class path resource [applicationContext.xml] cannot be opened because it does not exist

1.建maven项目

2.在pom中添加依赖

<dependencies>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.0.0.RELEASE</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>4.0.0.RELEASE</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.0.0.RELEASE</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>4.0.0.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>4.0.0.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
  </dependency>
</dependencies>

3.写java接口并实现

public interface TestApi {
    public String test(int num);
}

public class ApiImpl implements TestApi{

    public String test(int num) {
        System.out.println("Api test method, num = " + num);
        return num + "test";
    }
}

4.添加Spring配置文件applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xmlns:tx="http://www.springframework.org/schema/tx"
                xsi:schemaLocation="
                http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
                 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
                 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

                <bean name="api" class="com.blackfish.spring.demo.impl.ApiImpl"></bean>

</beans>

5.编写测试类

public class TestCase {

    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:config/spring/applicationContext.xml");
        TestApi api = (ApiImpl) context.getBean("api");
        String result = api.test(123);
        System.out.println(result);
    }
}

整个项目结构如图：

跑一下testCase，报错：

class path resource [spring/applicationContext.xml] cannot be opened because it does not exist

原因是idea没把resources下的配置文件打包输出。解决办法：

https://blog.csdn.net/sinat_38301574/article/details/80465693#commentBox