Maven报错：“请使用 -source 7 或更高版本以启用 diamond 运算符”

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building storm-kafka-test 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] >>> maven-assembly-plugin:2.2-beta-5:assembly (default-cli) > package @ storm-samples >>>
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ storm-samples ---
[WARNING] Using platform encoding (GBK actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory E:eclipseworkspaceCopy_storm-kafka-testsrcmain
esources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ storm-samples ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding GBK, i.e. build is platform dependent!
[INFO] Compiling 5 source files to E:eclipseworkspaceCopy_storm-kafka-test	argetclasses
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /E:/eclipse/workspace/Copy_storm-kafka-test/src/main/java/com/h3c/storm/PrivateHBaseBolt.java:[30,46] -source 1.5 中不支持 diamond 运算符
  (请使用 -source 7 或更高版本以启用 diamond 运算符)
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.976 s
[INFO] Finished at: 2016-07-08T10:57:52+08:00
[INFO] Final Memory: 14M/159M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project storm-samples: Compilation failure
[ERROR] /E:/eclipse/workspace/Copy_storm-kafka-test/src/main/java/com/h3c/storm/PrivateHBaseBolt.java:[30,46] -source 1.5 中不支持 diamond 运算符
[ERROR] (请使用 -source 7 或更高版本以启用 diamond 运算符)
[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

编译版本出现了问题，在pom文件作如下修改

<plugins> 
<plugin> 
<groupId>org.apache.maven.plugins</groupId> 
<artifactId>maven-compiler-plugin</artifactId> 
<configuration> 
<source>1.7</source> 
<target>1.7</target> 
</configuration> 
</plugin> 
</plugins>