spring02:DI(依赖注入)
文章目录
- spring02:DI(依赖注入)
- 前言:
- 一、构造器注入(constructor)
- 二、set注入:
- 分析:
- 1. Student类:
- 2. Address类:
- 3. beans.xml:
- 4. MyTest:
- 三、拓展方式注入:p命名空间 和 c命名空间(property和constructor)
- 分析:
- 1. User类:
- 2. UserBean.xml:
- 总结
前言:
提示:以下是本篇文章正文内容:
一、构造器注入(constructor)
二、set注入:
分析:
1. Student类:
2. Address类:
public class Address {private String address;public Address() {}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "Address{" +"address='" + address + '\'' +'}';}
}
3. beans.xml:
4. MyTest:
public class MyTest {public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");Student stu = (Student) context.getBean("student");System.out.println(stu.toString());
/*Student{name='胡潇',address=Address{address='内蒙古工业大学'},books=[西游记, 三国演义, 水浒传, 红楼梦],hobbys=[听歌, 敲代码, 敲代码],cards={身份证=1234568876789876543,银行卡=1234567876543212345623},games=[LOL, BOB, QAQ],info={学号=20191800074,url=男,username=胡潇},wife='null'}
*/}
}
三、拓展方式注入:p命名空间 和 c命名空间(property和constructor)
分析:
1. User类:
public class User {private String name;private int age;public User() {}public User(String name, int age) {this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}@Overridepublic String toString() {return "User{" +"name='" + name + '\'' +", age=" + age +'}';}
}
2. UserBean.xml:
总结
提示:这里对文章进行总结:
💕💕💕