ssm框架

1  首先建立一个接口 UserDao并在其中定义一个方法

public interface UserDao {
	public void run();

}

 2 定义一个实现类

UserDaolmpl.class连接上面的接口

public class UserDaolimp implements UserDao{

	@Override
	public void run() {
		// TODO Auto-generated method stub
		System.out.println("持久层");
		
	}

}

3  建立一个配置文件.xml

4  建一个测试类

public class Test {
	public static void main(String[] args) {
		//加载配置("application.xml" 初始化容器		
		ApplicationContext ac=new ClassPathXmlApplicationContext("application.xml");
		//获取制定的Bean ("userDao"):bean 的id 
		//需要强转一下"(UserDao)
		UserDao aa=(UserDao) ac.getBean("userDao");
		//UserService aa=(UserService) ac.getBean("UseServicelipm");
		aa.run();
		
	}

}

二 服务类 依赖注入

1  首先建立一个接口 UserService并在其中定义一个方法

public interface UserService {
	public void run();

}

 2 定义一个实现类

UserServicelmpl.class连接上面的接口

public class UserServicelmpl implements UserService{
	//Service 想调用 Dao的方法
	public UserDao userdaop;
//设置set为了依赖注入
	public void setUserdaop(UserDao userdaop) {
		this.userdaop = userdaop;
	}

	@Override
	public void run() {
		// TODO Auto-generated method stub
		System.out.println("业务层");
		userdaop.run();
	}
	

}

3  建立一个配置文件.xml

4测试

public class Test {
	public static void main(String[] args) {
		//加载配置("application.xml" 初始化容器		
		ApplicationContext ac=new ClassPathXmlApplicationContext("application.xml");
		//获取制定的Bean ("userDao"):bean 的id 
		//需要强转一下"(UserDao)
		UserService aa=(UserService) ac.getBean("userServicelmpl");
		//UserService aa=(UserService) ac.getBean("UseServicelipm");
		aa.run();
		
	}

}

二 Spring 中的Bean

（一）无参实例化

1 建立一个Bean类

//空类默认继承了 Object类 2 有一个无参的构造方法

public class Bean1 {

}

2建立Bean.xml

3建立一个Test类

public class Test {
	public static void main(String[] args) {
		//1.加载xml配置文件，初始化容器
		String xmlPath="com/qingchneg/ssm/Bean1.xml";
		ApplicationContext ac=new ClassPathXmlApplicationContext(xmlPath);
		//通过容器获取实例对象
		Bean1 bean1=(Bean1) ac.getBean("bean1");
		System.out.println(bean1.toString());
	}

}

（二）静态工厂

public class Bean2 {

}



public class MYBean2Factory {
	public  static Bean2 creatBean2() {
		return new Bean2();
	}
	

}




        
       



import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test1 {
	public static void main(String[] args) {
		//1.加载xml配置文件，初始化容器
		String xmlPath="com/qcby/factory/Bean2.xml";
		ApplicationContext ac=new ClassPathXmlApplicationContext(xmlPath);
		//通过容器获取实例对象
		Bean2 bean2=(Bean2) ac.getBean("bean2");
		System.out.println(bean2.toString());
	}

}

非静态方法

public class Bean3 {

}

public class Bean3Factory {		
	public   Bean3 creatBean3() {
		return new Bean3();
	}	
}



        
        
        




public class Test3 {
	public static void main(String[] args) {
		//1.加载xml配置文件，初始化容器
		String xmlPath="com/qingchneg/ssm/factory/Bean3.xml";
		ApplicationContext ac=new ClassPathXmlApplicationContext(xmlPath);
		//通过容器获取实例对象
		Bean3 bean3=(Bean3) ac.getBean("bean3");
		System.out.println(bean3.toString());
	}

}

作用域

装配方式

基于Annotation的装配

UserDao和UserDaoImpl

public interface UserDao {
	void save()
;
}




import org.springframework.stereotype.Repository;
/*相当于创建了一个id为UserDao的Bean*/
@Repository("userDao")
/*如果上面不写名字则默认的是 开头字母小写的类名*/
public class UserDaolmpl implements UserDao{

	@Override
	public void save() {
		// TODO Auto-generated method stub
		System.out.println("ddad");
		
	}

}

UerSerice和UerSericeImpl

package annotation;

public interface UserService {
	void save ()
;






package annotation;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

@Service("userservice")

public class UserServiceimpl implements UserService{
	/*注入userdao的对象 name 是在userDao中创建的Bean的id*/
	
	@Resource(name="userDao")
	private  UserDao userDao;
	@Override
	public void save() {
		// TODO Auto-generated method stub
		this.userDao.save();
		
	}

usercontrol

import javax.annotation.Resource;
import javax.jws.soap.SOAPBinding.Use;

import org.springframework.stereotype.Controller;

@Controller("userController")
public class UsrContorl {
	@Resource(name="userservice")
	private UserService userService;
	public void save() {
		this.userService.save();
		System.out.println("usercol de  save");
	}
	

}

xml

测试类

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test7 {
	public static void main(String[] args) {
		//1.加载xml配置文件，初始化容器
		String xmlPath="annotation/Bean6.xml";
		ApplicationContext ac=new ClassPathXmlApplicationContext(xmlPath);
		//通过容器获取实例对象
		UsrContorl user1=(UsrContorl) ac.getBean("userController");
		user1.save();
	}

}