Idea創建Spring項目學習IoC

1. 新建一個Spring項目

我將其命名爲SpringIoC

2. 右鍵src，新建一個Spring的配置文件，命名爲applicationContext.xml，暫時不進行配置

3. 在src下新建一個entity包，一個test包；entity包中包含實體類Student，test包中包含測試會用到的類TestStudent。文件目錄如下：

下面給出Student.java以及TestStudent.java的代碼

Student..java

public class Student {
    private String stuNo;
    private String stuName;
    //省略getter and setter
    //省略toString()
}

TestStudent.java

public class TestStudent {
    public static void main(String[] args) {
        //創建Spring的IoC容器對象
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        try{
            Student student = (Student) applicationContext.getBean("student");
            System.out.println(student.toString());
        }catch (NoSuchBeanDefinitionException e)
        {
            System.out.println(e.getMessage());
            System.out.println(e.getBeanName() + "不存在，請檢查配置文件");
        }
    }
}

在applicationContext.xml中配置Bean

<?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="student" class="entity.Student">
        <property name="stuNo" value="2016211210069"></property>
        <property name="stuName" value="iwaed"></property>
    </bean>
</beans>

運行，結果如下：

done.