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今日在做maven项目部署时出现了这样一个错误，开始时不得要领总以为某个plugin找不到了或是版本不对：
于是重装maven。。。
mvn -install -e
后来查看%MAVEN_HOME%/conf/settings.xml时发现：
&localRepository&E:/local_repo/repository&/localRepository&中指向的目录出了问题（原来目录放在.m2中的后来给挪了一下位置，也许是覆盖掉的吧，谁知道？），
于是将其改为%MAVEN_HOME%/.m2/repository
问题解决！
总结一下：
1. 确保正确安装maven。（通常跳过此步。。。）。
2. 确保相关的环境变量存在（M2_HOME、 MAVEN_HOME等）。
3. 确保settings.xml中的库目录指向正确的地址。
4. 如果还是不行就完全删掉maven，然后参照第1条。
相关信息：
+ Error stacktraces are turned on.[INFO] Scanning for projects...[INFO] ------------------------------------------------------------------------[INFO] Building dongao Bussiness Operation Support System[INFO]
task-segment: [install][INFO] ------------------------------------------------------------------------[INFO] ------------------------------------------------------------------------[ERROR] BUILD ERROR[INFO] ------------------------------------------------------------------------[INFO] The plugin 'org.apache.maven.plugins:maven-resources-plugin' does not exist or no valid version could be found[INFO] ------------------------------------------------------------------------[INFO] Traceorg.apache.maven.lifecycle.LifecycleExecutionException: The plugin 'org.apache.maven.plugins:maven-resources-plugin' does not exist or no valid version could be found
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1286)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1522)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindLifecycleForPackaging(DefaultLifecycleExecutor.java:1016)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:980)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:458)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:333)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:282)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)Caused by: org.apache.maven.plugin.version.PluginVersionNotFoundException: The plugin 'org.apache.maven.plugins:maven-resources-plugin' does not exist or no valid version coulde found
at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:229)
at org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:91)
at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:167)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1257)
... 18 more[INFO] ------------------------------------------------------------------------[INFO] Total time: & 1 second[INFO] Finished at: Tue Mar 10 16:11:26 CST 2009[INFO] Final Memory: 1M/3M[INFO] ------------------------------------------------------------------------
为了方便找错，通常在使用maven的时候都是离线模式（当然第一次安装要在线的，除非你又本地库了）加错误输出，比如：
mvn package -e -o -Dmaven.test.skip=true 将某个工程编译打包
-e --errors：打开错误输出
-o --offline：离线模式
当然还有：-h 那个就是帮助了。
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可以参考最新的文档：如何在eclipse jee中检出项目并转 ...
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非常不错,:idea: ,感谢楼主
好……一定好好研究查看:10493|回复：5
&&刚开始学了一下maven，但是在创建maven 项目时，出现这个问题：com.thoughtworks.xstream.io.HierarchicalStreamDriver
clean install的时候出现这个问题：
[INFO] Scanning for projects...
[WARNING] Some problems were encountered while building the effective model for sjg.sshe:sshe:war:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 22, column 15
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[INFO]& && && && && && && && && && && && && && && && && && && && && && && && &
[INFO] ------------------------------------------------------------------------
[INFO] Building&&0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ sshe ---
[INFO] Deleting D:\Java\MyEclipseforSpring\Workspaces\sshe\target
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ sshe ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\Java\MyEclipseforSpring\Workspaces\sshe\src\main\resources
[INFO] --- maven-compiler-plugin:2.5.1:compile (default-compile) @ sshe ---
[INFO] Nothing to compile - all classes are up to date
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ sshe ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\Java\MyEclipseforSpring\Workspaces\sshe\src\test\resources
[INFO] --- maven-compiler-plugin:2.5.1:testCompile (default-testCompile) @ sshe ---
[INFO] No sources to compile
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ sshe ---
[INFO] No tests to run.
[INFO] --- maven-war-plugin:2.2:war (default-war) @ sshe ---
[WARNING] Error injecting: org.apache.maven.plugin.war.WarMojo
com.google.inject.ProvisionException: Guice provision errors:
1) Error injecting constructor, java.lang.NoClassDefFoundError: com/thoughtworks/xstream/io/HierarchicalStreamDriver
&&at org.apache.maven.plugin.war.WarMojo.&init&(Unknown Source)
&&while locating org.apache.maven.plugin.war.WarMojo
at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1006)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1032)
at org.eclipse.sisu.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:44)
at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:86)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:55)
at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
at org.eclipse.sisu.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:134)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:109)
at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:47)
at com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:997)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1047)
at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:993)
at com.google.inject.Scopes$1$1.get(Scopes.java:59)
at org.eclipse.sisu.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:82)
at org.eclipse.sisu.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:52)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:259)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:251)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:459)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:97)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:318)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:153)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:414)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:357)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
Caused by: java.lang.NoClassDefFoundError: com/thoughtworks/xstream/io/HierarchicalStreamDriver
at org.apache.maven.plugin.war.AbstractWarMojo.&init&(AbstractWarMojo.java:316)
at org.apache.maven.plugin.war.WarMojo.&init&(WarMojo.java:49)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:86)
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:109)
at com.google.inject.internal.ConstructorInjector.access$000(ConstructorInjector.java:32)
at com.google.inject.internal.ConstructorInjector$1.call(ConstructorInjector.java:92)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:116)
at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:269)
at com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:997)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1054)
at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:993)
... 42 more
Caused by: java.lang.ClassNotFoundException: com.thoughtworks.xstream.io.HierarchicalStreamDriver
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 60 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.696s
[INFO] Finished at: Fri Sep 20 13:44:59 CST 2013
[INFO] Final Memory: 9M/118M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project sshe: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.2:war failed: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:2.2'. A required class is missing: com/thoughtworks/xstream/io/HierarchicalStreamDriver
[ERROR] -----------------------------------------------------
[ERROR] realm =& & plugin&org.apache.maven.plugins:maven-war-plugin:2.2
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/F:/Java/maven/repository/org/apache/maven/plugins/maven-war-plugin/2.2/maven-war-plugin-2.2.jar
[ERROR] urls[1] = file:/F:/Java/maven/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar
[ERROR] urls[2] = file:/F:/Java/maven/repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar
[ERROR] urls[3] = file:/F:/Java/maven/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar
[ERROR] urls[4] = file:/F:/Java/maven/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar
[ERROR] urls[5] = file:/F:/Java/maven/repository/org/apache/maven/maven-archiver/2.5/maven-archiver-2.5.jar
[ERROR] urls[6] = file:/F:/Java/maven/repository/org/codehaus/plexus/plexus-io/2.0.2/plexus-io-2.0.2.jar
[ERROR] urls[7] = file:/F:/Java/maven/repository/org/codehaus/plexus/plexus-archiver/2.1/plexus-archiver-2.1.jar
[ERROR] urls[8] = file:/F:/Java/maven/repository/org/codehaus/plexus/plexus-interpolation/1.15/plexus-interpolation-1.15.jar
[ERROR] urls[9] = file:/F:/Java/maven/repository/junit/junit/3.8.1/junit-3.8.1.jar
[ERROR] urls[10] = file:/F:/Java/maven/repository/com/thoughtworks/xstream/xstream/1.3.1/xstream-1.3.1.jar
[ERROR] urls[11] = file:/F:/Java/maven/repository/xpp3/xpp3_min/1.1.4c/xpp3_min-1.1.4c.jar
[ERROR] urls[12] = file:/F:/Java/maven/repository/org/codehaus/plexus/plexus-utils/3.0/plexus-utils-3.0.jar
[ERROR] urls[13] = file:/F:/Java/maven/repository/org/apache/maven/shared/maven-filtering/1.0-beta-2/maven-filtering-1.0-beta-2.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import&&from realm ClassRealm[maven.api, parent: null]]
[ERROR] -----------------------------------------------------: com.thoughtworks.xstream.io.HierarchicalStreamDriver
[ERROR] -& [Help 1]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1]
请大侠帮帮忙，这个问题在网上确实找不到解决的方法，如何办呢》？都有两天了，呜呜
(39.13 KB)
晕。。看着就烦。。。
天天好心情~~~
引用:原帖由 yuke198907 于
14:21 发表
类不存在... 我在一些视频里看到的，他们都可以直接创建而且没问题，但是我这里就出现问题了，不知道是怎么回事，知道怎么解决吗
引用:原帖由 yuke198907 于
17:43 发表
按照Maven插件了么 不用了吧，我安装的是MyEclipse for Spring这个IDE的，应该有集成吧，如果我改为打包成jar 就可以正常的运行，打war 就出现上面的错误。
遇到同样问题，请楼主赐教
我也遇到同样的问题问题对人有帮助，内容完整，我也想知道答案
问题没有实际价值，缺少关键内容，没有改进余地
Unknown lifecycle phase "–Dmaven.test.skip=true". You must specify a valid lifecycle phase or a goal in the format &plugin-prefix&:&goal& or &plugin-group-id&:&plugin-artifact-id&[:&plugin-version&]:&goal&. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -& [Help 1]
答案对人有帮助，有参考价值
答案没帮助，是错误的答案，答非所问
mvn clean install -Dmaven.test.skip=true
答案对人有帮助，有参考价值
答案没帮助，是错误的答案，答非所问
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首先检查父项目,子项目的jdk版本是否一致,编码格式是否一致我的问题就错在了编码格式上,父项目用的是UTF-8,子项目新建的,默认GBK这时,使用maven install命令出错提示:[INFO] pims.core Maven Webapp ............................ SUCCESS [0.296s][INFO] pims.util .................................................... FAILURE [0.518s]改成一样的UTF-8后,先maven clean,然后maven install,提示:[INFO] pims.core Maven Webapp ............................ SUCCESS [0.325s][INFO] pims.util .................................................... SUCCESS [1.596s]之后又遇到过多次这个install失败的问题有一次是找不到jar下面的tool工具类了把java Build Path里面的Libraries中的JRE System Libraries(JRE7)改为jdk7
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wahahachuang5 写道web实时推送技术使用越来越广 ...
web实时推送技术使用越来越广泛，但是自己开发又太麻烦了，我觉 ...
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赞！！！！！！！！！！！！！！！！！！！！！！！！赞！！！！！ ...
不错。学习一下。谢谢}