myeclipse中运用maven自动下载包

maven主要是用于解决包的依赖，一般来说 我们的工程都需要各种各样的包，通常放在WebRoot/WEB-INF/lib路径下

但是 我们每次 发布 工程 都需要 连包一起复制打包， 这样 就很不方便 

maven能在资源库中 缓存 包，在一个服务器环境中除了第一次下载包，以后都可以直接进行读取

要实现maven对包 管理  首先 要 有配置文件  pom.xml

我的配置文件如下:

<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.reallyinfo</groupId>
    <artifactId>buildingProject</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <build>
        <sourceDirectory>src/com</sourceDirectory>
        <resources>
            <resource>
                <directory>src</directory>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </resource>
            <resource>
                <directory>resource</directory>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.17</version>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>findbugs-maven-plugin</artifactId>
                <version>2.5.5</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-checkstyle-plugin</artifactId>
                <version>2.13</version>
                <configuration>
                    <configLocation>resource/checkstyle_checks.xml</configLocation>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-pmd-plugin</artifactId>
                <version>3.2</version>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>jdk.tools</groupId>
            <artifactId>jdk.tools</artifactId>
            <version>1.6</version>
            <scope>system</scope>
            <systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.2.4</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>      
        <dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-client</artifactId>
            <version>0.98.0-hadoop2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-common</artifactId>
            <version>0.98.0-hadoop2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-server</artifactId>
            <version>0.98.0-hadoop2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.struts.xwork</groupId>
            <artifactId>xwork-core</artifactId>
            <version>2.3.15.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.0.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.reallyinfo</groupId>
            <artifactId>aether</artifactId>
            <version>0.1</version>
        </dependency>
        <dependency>
            <groupId>com.reallyinfo</groupId>
            <artifactId>ezmorph</artifactId>
            <version>0.1</version>
        </dependency>
        <dependency>
            <groupId>com.reallyinfo</groupId>
            <artifactId>themis</artifactId>
            <version>0.1</version>
        </dependency>
    </dependencies>
    <reporting>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.17</version>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>findbugs-maven-plugin</artifactId>
                <version>2.5.5</version>
                <configuration>
                    <findbugsXmlOutput>true</findbugsXmlOutput>
                    <findbugsXmlWithMessages>true</findbugsXmlWithMessages>
                    <xmlOutput>true</xmlOutput>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-checkstyle-plugin</artifactId>
                <version>2.13</version>
                <configuration>
                    <configLocation>resource/checkstyle_checks.xml</configLocation>
                </configuration>
                <reportSets>
                    <reportSet>
                        <reports>
                            <report>checkstyle</report>
                        </reports>
                    </reportSet>
                </reportSets>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-pmd-plugin</artifactId>
                <version>3.2</version>
            </plugin>
        </plugins>
    </reporting>
</project>

如果我们只知道包的名字,不知道怎么写它的groupId，我们可以用MyEclipse中的自动搜索功能

在项目上点右键，依次选择Maven4MyEclipse-->add dependency,输入包名称，maven将从中央库查找。比如输入一个logg，就能找到所需要的commons-logging包，点击确定将添加到当前项目

或者去maven包的相关查找网站(有些通过MyEclipse来查找的包在中央仓库会下载失败，这种情况还是要在网站上查找):

http://www.findmaven.net/

http://mvnrepository.com/

http://search.maven.org/

pom.xml中配置的就是我要用到的包,以及它们的版本

然后在 myeclipse中 可以点击自动下载包 

这样maven就会自动下载我们需要的包了  下载成功后 我们就可以把lib包删除了 

如果我们用本地自己打的包,需要通过本地加载的方法