Sping入门-IOC(控制翻转)/DI(依赖输入)--基本类型输入

基本类型输入

实体类文件（student.java）

package laogao.com;

public class student {
    private int id;
    private String name;
    private String age;
    
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public student() {
        
    }
    public student(int id, String name, String age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }
    public student(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "student [id=" + id + ", name=" + name + ", age=" + age + "]";
    }

}

 xml文件内容（ApplicationContext.xml）

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE beans PUBLIC 
    "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
    <bean id="s1" class="laogao.com.student"> <!-- 这里bean相当于student s1 = new student(); -->
        <property name="id"><!-- 这里相当于 s1.setID=(2) -->
            <value>2</value>
        </property>
        <property name="name"><!-- 这里相当于 s1.setNAME=("lisi") -->
            <value>lisi</value>
        </property>
        <property name="age"><!-- 这里相当于 s1.setAGE=(90) -->
            <value>90</value>
        </property>
        
    </bean>
    
    <bean id="s2" class="laogao.com.student">
        <property name="id">
            <value>2</value>
        </property>
        
        
        <constructor-arg index="0"> <!-- 这里相当于 s1.setNAME=("sb") 但是必须有单独name的构建方法 -->
            <value>sb</value>
        </constructor-arg> 
        
        <property name="age">
            <value>90</value>
        </property>
    
    </bean>
    
</beans>

测试文件（Test.java）

package laogao.com;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
    public static void main(String[] args) {
        //接值ApplicationContext.xml
        
        ApplicationContext context = new ClassPathXmlApplicationContext("/ApplicationContext.xml");
          //（student）是类型强转
        student bean = (student)context.getBean("s1");
        
        System.out.println(bean.toString());
        student bean2 = (student)context.getBean("s2");
        System.out.println(bean2.toString());
    }

}