SpringIoc容器创建Bean

实体类

public class User {

    private Integer id;
    private String name;
    private String pwd;
    public User() { }
    public User(Integer id, String name, String pwd) {
        this.id = id;
        this.name = name;
        this.pwd = pwd;
    }
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

spring的xml配置文件配置bean

<!--方法设值-->
<bean id="getUser" class="edu.gdkm.po.User">
    <property name="id" value="12"></property>
    <property name="name" value="梁俊"></property>
    <property name="pwd" value="18602003024"></property>
</bean>

<!--构造器设值-->
<bean id="getConUser" class="edu.gdkm.po.User">
    <constructor-arg index="0" name="id" value="321"></constructor-arg>
    <constructor-arg index="1" name="name" value="aagahha"></constructor-arg>
    <constructor-arg index="2" name="pwd" value="13169126919"></constructor-arg>
</bean>

测试类获取bean

 public static void testUserDao(){

    public static void main(String[] args) {
        
 ApplicationContext act = new ClassPathXmlApplicationContext("applicationContext.xml");
        User getConUser = act.getBean("getConUser", User.class);
        System.out.println(getConUser );
        
    }

spring注解注入bean

创建UserController

@Controller
public class UserController {

    @Resource(name = "userService")
    private UserService userService;

    public void test() {
        userService.test();
        System.out.println("UserController被创建");
    }

}

UserDao接口

public interface UserDao {

    void test();
}

UserDao接口实现类

@Repository(value = "userDao")
public class UserDaoImpl implements UserDao {

    @Override
    public void test() {
        System.out.println("userDao被执行");
    }
}

UserService接口

public interface UserService {

    void test();

}

UserService接口实现类

@Service(value = "userService")
public class UserServiceImpl implements UserService {

    @Resource(name = "userDao")
    private UserDao userDao;

    @Override
    public void test() {
        userDao.test();
        System.out.println("userService被创建");
    }
}

测试类测试注解

public class AnnotationAssembleTest {

    public static void main(String[] args) {
        ApplicationContext act = new ClassPathXmlApplicationContext("applicationContext.xml");
        //测试注解
        UserController userController  = act.getBean(UserController.class);
        userController.test();

    }

}