如何用IDEA 2020.1进行maven配置？

代码如下：
TestDI.java:

package com.itheima.ioc;
import org.springframework.context.ApplicationContext;
import 
    org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestDI {
    public static void main(String[] args) {
        ApplicationContext applicationContext = 
             new ClassPathXmlApplicationContext("applicationContext.xml");
        UserService userService = 
            (UserService) applicationContext.getBean("userService");
        userService.say();
    }
}

UserDao.java:

package com.itheima.ioc;
public interface UserDao {
    public void say();
}

TestIoC.java:

package com.itheima.ioc;
import org.springframework.context.ApplicationContext;
import 
    org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestIoC {
    public static void main(String[] args) {
        ApplicationContext applicationContext = 
            new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDao userDao = (UserDao) applicationContext.getBean("userDao");
        userDao.say();
    }
}

UserDaoImpl.java:

package com.itheima.ioc;
public class UserDaoImpl implements UserDao {
    public void say() {
        System.out.println("userDao say hello World !");
    }
}

UserService.java:

package com.itheima.ioc;
public interface UserService {
    public void say();
}

UserServiceImpl.java:

package com.itheima.ioc;
public class UserServiceImpl implements UserService {
    private UserDao userDao;
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }
    public void say() {
        this.userDao.say();
        System.out.println("userService say hello World !");
    }
}

applicationContext.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd"> 
    <bean id="userdao" class="com.wxy.UserDaoImpl"></bean>
    <bean id="userService" class="com.wxy.UserServiceImpl">
        <property name="userDao" ref="userdao"></property>
    </bean>    
</beans>

pom.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>org.example</groupId>
    <artifactId>ch1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
       </dependency>
   </dependencies>
</project>

用IDEA 2020.1配置maven项目时，报错：Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:3.1 from/to alimaven (http://maven.aliyun.com/repository/central): C:\Program Files\Users\.m2\repository\org\apache\maven\plugins\maven-compiler-plugin\3.1\maven-compiler-plugin-3.1.pom.part.lock (拒绝访问。)

看你使用的软件是idea 在设置中搜索maven 在这三个地方配置好你的maven位置

点击File

点击

清空缓存
然后他会自动重启idea 重新下载依赖， 你可能是依赖下载丢失了