学习maven搭建项目

[spring学习]使用Maven创建spring项目

首先创建好maven项目

image-20200813015937750
image-20200813015937750
image-20200813020006681
image-20200813020006681

创建好项目之后，项目结构为这样：

image-20200813020047039
image-20200813020047039

配置pom.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
<dependencies>
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.3.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.0.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/junit/junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13</version>
    </dependency>

</dependencies>

此时右键项目，创建spring配置文件

image-20200813020240370
image-20200813020240370

创建Java文件

目录结构如下：

image-20200813020412369
image-20200813020412369
HelloWorldDao.java
1
2
3
4
5
package com.spring.dao;

public interface HelloWorldDao {
    public void sayHello();
}
HelloWorldDaoImpl.java
1
2
3
4
5
6
7
8
9
package com.spring.dao.impl;

import com.spring.dao.HelloWorldDao;

public class HelloWorldDaoImpl implements HelloWorldDao {
    public void sayHello() {
        System.out.println("Spring say Hello World！");
    }
}
HelloWorldService.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
package com.spring.service;

import com.spring.dao.HelloWorldDao;

public class HelloWorldService {
    HelloWorldDao helloWorldDao;

    public HelloWorldDao getHelloWorldDao() {
        return helloWorldDao;
    }

    public void setHelloWorldDao(HelloWorldDao helloWorldDao) {
        this.helloWorldDao = helloWorldDao;
    }
}
spring-config.xml
1
2
3
4
<bean id="HelloWorldDao" class="com.spring.dao.impl.HelloWorldDaoImpl" />
<bean id="HelloWorldService" class="com.spring.service.HelloWorldService" >
    <property name="helloWorldDao" ref="HelloWorldDao"/>
</bean>
测试Spring
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
package com.spring.app;

import com.spring.dao.HelloWorldDao;
import com.spring.service.HelloWorldService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringTest {
    @Test
    public void sayHello(){
        ApplicationContext ac = new ClassPathXmlApplicationContext("spring-conf.xml");
        HelloWorldService service = (HelloWorldService) ac.getBean("HelloWorldService");
        HelloWorldDao dao = service.getHelloWorldDao();
        dao.sayHello();
    }
}

运行结果：

1
2
3
4
5
6
7
8
八月 13, 2020 1:26:37 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@4ae82894: startup date [Thu Aug 13 01:26:37 CST 2020]; root of context hierarchy
八月 13, 2020 1:26:37 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-conf.xml]
Spring say Hello World！
Disconnected from the target VM, address: '127.0.0.1:65062', transport: 'socket'

Process finished with exit code 0