SpringIOC组件扫描的Component-scan,用注解配置

创建maven工程

由于创建的maven工程没有test包，可以在src目录下面创建这个包，然后进行相关的测试。


```xml
ApplicationContext.xml的相关的内容：
<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"


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

http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.1.xsd





">

<!-- 如果没有配置上面的http://www.springframework对应的两个选项就会出现下面的异常信息

   3; columnNumber: 52; cvc-complex-type.2.4.c: 通配符的匹配很全面, 但无法找到元素 'context:component-scan' 的声明。-->
    <!--  组件扫描，扫描注解-->
    <context:component-scan base-package="com.zjj"></context:component-scan>



</beans>


pom.xml文件内容：

```xml
<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.zjj</groupId>
  <artifactId>TeacherSpringCompnentScan</artifactId>
  <version>1.0-SNAPSHOT</version>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>6</source>
          <target>6</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13.2</version>
    </dependency>
    <dependency>
      <groupId>xml-apis</groupId>
      <artifactId>xml-apis</artifactId>
      <version>1.3.04</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13.2</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <packaging>war</packaging>


</project>

UserDaoimpl类：

package com.zjj.dao;

import com.zjj.pojo.User;
import org.springframework.stereotype.Repository;

@Repository
public class UserDaoimpl implements  UserDao {
    
    


    @Override
    public boolean addUser() {
    
    


        System.out.println("Userdao.......");

        return true;
    }
}

UserServiceimpl类：

package com.zjj.service;

import com.zjj.dao.UserDaoimpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceimpl implements UserService{
    
    

   @Autowired
    UserDaoimpl userDaoimpl;


    @Override
    public void addUserService() {
    
    
        userDaoimpl.addUser();
        System.out.println("UserServiceimpl.......");
    }
}

还有两个类请自行创建

SpringIOC组件扫描的Component-scan,用注解配置

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