我们在“项目创建”一章中学到的是如何使用Maven创建Java应用程序。现在我们将看到如何创建和测试应用程序。
转到您创建Java应用程序的C：/ MVN目录。打开consumerBanking文件夹。您将看到包含以下内容的POM.xml文件。
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.companyname.projectgroup</groupId>
<artifactId>project</artifactId>
<version>1.0</version>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
</dependency>
</dependencies>
</project>
在这里可以看到，Maven已经添加了Junit作为测试框架。默认情况下，Maven 在前一章探讨的默认目录结构中添加了一个源文件App.java和一个测试文件AppTest.java。
让我们打开命令控制台，进入C： MVN consumerBanking目录，然后执行下面的mvn命令。
C:MVNconsumerBanking>mvn clean package
Maven将开始建设项目。
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building consumerBanking 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ consumerBanking ---
[INFO] Deleting C:MVNconsumerBanking arget
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ consumerBanking ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources,i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory C:MVNconsumerBankingsrcmain
esources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ consumerBanking ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 1 source file to C:MVNconsumerBanking argetclasses
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ consumerBanking ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory C:MVNconsumerBankingsrc est
esources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ consumerBanking ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. b
uild is platform dependent!
[INFO] Compiling 1 source file to C:MVNconsumerBanking arget est-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ consumerBanking ---
[INFO] Surefire report directory: C:MVNconsumerBanking argetsurefire-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running com.companyname.bank.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.063 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ consumerBanking ---
[INFO] Building jar: C:MVNconsumerBanking argetconsumerBanking-1.0-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 14.406 s
[INFO] Finished at: 2015-09-27T17:58:06+05:30
[INFO] Final Memory: 14M/247M
[INFO] ------------------------------------------------------------------------
您已经创建了项目并创建了最终的jar文件，以下是关键的学习概念
我们给maven两个目标，首先清理目标目录（clean），然后将项目创建输出打包成jar（包）。
ConsumerBanking-1.0-SNAPSHOT.jar中的consumerBanking target文件夹中提供了打包的jar。
consumerBanking target surefire-reports文件夹中提供测试报告。
Maven编译源代码文件，然后测试源代码文件。
然后Maven运行测试用例。
最后Maven创建了这个包。
现在打开命令控制台，进入C： MVN consumerBanking target classes目录并执行以下java命令。
C:MVNconsumerBanking argetclasses>java com.companyname.bank.App
你会看到结果
Hello World!
添加Java源文件
我们来看看我们如何在我们的项目中添加额外的Java文件。打开C： MVN consumerBanking src main java com companyname bank文件夹，将Util类创建为Util.java。
package com.companyname.bank;
public class Util
{
public static void printMessage(String message){
System.out.println(message);
}
}
更新App类以使用Util类。
package com.companyname.bank;
/**
* Hello world!
*
*/
public class App
{
public static void main( String[] args )
{
Util.printMessage("Hello World!");
}
}
现在打开命令控制台，进入C： MVN consumerBanking目录，然后执行下面的mvn命令。
C:MVNconsumerBanking>mvn clean compile
Maven创建成功后，请执行以下命令：C： MVN consumerBanking target classes目录。
C:MVNconsumerBanking argetclasses>java -cp com.companyname.bank.App
你会看到结果
Hello World!
