项目结构

image.png

# spring-context.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"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="userService" class="com.zq.hello.spring.service.impl.UserServiceImpl" />
</beans>

# pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zq</groupId>
    <artifactId>hello-spring</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.17.RELEASE</version>
        </dependency>
    </dependencies>
</project>

如果maven下载缓慢，可以添加国内镜像

添加国内镜像

#  在settings.xml中的mirrors节点添加如下
 <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
   </mirror>

UserService.java

package com.zq.hello.spring.service;

public interface UserService  {
    public void sayHi();
}

UserServiceImpl.java

package com.zq.hello.spring.service.impl;

import com.zq.hello.spring.service.UserService;

public class UserServiceImpl implements UserService {
    public void sayHi() {
        System.out.println("Hello Spring!");
    }
}

测试代码

public class MyTset {
    public static void main(String[] args) {
      //spring-context.xml的位置是固定的，不能修改
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-context.xml");
        UserService userService = (UserService) applicationContext.getBean("userService");
        userService.sayHi();
    }
}