参考博文：https://blog.csdn.net/wangjin890620/article/details/101363943
错误提示
IDEA中导入 Maven 项目或者 Maven 项目切换分支后，提示：Unable to import maven project: See logs for details
1. 从 Help>>show Log in Explorer 打开日志
2. 报错信息
若报错堆栈信息如下：需要修改 MAVEN的 Importing和Runner的JDK一致。
2019-09-24 15:54:53,177 [79997751] ERROR - #org.jetbrains.idea.maven - IntelliJ IDEA 2018.3 Build #IU-183.4284.148
2019-09-24 15:54:53,177 [79997751] ERROR - #org.jetbrains.idea.maven - JDK: 1.8.0_152-release; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o
2019-09-24 15:54:53,177 [79997751] ERROR - #org.jetbrains.idea.maven - OS: Windows 10
2019-09-24 15:54:54,060 [79998634] INFO - .diagnostic.PerformanceWatcher - Reindexing refreshed files took 1279ms; general responsiveness: ok; EDT responsiveness: ok
2019-09-24 15:54:54,187 [79998761] INFO - g.FileBasedIndexProjectHandler - Reindexing refreshed files: 0 to update, calculated in 0ms
2019-09-24 15:55:31,582 [80036156] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:02:39,691 [80464265] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:02:44,386 [80468960] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:03:24,203 [80508777] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:03:31,740 [80516314] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:05:31,587 [80636161] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:12:39,637 [81064211] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:12:44,454 [81069028] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:13:24,083 [81108657] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:13:31,845 [81116419] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:15:31,596 [81236170] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:22:39,644 [81664218] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:22:44,358 [81668932] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:23:24,097 [81708671] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:23:31,756 [81716330] ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:24:34,611 [81779185] INFO - atisticsWhiteListGroupsService - Request failed with status code 404
com.intellij.util.io.HttpRequests$HttpStatusException: Request failed with status code 404. Status=404, Url=https://download.jetbrains.com/fus/whitelist/bear/groups/IU.json
at com.intellij.util.io.HttpRequests.throwHttpStatusError(HttpRequests.java:643)
at com.intellij.util.io.HttpRequests.openConnection(HttpRequests.java:624)
at com.intellij.util.io.HttpRequests.access$300(HttpRequests.java:59)
at com.intellij.util.io.HttpRequests$RequestImpl.getConnection(HttpRequests.java:378)
at com.intellij.util.io.HttpRequests$RequestImpl.getInputStream(HttpRequests.java:387)
at com.intellij.util.io.HttpRequests$RequestImpl.readString(HttpRequests.java:442)
at com.intellij.util.io.RequestBuilder.lambda$readString$3(RequestBuilder.java:85)
at com.intellij.util.io.HttpRequests.doProcess(HttpRequests.java:523)
at com.intellij.util.io.HttpRequests.process(HttpRequests.java:499)
at com.intellij.util.io.HttpRequests.access$100(HttpRequests.java:59)
at com.intellij.util.io.HttpRequests$RequestBuilderImpl.connect(HttpRequests.java:352)
at com.intellij.util.io.RequestBuilder.readString(RequestBuilder.java:85)
at com.intellij.internal.statistic.service.fus.FUStatisticsWhiteListGroupsService.getApprovedGroups(FUStatisticsWhiteListGroupsService.java:46)
at com.intellij.internal.statistic.service.fus.FUStatisticsSettingsService.getApprovedGroups(FUStatisticsSettingsService.java:43)
at com.intellij.internal.statistic.service.fus.collectors.FUStatisticsPersistence.persistProjectUsages(FUStatisticsPersistence.java:49)
at com.intellij.internal.statistic.updater.StatisticsJobsScheduler$2.lambda$projectOpened$0(StatisticsJobsScheduler.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)