第一步：引入jar包（这里是在前面的基础上添加的，就是多引入一个aop的jar包）
第二步：配置文件引入约束（context约束）
这个约束是注解开发所必须的
xmlns:context="http://www.springframework.org/schema/context"
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
</beans>第三步：配置注解包扫描（扫描哪些包下的注解）
<context:component-scan base-package="com.ctbu"/>第四步：在类上和属性上写上注解
@Component("student") //相当于是配置文件中配置时 bean中的id属性
public class Student {
private String name;
private String age;
private String sex;
public String getName() {
return name;
}
@Value("花木兰") //相当于是配置文件中配置的时候，属性的注入
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
@Value("23")
public void setAge(String age) {
this.age = age;
}
public String getSex() {
return sex;
}
@Value("女")
public void setSex(String sex) {
this.sex = sex;
}
@Override
public String toString() {
return "Student{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
", sex='" + sex + '\'' +
'}';
}
}
第五步：编写测试类
@Test
public void test2(){
//加载配置文件
ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
//获取配置的对象，通过配置文件中的id
Student student = (Student) applicationContext.getBean("student");
System.out.println(student);
}