请原谅我，如果这是一个愚蠢的问题，但我正在试图编译一些java代码，我发现在http://thisdataguy.com/2014/02/07/how-to-build-a-full-flume-interceptor-by-a-non-java-developer/
我对java编程非常陌生，当我运行代码时，会发现错误：
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Unnamed - org.apache.flume:eventTweaker:jar:1.0
[INFO] task-segment: [clean, package]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] Deleting file set: /home/kwincott/jars/tweaker/target (included: [**], excluded: [])
[INFO] [resources:resources {execution: default-resources}]
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/kwincott/jars/tweaker/src/main/resources
[INFO] [compiler:compile {execution: default-compile}]
[INFO] Compiling 1 source file to /home/kwincott/jars/tweaker/target/classes
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Compilation failure
/home/kwincott/jars/tweaker/src/main/java/com/example/flume/interceptors /eventTweaker.java:[18,3] annotations are not supported in -source 1.3
(use -source 5 or higher to enable annotations)
@Override
/home/kwincott/jars/tweaker/src/main/java/com/example/flume/interceptors/eventTweaker.java:[24,7] generics are not supported in -source 1.3
(use -source 5 or higher to enable generics)
Map<String, String> headers = event.getHeaders();
/home/kwincott/jars/tweaker/src/main/java/com/example/flume/interceptors/eventTweaker.java:[46,20] for-each loops are not supported in -source 1.3
(use -source 5 or higher to enable for-each loops)
for (Event event:events) {
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Wed Aug 20 16:26:17 BST 2014
[INFO] Final Memory: 19M/303M
[INFO] ------------------------------------------------------------------------
2条答案
按热度按时间wvt8vs2t1#
构建失败报告几乎说明了一切：
（使用-source 5或更高版本为每个循环启用）
您可能正在使用jdk（6或更高版本）和/或maven（3.x或更高版本）的过时版本。更新到最新的jdk和maven版本，错误应该消失了。
但是，正如构建报告末尾的信息部分所说，
for more information, run Maven with the -e switch. 这将帮助您在将来调试问题。mepcadol2#
显然，maven的编译器插件并不关心您实际使用的java版本。错误消息提示您在系统中设置某些配置
pom.xml:maven编译器插件文档
还有帮助：使用javac和javax.tools.javacompiler有什么区别？