1、maven笔记(一):构建项目

1.在E:下新建mvn目录,由于mvn默认搜索路径为src/main/java/目录下,所以我们在mvn下新建目录/src/main/java/com/zmp/mvn/helloworld/HelloWorld.java,最终目录结构如下:

"E:mvnsrcmainjavacomzmpmvnhelloworldHelloWorld.java"

HelloWorld.java代码如下:

package com.zmp.mvn.helloworld;
public class HelloWorld {
    public static String sayHello() {
        return "Hello Maven";
    }

    public static void main(String[] args) {
        HelloWorld h = new HelloWorld();
        System.out.println(h.sayHello());
    }
}

2.在E:mvn下新建pom.xml:

pom.xml

<!-- 文档的版本和编码方式 -->
<?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"
    xmi:schemaLocation="http://maven.apache.org/POM/4.0.0
    http://maven.apache.org/maven-v4_0_0.xsd">

    <!--POM模型的版本,对于Maven2.0和3.0来说,它只能是4.0.0 -->
    <modelVersion>4.0.0</modelVersion>
    <!-- groupId,artifactId和version这三个元素定义了项目的坐标,在maven的世界里,
         任何pom,jar或者war都是基于这些坐标区分的 -->
    <!-- 定义了项目属于哪个组,跟公司或者个人存在关联 -->
    <groupId>com.zmp.mvn</groupId>
    <!-- 定义了当前maven项目在组中的唯一id -->
    <artifactId>hello-world</artifactId>
    <!-- 当前项目版本,SNAPSHOT为快照的意思,说明项目还在开发当中,是不稳定的版本 -->
    <version>1.0-SNAPSHOT</version>
    <!-- 项目名称,比较友好,不是必须的,但方便信息交流 -->
    <name>MAVEN HELLO WORLD PROJECT</name>
</project>

3.进入E:mvn目录下,如图:

输出的内容如下:

[INFO] Scanning for projects...
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building MAVEN HELLO WORLD PROJECT 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ hello-world ---
[INFO] Deleting E:mvn arget
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ hello-world ---
[WARNING] Using platform encoding (GBK actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory E:mvnsrcmain esources
[INFO] 
[INFO] --- maven-compiler-plugin:2.5.1:compile (default-compile) @ hello-world ---
[WARNING] File encoding has not been set, using platform encoding GBK, i.e. build is platform dependent!
[INFO] Compiling 1 source file to E:mvn argetclasses
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.024 s
[INFO] Finished at: 2014-04-16T10:35:47+08:00
[INFO] Final Memory: 7M/103M
[INFO] ------------------------------------------------------------------------

4.在mvn目录下多了个target文件夹:

即构建项目成功,所编译的类在 argetclasses目录下

5.用到的命令

clean(指清理target文件夹,默认删除该文件夹及文件夹下所有文件,如果target文件夹存在的话)

compile(指编译项目主代码)

 

 

 

来自为知笔记(Wiz)