以HelloWorld爲例：
代碼路勁：
D:\NewTechnique\hello-world
--src
--main
--java
--com\juvenxu\mvnbook\helloworld
--HelloWorld.java
package com.juvenxu.mvnbook.helloword;
public class HelloWorld{
public String sayHello(){
return "Hello Maven";
}
public static void main(String[] args){
System.out.println(new HelloWorld().sayHello());
}
}
--test
--java
--com\juvenxu\mvnbook\helloworld
--HelloWorldTest.java
package com.juvenxu.mvnbook.helloword;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class HelloWorldTest{
@Test
public void testSayHello(){
HelloWorld helloWorld = new HelloWorld();
String result = helloWorld.sayHello();
assertEquals("Hello Maven",result);
}
}
在完成src/main之後，不寫test相關內容，執行mvn clean compile 進行編譯時的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.juvenxu.mvnbook</groupId>
<artifactId>hello-world</artifactId>
<version>1.0-SNAPSHOT</version>
<name>Maven Hello World Project</name>
</project>
在完成src/test之後，執行 mvn clean test 因爲加入了junit，使用depency的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.juvenxu.mvnbook</groupId>
<artifactId>hello-world</artifactId>
<version>1.0-SNAPSHOT</version>
<name>Maven Hello World Project</name>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
執行mvn clean package ,mvn clean install時，需要將mainClass打入的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.juvenxu.mvnbook</groupId>
<artifactId>hello-world</artifactId>
<version>1.0-SNAPSHOT</version>
<name>Maven Hello World Project</name>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"
>
<mainClass>com.juvenxu.mvnbook.helloworld.HelloWorld</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
這裏的plugins在build之下。執行mvn clean install後，會在target下生產兩個jar
hello-world-1.0-SNAPSHOT.jar 帶有mainClass的jar
original-hello-world-1.0-SNAPSHOT.jar 原始的jar