编写第一个Spring程序—

编写第一个Spring程序——IOC实现

第一个Spring程序 IOC范例

1、新建maven工程

2、在pom.xml文件中导入相关jar包

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>5.2.1.RELEASE</version></dependency><!-- https://mvnrepository.com/artifact/org.springframework/spring-beans --><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>5.2.1.RELEASE</version></dependency><!-- https://mvnrepository.com/artifact/org.springframework/spring-context --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.2.1.RELEASE</version></dependency><!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api --><dependency><groupId>org.junit.jupiter</groupId><artifactId>junit-jupiter-api</artifactId><version>5.6.2</version><scope>test</scope></dependency><!-- https://mvnrepository.com/artifact/junit/junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>compile</scope></dependency>

3、在Package【pojo】下新建一个【Source】类：

package pojo;public class Source {  private String fruit;   // 类型private String sugar;   // 糖分描述private String size;    // 大小杯    /* setter and getter */
}

4、在resources目录下新建一个 applicationContext.xml 文件

<?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 name="source" class="pojo.Source"><property name="fruit" value="橙子"/><property name="sugar" value="多糖"/><property name="size" value="超大杯"/></bean>
</beans>

5、在 Packge【test】下新建一个【TestSpring】类：

package test;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import pojo.Source;public class TestSpring {@Testpublic void test(){ApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"./applicationContext.xml"});Source source = (Source) context.getBean("source");System.out.println(source.getFruit());System.out.println(source.getSugar());System.out.println(source.getSize());}
}