如何强制maven更新?

我将我已经工作的项目导入到另一台计算机上，它开始下载依赖项。

显然我的网络连接崩溃了，现在我得到了以下信息:

    >Build errors for comics; org.apache.maven.lifecycle.LifecycleExecutionException:
    Failed to execute goal on project comicsTest: Could not resolve dependencies for project comicsTest:comicsTest:war:0.0.1-SNAPSHOT:
    The following artifacts could not be resolved:
    org.springframework:spring-context:jar:3.0.5.RELEASE,
    org.hibernate:hibernate-entitymanager:jar:3.6.0.Final,
    org.hibernate:hibernate-core:jar:3.6.0.Final,
    org.hibernate:hibernate-commons-annotations:jar:3.2.0.Final,
    org.aspectj:aspectjweaver:jar:1.6.8,
    commons-lang:commons-lang:jar:2.5,

    >mysql:mysql-connector-java:jar:5.1.13: Failure to transfer org.springframework:spring-context:jar:3.0.5.RELEASE from http://repo1.maven.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced.

    >Original error: Could not transfer artifact org.springframework:spring-context:jar:3.0.5.RELEASE from central (http://repo1.maven.org/maven2): No response received after 60000

如何强制maven更新?

当前回答

如果你的本地存储库在某种程度上为发布jar而不是快照(-U和——update-snapshots只更新快照)搞砸了，你可以使用以下命令清除本地回购:

 mvn dependency:purge-local-repository

然后你可能想要清理并重新安装:

 mvn dependency:purge-local-repository clean install

更多信息请访问https://maven.apache.org/plugins/maven-dependency-plugin/examples/purging-local-repository.html

2015-11-26 02:46:39

其他回答

mvn clean install -U

-U表示强制更新快照依赖项。

如果之前从未成功下载过发布依赖项，则将以这种方式更新。裁判:https://stackoverflow.com/a/29020990/32453

2012-03-14 08:06:29

-U似乎强制更新所有快照依赖项。

如果你想在没有clean或-U的情况下更新单个依赖，你可以从本地repo中删除它，然后构建。

下面的例子用于更新slf4j-api 1.7.1-SNAPSHOT:

rm -rf ~/.m2/repository/org/slf4j/slf4j-api/1.7.1-SNAPSHOT
mvn compile

2013-03-11 10:31:31

以前版本的maven在mvn clean install中使用-U时不强制检查丢失的版本，只检查快照，但新版本支持这一点。

对于那些还在为以前的版本而挣扎的人来说，下面的内容可能会有所帮助

在Windows上:

cd %userprofile%\.m2\repository
for /r %i in (*.lastUpdated) do del %i

在Linux上:

find ~/.m2  -name "*.lastUpdated" -exec grep -q "Could not transfer" {} \; -print -exec rm {} \;

每当maven由于任何原因(连通性/不存在等)无法下载依赖项时，它将添加“。错误=不能转移工件"在依赖项名称。lastUpdate文件在$home/下的相应文件夹。m2目录。删除这些文件将迫使maven再次尝试获取依赖项。

2019-11-28 11:00:21

What maven does is, it downloads all your project's dependencies into your local repo (.m2 folder). Because of the internet causing issues with your local repo, you project is facing problems. I am not sure if this will surely help you or not but you can try deleting all the files within the repository folder inside the .m2 folder. Since there would be nothing in the local repo, maven would be forced to download the dependencies again, thus forcing an update. Generally, the .m2 folder is located at c:users:[username]:.m2

2019-04-17 17:12:47

我试了这里所有的答案，但似乎都不管用。重启我的电脑，然后运行mvn clean install -U。这解决了我的问题。

2019-02-25 09:29:49

如何强制maven更新?

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