五分钟带你快速学习Spring IOC

<bean id="dao" class= "com.yer.UserDao"></bean>

class UserFactory{
    public static UserDao  getDao(){
        String classValue = class属性值 //1.由xml解析
        Class clazz = Class.forName(classValue)//2.通过反射创建
        return (UserDao)clazz.newInstance();
        
    }
}

<bean id="user" class="com.yer.spring5.User"></bean>

<bean id="book" class="com.yer.spring5.Book">
    <property name="bname" value="java一学就会"></property>
    <property name="bname" value="Mysql一学就会"></property>
</bean>

//有参数构造注入属性
<bean id="oders" class="com.yer.spring5.Orders">
        <constructor-arg name="oname" value="小可爱"></constructor-arg>
        <constructor-arg name="address" value="中国"></constructor-arg>
</bean>

xmlns:p="Http://www.springframework.org/schema/p"

<bean id="book" calss="com.yer.spring.Book" p:bname="" p:bauthor=""></bean>

<property name="address">
       <null/>
</property>

<property name="address">
     <value><![CDATA[<<北京>>]]></value>
</property>

public class UserService {
    
    
    //创建UserDao类型属性，生成set方法
    private UserDao userDao;
    
    public void setUserDao(UsesrDao userDao){
        this.userDao = userDao;
        
    }
    public void add(){
        System.out.println("sevice add......")
            //原始方式创建UserDao对象
            //UserDao userDao = new UserDaoImpl();
            //userDao.update();
    }
}

<bean id="userservice" class="com.yer.spring5.service.UserService">
    //注入userDao对象
    //name属性:类里面属性名称
    //ref属性:创建userDao对象bean标签id值 ---userDapimpl
    <property id="userDao" ref="userDapImpl"></property>

</bean>

<bean id="userDaoImpl" class="com.yer.spring5.service.UserDaoImpl">
</bean>

  <bean id="emp" class="com.yer.spring5.bean.Emp">
        <!-- 设置两个普通属性-->
      <property name="ename" value="西西"></property>
      <property name="eage" value="18"></property>
         <!-- 设置对象类型属性-->
      <property name="dept" >
          <bean id="dept" class="com.yer.spring5.Dept">
              <property name="dname" value="金融部"></property>
          </bean>
      </property>

  </bean>

    <!--级联赋值-->
    <bean id="emp" class="com.yer.spring5.bean.Emp">
        <!--     设置两个普通属性-->
        <property name="ename" value="西西"></property>
        <property name="eage" value="18"></property>
        <!--级联赋值-->
        <property name="dept" ref="dept"></property>
    </bean>
    <bean id="dept" class="com.yer.spring5.Dept">
        <property name="dname" value="金融部"></property>
    </bean>

    <!--级联赋值-->
    <bean id="emp" class="com.yer.spring5.bean.Emp">
        <!--     设置两个普通属性-->
        <property name="ename" value="西西"></property>
        <property name="eage" value="18"></property>
        <!--级联赋值-->
        <property name="dept" ref="dept"></property>
        <property name="dept.dname" value="技术部"></property>
    </bean>
    <bean id="dept" class="com.yer.spring5.Dept">
        <property name="dname" value="金融部"></property>
    </bean>
    <!--得到dept的dname属性 ，我们要生成get方法 -->

 <!--数组类型属性注入-->
        <property name="courses">
            <array>
                <value>java</value>
                <value>mysql</value>
            </array>
        </property>

  <!--list类型属性注入-->
        <property name="list">
            <list>
                <value>三三</value>
                <value>四四</value>
            </list>
        </property>

        <!--map类型属性注入-->
        <property name="maps">
            <map>
                <entry key="JAVA" value="java-map"/>
                <entry key="mybatis" value="myBatis-map"/>
            </map>
        </property>

        <!--set类型属性注入-->
        <property name="sets">
            <set>
                <value>mysql</value>
                <value>Redis</value>
            </set>
        </property>

<?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:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
     http://www.springframework.org/schema/util
     http://www.springframework.org/schema/util/spring-util-4.1.xsd">
</beans>

    <!--1、提取list集合类型属性注入-->
    <util:list id="bookList">
        <value>java</value>
        <value>python</value>
        <value>mysql</value>
    </util:list>
    
    <!--2、提取list集合类型属性注入-->
    <bean id="book" class="com.yer.spring5.Book">
        <property name="list" ref="bookList"/>
    </bean>

<bean id= "book" class="com.yer.spring5-1.Book" scope="prototype">
    <property name="list" ref="bookList"></property>
</bean>

<bean id="emp" class="ocom.yer.spring5-1.Emp" autowire="byType">
</bean>

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
             http://www.springframework.org/schema/contexthttp://www.springframewor .org/schema/context/spring-context.xsd">

</bean>

<context:component-scan base-package="con.yer"></context:component-scan>

<!--示例1:
use-default-filters="flase"表示现在不是用默认filter，自己配置filter
context:include-filter,设置去扫描哪些内容-->
<context:component-scan base-package="con.yer" use-default-filters="flase">
    <context:include-filter type="annotation"
                            expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!--示例2：扫描所有内容 context:exclude-filter:设置哪些内容不进行扫描-->
<context:component-scan base-package="con.yer" >
    <context:exclude-filter type="annotation"
              expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

package com.yer.dao;

public interface UserDao {
    void add();
}

package com.yer.dao;
import org.springframework.stereotype.Repository;

@Repository
public class UserDaoImpl implements UserDao{
    @Override
    public void add() {
        System.out.println("UserDaoImpl add...");
    }
}

package com.yer.sevice;
import com.yer.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {
    //定义dao类型属性
    //不需要添加set方法
    //添加注入属性注解
    @Autowired
    private UserDao userDao;

    public  void add(){
        System.out.println("UserService add....");
        userDao.add();
    }
}

<context:conponent-scan base-package="com.yer"></context:conponent-scan>

@Resource(name="userDaoImpl22")
    private UserDao userDao;
    public  void add(){
        System.out.println("UserService add....");
        userDao.add();
    }
}

@Repository(value="userDaoImpl22")
public class UserDaoImpl implements UserDao{
    @Override
    public void add() {
        System.out.println("UserDaoImpl add");
    }
}

@Value( value="月月")
private String name;

package com.yer.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;


@Configuration //作为配置类，代替xml文件
@ComponentScan(basePackages = {"com.yer"})
public class SprinGConfig {
}

package com.yer.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;


@Configuration //作为配置类，代替xml文件
@ComponentScan(basePackages = {"com.yer"})//扫描包
public class SpringConfig {
}

package com.yer.testdemo;
import com.yer.config.SpringConfig;
import com.yer.sevice.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.testng.annotations.Test;

public class TestSpring5 {
    @Test
    public void testService(){
        ApplicationContext context =
//                new ClassPathXmlApplicationContext("bean.xml");
         new AnnotationConfigApplicationContext(SpringConfig.class);
        UserService userService =   
            context.getBean("userService",UserService.class);
        System.out.println(userService);
        userService.add();
    }
}

<dependency>  
  <groupId>org.slf4j</groupId> 
  <artifactId>slf4j-nop</artifactId> 
  <version>1.7.2</version> 
</dependency>

<dependency>  
  <groupId>org.slf4j</groupId> 
  <artifactId>slf4j-nop</artifactId> 
  <version>1.7.2</version> 
</dependency>