配置maven(从下载到spring一条龙)

首先下载：

不要下载太高版本，可能报错

https://maven.apache.org/download.cgi

 

 

 

 

打开高级系统设置中的环境变量：

 

 

 

创建新变量，值就是解压后的maven文件夹；

 

点进Path新建%MAVEN_HOME%\bin\：

 

 

 

 

 

 

 

进入cmd查看是否成功配置 mvn -v：

 

 

 

 

 完成

 

配置仓库：

在下载的maven文件夹的conf文件夹中的settings,xml中配置：

镜像下载源：

<mirror>
        <id>alimaven</id>
        <name>aliyun maven</name>
        <url>https://maven.aliyun.com/repository/public</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
    <mirror>
        <id>alimaven-central</id>
        <name>aliyun maven central</name>
        <url>https://maven.aliyun.com/repository/central</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
    <mirror>
        <id>alimaven-spring</id>
        <name>aliyun maven-spring</name>
        <url>https://maven.aliyun.com/repository/spring</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
    <mirror>
        <id>central</id>
        <name>Maven Repository Switchboard</name>
        <url>https://repo1.maven.org/maven2/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
    <mirror>
        <id>jboss-public-repository-group</id>
        <mirrorOf>central</mirrorOf>
        <name>JBoss Public Repository Group</name>
        <url>http://repository.jboss.org/nexus/content/groups/public</url>
    </mirror>
    <mirror>
        <id>spring-snapshots</id>
        <mirrorOf>central</mirrorOf>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/snapshot</url>
    </mirror>
    <mirror>
        <id>spring-milestones</id>
        <mirrorOf>central</mirrorOf>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
    </mirror>
    <mirror>
      <id>maven-default-http-blocker</id>
      <mirrorOf>external:http:*</mirrorOf>
      <name>Pseudo repository to mirror external repositories initially using HTTP.</name>
      <url>http://0.0.0.0/</url>
      <blocked>true</blocked>
    </mirror>

配置本地仓库 - 自己指定：

 

 

idea创建项目：

 

 

 

https://mvnrepository.com/search?q=spring

中央仓库中找到配置文件

 

 配置好后刷新：

maven会自动将指定jar包的依赖包下载下来：

 

 

然后就是spring的xml配置：

<?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.xsd">
        <bean class="entity.User" id="user"></bean>
</beans>

结构：

User类：

package entity;

import java.util.Objects;

public class User {
    private Integer id;
    private String userName;
    private String realName;

    public Integer getId() {
        return id;
    }

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

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getRealName() {
        return realName;
    }

    public void setRealName(String realName) {
        this.realName = realName;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        User user = (User) o;
        return Objects.equals(id, user.id) && Objects.equals(userName, user.userName) && Objects.equals(realName, user.realName);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, userName, realName);
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", userName='" + userName + '\'' +
                ", realName='" + realName + '\'' +
                '}';
    }
}

测试类：

package test;

import entity.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class IocTest {
    @Test
    public void fun(){
        ApplicationContext app = new ClassPathXmlApplicationContext("spring_ioc.xml");
        User user = app.getBean(User.class);
        System.out.println(user.toString());
    }
}

结果：

成功。