关于SpringBootTest报错java.lang.IllegalStateException: Unable to find a @SpringBootConfiguration的问题解决方案

一、问题的现象

1、使用spring-boot-starter-test，执行测试时报错：

java.lang.IllegalStateException: Unable to find a @SpringBootConfiguration, you need to use @ContextConfiguration or @SpringBootTest(classes=...) with your test

二、解决方案

将测试类的包名修改与启动类的包名相同
例如：
测试类

package mediacomm;

import mediacomm.pojo.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.web.client.RestTemplate;


@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringCloudTest {
    
    

    @Autowired
    private RestTemplate restTemplate;

    @Test
    public void httpGet(){
    
    
        System.out.println("user = " + restTemplate.getForObject("http://localhost:8181/user/019419091b6440db8b4adb72d85548f2", User.class));
    }
}

springboot启动类

package mediacomm;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
public class mainApp {
    
    

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

    @Bean
    public RestTemplate createTemplate() {
    
    
        return new RestTemplate();               //URLConnetion
    }
}