当我将JRE版本从1.8改为1.6时，Maven-jetty-plugin无法解决项目依赖问题。

Question

操作系统: openSUSE Leap 4.2

IDE:安装了Eclipse :OpenJDK1.8和Oracle JDK1.6

我必须增加一些新的功能，一个现有的系统最近。我的环境和上面一样。

该系统有5个单独的项目，它们的根文件夹并排设置，并使用maven管理构建周期。

部署环境的JRE版本是Oracle JDK1.6，所以在使用JRE 1.8实现并成功测试新特性之后，我必须在develop中降低它的级别，尽管我认为这五个项目的文件夹结构没有按照maven建议排列。

当我将JDK从1.8改为1.6，试图使用maven-jetty-plugin(jetty: run )运行系统时，我得到了以下错误输出：

...
[DEBUG]     =======================================================================
[INFO] 
[INFO] >>> maven-jetty-plugin:6.1.25:run (default-cli) > test-compile @     yingfan-cpm-webapp >>>
[DEBUG] Could not find metadata     yingfan:yingfan-cpm-core:0.0.1-SNAPSHOT/maven-metadata.xml in local     (/home/lfree/.m2.3.2.5/repository)
[DEBUG] Could not find metadata     yingfan:yingfan-cpm-core:0.0.1-SNAPSHOT/maven-metadata.xml in local     (/home/lfree/.m2.3.2.5/repository)
[WARNING] The POM for yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT is missing, no     dependency information available
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=1,     ConflictMarker.markTime=0, ConflictMarker.nodeCount=12, ConflictIdSorter.graphTime=0,     ConflictIdSorter.topsortTime=0, ConflictIdSorter.conflictIdCount=10,     ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=3,     ConflictResolver.conflictItemCount=11, DefaultDependencyCollector.collectTime=212,     DefaultDependencyCollector.transformTime=5}
[DEBUG] yingfan:yingfan-cpm-webapp:war:0.0.1-SNAPSHOT
[DEBUG]    yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT:compile
[DEBUG]    com.lowagie:itext:jar:2.1.7:compile
[DEBUG]       bouncycastle:bcmail-jdk14:jar:138:compile
[DEBUG]       bouncycastle:bcprov-jdk14:jar:138:compile
[DEBUG]       org.bouncycastle:bctsp-jdk14:jar:1.38:compile
[DEBUG]          org.bouncycastle:bcprov-jdk14:jar:1.38:compile
[DEBUG]          org.bouncycastle:bcmail-jdk14:jar:1.38:compile
[DEBUG]    org.json:json:jar:20160212:compile
[DEBUG]    javax.servlet:jstl:jar:1.2:compile
[DEBUG]    ant:ant:jar:1.6.5:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.121 s
[INFO] Finished at: 2016-04-15T18:52:09+08:00
[INFO] Final Memory: 10M/118M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project yingfan-cpm-webapp: Could not resolve     dependencies for project yingfan:yingfan-cpm-webapp:war:0.0.1-SNAPSHOT: Could not find     artifact yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on     project yingfan-cpm-webapp: Could not resolve dependencies for project     yingfan:yingfan-cpm-webapp:war:0.0.1-SNAPSHOT: Could not find artifact     yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT
    at     org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(Life    cycleDependencyResolver.java:220)
    at     org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveProjectDepend    encies(LifecycleDependencyResolver.java:127)
    at     org.apache.maven.lifecycle.internal.MojoExecutor.ensureDependenciesAreResolved(MojoE    xecutor.java:257)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:200)
    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.MojoExecutor.executeForkedExecutions(MojoExecuto    r.java:364)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:198)
    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(LifecycleMod    uleBuilder.java:116)
    at     org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleMod    uleBuilder.java:80)
    at     org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.bui    ld(SingleThreadedBuilder.java:51)
    at     org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:1    20)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
    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:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at     org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415    )
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.project.DependencyResolutionException: Could not resolve     dependencies for project yingfan:yingfan-cpm-webapp:war:0.0.1-SNAPSHOT: Could not find     artifact yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT
    at     org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDe    pendenciesResolver.java:211)
    at     org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(Life    cycleDependencyResolver.java:195)
    ... 26 more
Caused by: org.eclipse.aether.resolution.DependencyResolutionException: Could not find     artifact yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT
    at     org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(Default    RepositorySystem.java:384)
    at     org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDe    pendenciesResolver.java:205)
    ... 27 more
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not find     artifact yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT
    at     org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactReso    lver.java:444)
    at     org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArt    ifactResolver.java:246)
    at     org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(Default    RepositorySystem.java:367)
    ... 28 more
Caused by: org.eclipse.aether.transfer.ArtifactNotFoundException: Could not find     artifact yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT
    at     org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactReso    lver.java:434)
    ... 30 more
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the     following articles:
[ERROR] [Help 1]     http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

在JDK 1.8中，输出如下：

</configuration>
[DEBUG] =======================================================================
[INFO] 
[INFO] >>> maven-jetty-plugin:6.1.25:run (default-cli) > test-compile @     yingfan-cpm-webapp >>>
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=1,     ConflictMarker.markTime=0, ConflictMarker.nodeCount=156, ConflictIdSorter.graphTime=1,     ConflictIdSorter.topsortTime=0, ConflictIdSorter.conflictIdCount=76,     ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=10,     ConflictResolver.conflictItemCount=138, DefaultDependencyCollector.collectTime=258,     DefaultDependencyCollector.transformTime=14}
[DEBUG] yingfan:yingfan-cpm-webapp:war:0.0.1-SNAPSHOT
[DEBUG]    yingfan:yingfan-cpm-core:jar:0.0.1-SNAPSHOT:compile
[DEBUG]       org.springframework:spring-core:jar:3.2.5.RELEASE:compile
[DEBUG]       org.springframework:spring-beans:jar:3.2.5.RELEASE:compile
[DEBUG]       org.springframework:spring-context:jar:3.2.5.RELEASE:compile
[DEBUG]          org.springframework:spring-aop:jar:3.2.5.RELEASE:compile
[DEBUG]          org.springframework:spring-expression:jar:3.2.5.RELEASE:compile
[DEBUG]       org.springframework:spring-web:jar:3.2.5.RELEASE:compile
[DEBUG]          aopalliance:aopalliance:jar:1.0:compile
[DEBUG]       org.springframework:spring-tx:jar:3.2.5.RELEASE:compile
[DEBUG]       org.springframework:spring-orm:jar:3.2.5.RELEASE:compile
[DEBUG]       org.springframework:spring-context-support:jar:3.2.5.RELEASE:compile

英凡-cpm-webapp和英凡-cpm核心是五个项目中的两个，它们都导入到了我的eclipse工作区中。

为什么JDK1.6不能正确识别英凡-cpm-web项目对英凡-cpm-核心项目的依赖？

P.S.JDK版本是这两种情况的唯一不同之处。

Answer 1

信息信息构建失败信息？

如果您能够提供生成失败错误的详细信息，情况就越好。

这可能是因为当将Java版本从8更改为6时，无法编译某些类