Spring入门案例

实体类
package com.syh.pojo;

public class Team {
    private Integer id;
    private String name;
    private String location;

    public Team(){
        System.out.println("team - 默认的构造方法：id="+id+",name="+name+",location="+location);
    }

    public Team(Integer id, String name, String location) {
        this.id = id;
        this.name = name;
        this.location = location;
        System.out.println("team - 带参的构造方法：id="+id+",name="+name+",location="+location);
    }

    public void init(){
        System.out.println("team - init");
    }

    public void destroy(){
        System.out.println("team - destroy");
    }
}

package com.syh.pojo;

public class MyFactory {

    
    public Team instanceFun(){
        System.out.println("MyFactory--instanceFun");
        return new Team(103,"王五","广州");
    }

    
    public static Team staticFun(){
        System.out.println("MyFactory--staticFun");
        return new Team(104,"赵六","深圳");
    }

    public static void main(String[] args) {
        MyFactory factory = new MyFactory();
        Team t4 = factory.instanceFun();
        Team t5 = MyFactory.staticFun();
    }
}


pom.xml的配置


    4.0.0

    com.syh
    Spring01
    1.0-SNAPSHOT
    
        
        
            junit
            junit
            4.12
            test
        
        
        
            org.springframework
            spring-context
            5.2.13.RELEASE
        
    

    
        
            
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.8.0
                
                    1.8
                    1.8
                    UTF-8
                
            
        
       



创建Spring的配置文件 application.xml
main/resources右键new/XML Configuration File/spring Config




       
       
       
       
       
       
              
              
              
              
       
       
              
              
              
              
       
       
       
       
       
       
       
       



测试类
package com.syh.test;

import com.syh.pojo.Team;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Date;

public class T01 {

    @Test
    public void T01(){
        //原有的写法，程序员自己创建 Team team = new Team();
        //spring容器创建对象的方式
        String springConfig = "application.xml";
        //获取spring容器
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext(springConfig);
        //其他api
        int beanDefinitionCount = applicationContext.getBeanDefinitionCount();
        System.out.println("容器中对象的个数："+beanDefinitionCount);
        System.out.println("容器中对象的名称：");
        String[] beanDefinitionNames = applicationContext.getBeanDefinitionNames();
        for (String name:beanDefinitionNames) {
            System.out.println("t"+name);
        }
        //获取非自定义对象
        Date date = (Date) applicationContext.getBean("date1");
        System.out.println("非自定义对象date:"+date);
    }
}