Question

我测试了我的春季启动项目作为一个单独的maven项目，一切正常。我决定将我的应用程序拆分为子模块。 repository，serive和spring boot web模块。自动装配停止工作。并发生以下错误：

20:12:08.052 [main] WARN  o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userRestController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.plendo.service.interfaces.UserService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
20:12:08.068 [main] WARN  o.s.boot.SpringApplication - Error handling failed (Error creating bean with name 'delegatingApplicationListener' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' available)
20:12:08.243 [main] ERROR o.s.b.d.LoggingFailureAnalysisReporter - ``
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userService in org.plendo.ui.controller.UserRestController required a bean of type 'org.plendo.service.interfaces.UserService' that could not be found.

Answer 1

项目结构：包含jpa模块，服务模块和Web模块（spring boot app）的父项目

spring boot应用程序类：web模块

package org.plendo.ui;     
@SpringBootApplication public class App { public static void main(String[] args) { 
@SpringBootApplication
public class App {
public static void main(String[] args) {
    SpringApplication.run(App.class, args);
}
    }

RestController类：web模块

package org.plendo.ui.controller;
import org.plendo.jpa.entity.User;

import org.plendo.service.interfaces.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
//@ComponentScan("org.plendo.service.interfaces")
public class UserRestController {

@Autowired
//@Qualifier("userService")
private UserService userService;

@RequestMapping(value = "/saveUser")
public User saveUser(User u) {
    return userService.saveUser(u);
}
}

UserServiceImpl：服务模块

import org.apache.log4j.Logger;
import org.plendo.jpa.entity.User;
import org.plendo.jpa.entity.UserRepository;
import org.plendo.service.interfaces.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

private Logger logger = Logger.getLogger(this.getClass());
@Autowired
UserRepository userRepository;

@Override
public User saveUser(User u) {
    return userRepository.save(u);
}

}

UserService接口：服务模块

package org.plendo.service.interfaces;

import org.plendo.jpa.entity.User;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

public interface UserService {

public User saveUser(User u);
}

UserRepository接口：jpa模块

package org.plendo.jpa.entity;

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

public interface UserRepository  extends JpaRepository<User, String>{

}

还有其他事可做吗？

RestController需要一个带有弹簧启动的服务bean＆amp;多模块

1 个答案: