Spring

1.School类

package top.wyyblog.DI5;

public class School {

 private String name;  

public void setName(String name) {

  this.name = name; 

}

 @Override 

public String toString() { 

 return "School [name=" + name + "]"; 

}

}

2.Student类

package top.wyyblog.DI5;

public class Student { 

private String name; 

private int age; 

private School school;

 public Student() {

 }

 public void setName(String name) { 

 this.name = name;

 }  

public void setAge(int age) { 

 this.age = age;

 }

 public void setSchool(School school) { 

 this.school = school;

 }  

@Override

 public String toString() { 

 return "Student [name=" + name + ", age=" + age + ", school=" + school + "]"; 

}

}

3.测试类

package top.wyyblog.DI5;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestDemo {

 public static void main(String[] args) {  

ApplicationContext context = new ClassPathXmlApplicationContext("top/wyyblog/DI5/applicationContext.xml");  

Student student = (Student) context.getBean("student");  

System.out.println(student); 

}

}

4.自动注入(applicationContext.xml配置文件)

        （a）. byName自动注入

<bean id="school" class="top.wyyblog.DI5.School">  

<property name="name" value="极速学院">

</property>

 </bean> 

<!-- autowire="byName"会从容器中查找与实体类的域属性同名的Bean 的id，   并将该Bean对象自动注入给该域属性 -->   

<bean id="student" class="top.wyyblog.DI5.Student" autowire="byName"> 

    <property name="name" value="李四">

</property>     

<property name="age" value="80">

</property>   

</bean>

 （b）. byType自动注入

<bean id="school2" class="top.wyyblog.DI6.School"> 

 <property name="name" value="极速学院">

</property>

 </bean>

 <!-- autowire="byType"会从容器中查找与实体类的域属性类型具有 is-a 关系的Bean，   并将该Bean对象自动注入给该域属性 -->   

<bean id="student" class="top.wyyblog.DI6.Student" autowire="byType">   

 <property name="name" value="李四">

</property>   

 <property name="age" value="80"></property>  

  </bean>

一)静态代理： 

1.Count.java

<span style="font-size:16px;">package net.battier.dao;
/**
 * 定义一个账户接口
 *
 * @author Administrator
 *
 */
public interface Count {
    // 查看账户方法
    public void queryCount();
    // 修改账户方法
    public void updateCount();
}   </span>

2.CountImpl.java

package net.battier.dao.impl;
import net.battier.dao.Count;
/**
 * 委托类(包含业务逻辑)
 *
 * @author Administrator
 *
 */
public class CountImpl implements Count {
    @Override
    public void queryCount() {
        System.out.println("查看账户方法...");
    }
    @Override
    public void updateCount() {
System.out.println("修改账户方法...");
    }
}