Spring快速入门代码实现

1.利用IDAE创建一个项目ZSpring.

2.配置pom.xml文件，导入spring坐标。

<?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.lingnan</groupId>
    <artifactId>ZSpring</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
    </dependencies>


</project>

3.创建项目包com.lingnan.dao并在其下面创建UserDao接口

package com.lingnan.dao;

public interface UserDao {
    public void save();
}

4.在com.lingnan.dao.impl下创建一个UserDaoImpl类

package com.lingnan.dao.impl;

import com.lingnan.dao.UserDao;



public class UserDaoImpl implements UserDao {
    public void save() {
        System.out.println("save running....");
    }
}

5.在ZSpringsrcmain esources 新建new一个Spring Config。文件名为applicationContext(名字随意取)并配置其内容，id可以自己取，这里我取userDao,class为UserDaoImpl类的路劲。

<?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="userDao" class="com.lingnan.dao.impl.UserDaoImpl"></bean>
</beans>

6.new一个新的包com.lingnan.demo,创建一个demo类测试。

package com.lingnan.demo;

import com.lingnan.dao.UserDao;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class UserDaoDemo {
    public static void main(String[] args) {
        ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDao userDao = (UserDao) app.getBean("userDao");
        userDao.save();
    }
}

7.测试结果

8.总结Spring开发步骤