一 最新解决方案——针对2020版本
1 证书跳过配置
参考:https://blog.csdn.net/m764395448/article/details/105496274
-Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true -Dmaven.wagon.http.ssl.ignore.validity.dates=true
下面两个地方需要配置。
2 换阿里最新镜像
参考:https://www.cnblogs.com/JaxYoun/p/12699291.html
<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<!-- 本地仓库目录 -->
<localRepository>D:\mvn_repo</localRepository>
<pluginGroups>
</pluginGroups>
<proxies>
</proxies>
<servers>
</servers>
<!--拷贝mirrors节点下的全部内容-->
<mirrors>
<mirror>
<id>aliyun-public</id>
<mirrorOf>*</mirrorOf>
<name>aliyun public</name>
<url>https://maven.aliyun.com/repository/public</url>
</mirror>
<mirror>
<id>aliyun-central</id>
<mirrorOf>*</mirrorOf>
<name>aliyun central</name>
<url>https://maven.aliyun.com/repository/central</url>
</mirror>
<mirror>
<id>aliyun-spring</id>
<mirrorOf>*</mirrorOf>
<name>aliyun spring</name>
<url>https://maven.aliyun.com/repository/spring</url>
</mirror>
<mirror>
<id>aliyun-spring-plugin</id>
<mirrorOf>*</mirrorOf>
<name>aliyun spring-plugin</name>
<url>https://maven.aliyun.com/repository/spring-plugin</url>
</mirror>
<mirror>
<id>aliyun-apache-snapshots</id>
<mirrorOf>*</mirrorOf>
<name>aliyun apache-snapshots</name>
<url>https://maven.aliyun.com/repository/apache-snapshots</url>
</mirror>
<mirror>
<id>aliyun-google</id>
<mirrorOf>*</mirrorOf>
<name>aliyun google</name>
<url>https://maven.aliyun.com/repository/google</url>
</mirror>
<mirror>
<id>aliyun-gradle-plugin</id>
<mirrorOf>*</mirrorOf>
<name>aliyun gradle-plugin</name>
<url>https://maven.aliyun.com/repository/gradle-plugin</url>
</mirror>
<mirror>
<id>aliyun-jcenter</id>
<mirrorOf>*</mirrorOf>
<name>aliyun jcenter</name>
<url>https://maven.aliyun.com/repository/jcenter</url>
</mirror>
<mirror>
<id>aliyun-releases</id>
<mirrorOf>*</mirrorOf>
<name>aliyun releases</name>
<url>https://maven.aliyun.com/repository/releases</url>
</mirror>
<mirror>
<id>aliyun-snapshots</id>
<mirrorOf>*</mirrorOf>
<name>aliyun snapshots</name>
<url>https://maven.aliyun.com/repository/snapshots</url>
</mirror>
<mirror>
<id>aliyun-grails-core</id>
<mirrorOf>*</mirrorOf>
<name>aliyun grails-core</name>
<url>https://maven.aliyun.com/repository/grails-core</url>
</mirror>
<mirror>
<id>aliyun-mapr-public</id>
<mirrorOf>*</mirrorOf>
<name>aliyun mapr-public</name>
<url>https://maven.aliyun.com/repository/mapr-public</url>
</mirror>
</mirrors>
<profiles>
</profiles>
</settings>
二 Could not transfer artifact 报错
1 问题现象
pom.xml文件的project上报错Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.5.4.RELEASE
2 解决方法
命令行 cd 到项目路径下使用mvn complile编译后,右键项目 maven -> reimport 即可。
3 通过脚本删除
参考:https://blog.csdn.net/m0_37138008/article/details/104428616
import java.io.File;
import java.io.IOException;
//列出File的一些常用操作
public class Test {
/**
* 遍历指定目录下(包括其子目录)的所有文件,并删除以 lastUpdated 结尾的文件
* @param dir 目录的位置 path
* @throws IOException
*/
public static void listDirectory(File dir) throws IOException {
if (!dir.exists())
throw new IllegalArgumentException("目录:" + dir + "不存在.");
if (!dir.isDirectory()) {
throw new IllegalArgumentException(dir + " 不是目录。");
}
File[] files = dir.listFiles();
if (files != null && files.length > 0) {
for (File file : files) {
if (file.isDirectory())
//递归
listDirectory(file);
else{ // 删除以 lastUpdated 结尾的文件
String fileName = file.getName();
boolean isLastupdated = fileName.toLowerCase().endsWith("lastupdated");
if (isLastupdated){
boolean is_delete = file.delete();
System.out.println("删除的文件名 => " + file.getName() + " || 是否删除成功? ==> " + is_delete);
}
}
}
}
}
public static void main(String[] args) throws IOException {
// 指定maven的本地仓库
listDirectory(new File("D:\\.m2\\repos"));
}
}
三 cannot resolve 报错
1 Maven设置中的Work offline不要勾选
https://blog.csdn.net/weixin_39972720/article/details/105734167
2 通用解决方案
https://blog.csdn.net/jwcxs_m/article/details/80076909
https://blog.csdn.net/qq_36323559/article/details/97266998
3 使用正确的阿里云的镜像
<mirrors>
<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>
</mirrors>
4 修改阿里云配置
原来配置
<mirror>
<id>nexus-aliyun</id>
<mirrorOf>central</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>
替换为
<mirror>
<id>nexus-aliyun</id>
<mirrorOf>*</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>
https://blog.csdn.net/u014340331/article/details/103367890
四 下载下来了,还报错,有两种解决方案
方案1:把pom.xml中对应的依赖先删除,然后刷新右侧,之后再把依赖粘贴到pom.xml中,再次刷新右侧就好了。
方案2:从本地仓库将对应的包删除掉,然后让maven重新下载。
参考:https://blog.csdn.net/u010003835/article/details/78480626
五 参考
1 仓库的基本概念
https://www.runoob.com/maven/maven-repositories.html
2 repositories、pluginRepository的作用
https://blog.csdn.net/sinat_32759831/article/details/83141296
https://segmentfault.com/a/1190000020998920?utm_source=tag-newest
3 POM中repositories、pluginRepository的标准配置
<repositories>
<repository>
<id>aliyun</id>
<url>https://maven.aliyun.com/repository/public</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>aliyun-plugin</id>
<url>https://maven.aliyun.com/repository/public</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>