eclispe 在新建了个项目，在执行Maven Projects下的clean以及compile命令时，报了如下错误：
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 11 source files to D:\JAVA\JavaWorkspace\IdeaProjects\test2\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] 不再支持源选项 1.5。请使用 1.6 或更高版本。
[ERROR] 不再支持目标选项 1.5。请使用 1.6 或更高版本。
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 53.286 s
[INFO] Finished at: 2017-10-18T17:29:36+08:00
[INFO] Final Memory: 10M/35M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project test: Compilation failure: Compilation failure:
[ERROR] 不再支持源选项 1.5。请使用 1.6 或更高版本。
[ERROR] 不再支持目标选项 1.5。请使用 1.6 或更高版本。
[ERROR] -> [Help 1]
[ERROR]
[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]
[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/MojoFailureException
解决方法是：
pom.xml文件中增加jdk的设置，类似如下
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>