项目构建之maven篇:2.HelloWorld项目构建过程

文件结构说明:

 

 

 

项目构建生命周期：

 

清理

编译

测试

打包

运行

部署

 

 

 

 

 

 

 

清理与编译

 

hello\pom.xml

 

POM:Project Object Model,项目对象模型

pom.xml与ant的build.xml类似

 

 

<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.demo.hello</groupId>
    <artifactId>hello-world</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>hello</name>
</project>

 

说明:

 

 

 

modelVersion:指定当前POM模型的版本,Maven2及Maven3只能是4.0.0

 

 

groupId:项目组名称

 

 

artifactId:当前Maven项目在组中的唯一的id

 

 

version:版本

 

 

hello\src\main\java下的Hello.java

 

package com.demo ;
public class Hello {
    public void sayHi(){
        System.out.println("hello world");
    }
    public static void main(String [] args){
        new Hello().sayHi();
    }
}

运行清理及编译命令:

 

 

 

进入hello的文件夹路径,运行

 

mvn clean compile

运行结果

 

 

 

 

查看target文件夹的内容

 

 

 

 

 

查看本地仓库

 

 

 

测试:

 

hello\pom.xml

 

 

<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.demo.hello</groupId>
    <artifactId>hello-world</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>hello</name>
    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

      <dependencies>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.10</version>
          <scope>test</scope>
        </dependency>
      </dependencies>
</project>

dependencies:指明这个项目所需要的依赖包

 

hello\src\test\java\HelloTest.java

 

package com.demo;

import org.junit.Test;


public class HelloTest {
    @Test
    public void testHello(){
        new Hello().sayHi();
    }
}

运行测试命令

 

 

mvn clean test

 

查看结果

 

 

 

 

查看本地仓库

 

 

 

 

打包

运行命令

 

 

 

 

 

mvn clean package

 

 

查看结果

 

 

运行

 

 

重新改造pom.xml，加入插件

 

pom.xml

 

 

<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.demo.hello</groupId>
    <artifactId>hello-world</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>hello</name>
    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

      <dependencies>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.10</version>
          <scope>test</scope>
        </dependency>
      </dependencies>

      <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.5</source>
          <target>1.5</target>
        </configuration>
      </plugin>
      <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.demo.Hello</mainClass>
                </transformer>
              </transformers>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

重新运行打包命令:

 

 

 

mvn clean package

执行完毕后,进入hello/target下,运行命令

 

 

 

java -jar hello-world-1.0.0-SNAPSHOT.jar

 

 

查看结果:

 

 

 

 

 

 

 

安装到本地仓库，供其它项目依赖

 

 

 

运行命令

 

 

mvn clean install

 

 

查看本地仓库