Spring学习笔记2:Spring HelloWorld

1:IntelliJ新建Maven工程

2:pom文件加入Spring依赖

<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.test</groupId>

  <artifactId>SpringStack</artifactId>

  <version>1.0-SNAPSHOT</version>

  <packaging>jar</packaging>

  <name>SpringStack</name>

  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <spring.version>4.3.11.RELEASE</spring.version>

  </properties>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <!-- https://mvnrepository.com/artifact/org.testng/testng -->

    <dependency>

      <groupId>org.testng</groupId>

      <artifactId>testng</artifactId>

      <version>6.11</version>

      <scope>test</scope>

    </dependency>

    <!-- 1.Spring核心依赖 -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-core</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-beans</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-context</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <!-- 2.Spring dao依赖 -->

    <!-- spring-jdbc包括了一些如jdbcTemplate的工具类 -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-jdbc</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-tx</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <!-- 3.Spring web依赖 -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-web</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-webmvc</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <!-- 4.Spring test依赖：方便做单元测试和集成测试 -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-test</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-aop</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-orm</artifactId>

      <version>${spring.version}</version>

    </dependency>

  </dependencies>

</project>

3:新建applicationContext.xml

新建resources文件夹，并在resources文件夹下建立applicationContext.xml文件

设置resources文件夹Mark as resources

IntelliJ File->Project Structure

<?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:util="http://www.springframework.org/schema/util"

       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <bean id="HelloNameObject" class="com.test.helloworld.HelloName">

        <property name="name" value="Spring"></property>

    </bean>

</beans>

4:新建HelloName类

public class HelloName {

    private String name;

    public void setName(String name) {

        this.name = name;

    }

    public void hello(){

        System.out.println("Hello:"+name);

    }

}

5:test目录加入测试类HelloNameTest

public class HelloNameTest  {

    @Test

    public void testHelloName() {

        //1:创建Spring IOC容器对象

        //ApplicationContext代表IOC容器

        //ClassPathXmlApplicationContext是ApplicationContext接口的实现类，该实现类从类路径下来加载配置文件

        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

        //2:从IOC容器中获取Bean实例

        //利用id定位IOC容器的Bean

        HelloName nameObject = (HelloName)ctx.getBean("HelloNameObject");

        //HelloName nameObject = ctx.getBean("HelloName");

        //利用类型返回IOC容器中的Bean，但要求IOC容器中，必须只能有一个该类型的Bean

        //3:调用hello()方法

        nameObject.hello();

    }

}

6:项目目录结构