autowired
@Lazy // add this line
public void setLemonService(LemonService<?, ?> lemonService) {
this.lemonService = lemonService;
}

我之前没有尝试过@Lazy,但我认为它应该可以。如果不是,我们将需要考虑另一种方法来打破循环依赖。

告诉我。找到解决方案后,我将检查 Spring Lemon 存储库的修复。

关于java - Spring 柠檬 BeanCurrentlyInCreationException : Error creating bean,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36990328/

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