org.springframework.boot spring-boot-starter-data-redis
当加这个配置后，POM.xml的第一行总是报错：
Description Resource Path Location Type
io.lettuce:lettuce-core:jar:6.1.8.RELEASE failed to transfer from https://repo.maven.apache.org/maven2 during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact io.lettuce:lettuce-core:jar:6.1.8.RELEASE from/to central (https://repo.maven.apache.org/maven2): The operation was cancelled.org.eclipse.aether.transfer.ArtifactTransferException: io.lettuce:lettuce-core:jar:6.1.8.RELEASE failed to transfer from https://repo.maven.apache.org/maven2 during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact io.lettuce:lettuce-core:jar:6.1.8.RELEASE from/to central (https://repo.maven.apache.org/maven2): The operation was cancelled.
at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.newException(DefaultUpdateCheckManager.java:225)
at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.checkArtifact(DefaultUpdateCheckManager.java:189)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.gatherDownloads(DefaultArtifactResolver.java:574)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:484)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:402)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:229)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:340)
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:191)
at org.apache.maven.project.DefaultProjectBuilder.resolveDependencies(DefaultProjectBuilder.java:227)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:200)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:124)
看了意思是获取不到最新包，因为maven之前已经下载过，需要删除m2库里的最新玩意，
找到自己仓库，我的是C:\users\ckw\.m2\repository>,
在这个目录下，打开cmd，执行：
for /r %i in (*.lastUpdated) do del %i
执行这个批处理，
删完后，按下面图，update一把就好了
初学SpringBoot
当进行SpringBoot集成Redis时。测试向redis中添加String类型的数据，key=name , value = zlw。
但出现了一下错误：（Whitelabel Error Page）
看控制台输出发现，大致应该是redis没有连接成功。
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 192.168.86.129/
:6379] with root cause
上网搜索了好多这个问题的错误，但好像都没有解决，不是自己的错误，但后来回想到，学习linux的时候，想要连接成功必须要关闭linux的防火墙才行。。。
试一试
可以看到防火墙已经关闭了，
哇~有新发现了，虽然页面还是没有变化，但控制台的信息发生了变化。
提示：
WRONGPASS invalid username-password pair or user is disabled.
这应该是我的redis密码有问题。。
It turned out that my password was in quotation marks
Remember: the quotation marks must be removed from the password! ! !
Remove the double quotes and visit again, success! !
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