后，配置idea，运行Junit test。idea右上角，点击下拉框，选择Edit configuration -> "+" ->Maven 配置Working directory为代码目录; command line中填入：clean complile test，表示让执行mvn clean&compile&test。保存配置。点击绿色三角号，运行test，在底部的输出栏内可看到如下内容：
D:studymaven1>mvn test
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building hello-first 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ hello-firs
t ---
[WARNING] Using platform encoding (GBK actually) to copy filtered resources， i.e
. build is platform dependent!
[INFO] skip non existing resourceDirectory D:studymaven1srcmain esources
[INFO]
[INFO] --- maven-compiler-plugin:2.5.1:compile (default-compile) @ hello-first -
--
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ he
llo-first ---
[WARNING] Using platform encoding (GBK actually) to copy filtered resources， i.e
. build is platform dependent!
[INFO] skip non existing resourceDirectory D:studymaven1src est esources
[INFO]
[INFO] --- maven-compiler-plugin:2.5.1:testCompile (default-testCompile) @ hello
-first ---
[WARNING] File encoding has not been set， using platform encoding GBK， i.e. buil
d is platform dependent!
[INFO] Compiling 1 source file to D:studymaven1 arget est-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ hello-first ---
[INFO] Surefire report directory: D:studymaven1 argetsurefire-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running test.TestHello.TestHello
Tests run: 1， Failures: 0， Errors: 0， Skipped: 0， Time elapsed: 0.151 sec
Results :
Tests run: 1， Failures: 0， Errors: 0， Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.346s
[INFO] Finished at: Wed Oct 02 18:23:23 CST 2013
[INFO] Final Memory: 9M/22M
[INFO] ------------------------------------------------------------------------
D:studymaven1>