Question

我是Spring框架的初学者，并且正在努力解决以下问题：

使用Qualifier批注标记后，Spring似乎无法识别该组件。组件扫描无法找到的软件包似乎有问题。我正在右键单击主类并运行该程序。

到目前为止，我已经尝试了很多事情，但是没有任何效果。但最后我得到以下错误：

启动ApplicationContext时出错。要显示条件报告，请在启用“调试”的情况下重新运行您的应用程序。 2018-06-27 13：37：10.177错误8476 --- [main] o.s.b.d.LoggingFailureAnalysisReporter：

申请无法开始

说明：

com.tony.practicas.controllers.PersonaController中的setEducationLevelServiceAcc方法的参数0需要一个类型为'com.tony.practicas.services.EducationLevelService'的bean。

操作：

考虑在您的配置中定义类型为“ com.tony.practicas.services.EducationLevelService”的bean。

以退出代码1完成的过程

这是项目的结构：

这是我班级的代码：

PersonaController

package com.tony.practicas.controllers;

import com.tony.practicas.services.EducationLevelService;
import com.tony.practicas.services.PersonaService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;

@Controller
public class PersonaController {

private PersonaService personaService;
private EducationLevelService educationLevelService;
private EducationLevelService educationLevelServiceAcc;

@Autowired
public void setPersonaService(PersonaService personaService) {
    this.personaService = personaService;
}

@Autowired
public void setEducationLevelService(EducationLevelService educationLevelService) {
    this.educationLevelService = educationLevelService;
}

@Autowired
@Qualifier("educationLevelAcc")
public void setEducationLevelServiceAcc(EducationLevelService educationLevelServiceAcc) {
    this.educationLevelServiceAcc = educationLevelServiceAcc;
}


public void setPersonaName (String name){
    personaService.setName(name);
    System.out.println(personaService.getName() + educationLevelService.getEducationLevel());
    System.out.println(educationLevelServiceAcc.getEducationLevel());
}
}

主要

package main;

import com.tony.practicas.controllers.PersonaController;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@SpringBootApplication
@Configuration
@EnableAutoConfiguration
@ComponentScan("com.tony.practicas")
public class PracticasApplication {

public static void main(String[] args) {

    ApplicationContext context = SpringApplication.run(PracticasApplication.class, args);

    PersonaController tony = (PersonaController) context.getBean("personaController");
    tony.setPersonaName("Tony");
}
}

服务

package com.tony.practicas.services;

public interface EducationLevelService {
    String getEducationLevel();
}

package com.tony.practicas.services;

import org.springframework.context.annotation.Primary;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Component;

@Component("educationLevelAcc")
@Profile("accountant")
@Primary
public class EducationLevelServiceAccountantImpl implements                 
EducationLevelService {

@Override
public String getEducationLevel() {
    return " Accountant";
    }
}

package com.tony.practicas.services;

import org.springframework.context.annotation.Primary;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Component;

@Component("educationLevelIng")
@Profile("engineer")
@Primary
public class EducationLevelServiceEngineerImpl implements         
EducationLevelService {

@Override
public String getEducationLevel() {
        return " Engineer";
    }
}

package com.tony.practicas.services;

public interface PersonaService {

    public abstract void setName(String name);
    public abstract String getName();

}

package com.tony.practicas.services;

import org.springframework.stereotype.Component;

@Component
public class PersonaServiceImpl implements PersonaService{

    private String name;

    @Override
    public void setName(String name) {
        this.name = name + " Miguel Morantes Polanco";
    }

    @Override
    public String getName() {
        return name;
    }
}

复制属性

spring.profiles.active=accountant

Answer 1

您使用注释group by，这意味着仅在Spring概要文件@Profile("accountant")处于活动状态时才会创建此bean。

具有配置文件特定的配置后，您需要在环境中设置活动配置文件。

有多种方法

•在VM参数中使用-Dspring.profiles.active = prod

•在application.properties中使用spring.profiles.active = prod

http://www.springboottutorial.com/spring-boot-profiles

Spring框架在用限定符注释标记后无法识别组件

1 个答案: