maven学习之路三

我们在写代码的时候，有些项目会有重复代码，或者是重复项目结构，这样我们就可以用maven 生成一个项目的基本骨架，就像我之前介绍的哪个logindemo一样继承了webApp-achetype一样。我们也可以生成我们自己的项目骨架。
准备下我们的项目骨架结构：看图：

看下我这边的已有的代码：

我的这个程序是一个普通http接口。然后往往在公司会有很多这样的接口，然后每个接口都去实现同样的一份代码程序会感觉很费时间，包括拷贝代码建立项目目录等，都会很花费时间的，通用的代码可以做成jar 被依赖继承，但是那些不通用的地方就需要自己实现了，但是自己实现的项目结构往往是一样的，这样就可以用到这个骨架了。
来看下我这pom.xml文件：

    <?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.nnk.template</groupId>
    <artifactId>template</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>XLTDRecharge Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.1.2.RELEASE</version>
        <relativePath />
        <!-- lookup parent from repository -->
    </parent>
    <distributionManagement>
        <repository>
            <id>nnk-releases</id>
            <name>NNK Releases Repository</name>
            <url>${repositories.releases.url}</url>
        </repository>
        <snapshotRepository>
            <id>nnk-snapshots</id>
            <name>NNK Snapshots Repository</name>
            <url>${repositories.snapshots.url}</url>
        </snapshotRepository>
    </distributionManagement>
    <properties>
        <java.version>1.6</java.version>
        <start-class>com.nnk.template.recharge.Main</start-class>
        <main.basedir>${basedir}/../..</main.basedir>
        <m2eclipse.wtp.contextRoot>/</m2eclipse.wtp.contextRoot>
        <httpclient.version>4.4.1</httpclient.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>log4j-over-slf4j</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>log4j</artifactId>
                    <groupId>log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--<dependency>-->
        <!--<groupId>org.springframework.boot</groupId>-->
        <!--<artifactId>spring-boot-starter-tomcat</artifactId>-->
        <!--<scope>provided</scope>-->
        <!--</dependency>-->
        <!--<dependency>-->
        <!--<groupId>org.apache.tomcat.embed</groupId>-->
        <!--<artifactId>tomcat-embed-jasper</artifactId>-->
        <!--<scope>provided</scope>-->
        <!--</dependency>-->
        <!--<dependency>-->
        <!--<groupId>javax.servlet</groupId>-->
        <!--<artifactId>jstl</artifactId>-->
        <!--</dependency>-->
        <!--httpClient dependency  start-->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.6</version>
        </dependency>
        <dependency>
            <groupId>org.jvnet.hudson.dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1-hudson-3</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>fluent-hc</artifactId>
            <version>${httpclient.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-logging</artifactId>
                    <groupId>commons-logging</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.2.4</version>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>15.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>${httpclient.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-codec</artifactId>
                    <groupId>commons-codec</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>${httpclient.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>${httpclient.version}</version>
        </dependency>
        <!--<dependency>-->
            <!--<groupId>commons-codec</groupId>-->
            <!--<artifactId>commons-codec</artifactId>-->
            <!--<version>1.6</version>-->
        <!--</dependency>-->
        <dependency>
            <groupId>com.nnk.base</groupId>
            <artifactId>msgsrv-tools</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>com.nnk.transport</groupId>
            <artifactId>interface-extern-spring</artifactId>
            <version>1.3</version>
        </dependency>

        <dependency>
            <groupId>com.nnk.base</groupId>
            <artifactId>msgsrv-client</artifactId>
            <version>1.3</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>


    </dependencies>
    <build>
        <finalName>LMRecharge</finalName>
        <sourceDirectory>src/main/java</sourceDirectory>
        <testSourceDirectory>src/test/java</testSourceDirectory>
        <pluginManagement>
            <plugins>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <source>1.6</source>
                        <target>1.6</target>
                        <encoding>GBK</encoding>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <classifier>boot</classifier>
                </configuration>
            </plugin>
            <!--生成可执行JAR包命令 maven-jar-plugin-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.4</version>
                <executions>
                    <execution>
                        <id>interface-extern-spring</id>
                        <goals><goal>jar</goal></goals>
                        <phase>package</phase>
                        <configuration>
                            <excludes>
                                <exclude>**/src/test/resource/**</exclude>
                                <exclude>**/*Test.java</exclude>
                            </excludes>
                        </configuration>
                    </execution>
                </executions>
                <configuration>
                    <excludes>
                        <exclude>src/main/resources</exclude>
                        <exclude>src/test/resource</exclude>
                        <exclude>**/*Test.java</exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

这里面别的我就不介绍了，主要讲下这段配置

 <distributionManagement>
        <repository>
            <id>nnk-releases</id>
            <name>NNK Releases Repository</name>
            <url>${repositories.releases.url}</url>
        </repository>
        <snapshotRepository>
            <id>nnk-snapshots</id>
            <name>NNK Snapshots Repository</name>
            <url>${repositories.snapshots.url}</url>
        </snapshotRepository>
    </distributionManagement>

这里主要是deploy和install用到个人私服仓库，这里会指定你上传到哪里的url 。我的url在maven 配置settings文件里面配置了，所以这里只要用${引用就可以了}；
如果没有settings.xml中没有配置就需要这样配置了：

<repositories>
        <repository>
            <id>local-nexus</id>
            <name>private repository nexus</name>
            <url>http://xxx:8081/nexus/content/groups/public/</url>
            <releases>
            </releases>
            <snapshots>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>local-nexus</id>
            <name>private plugin nexus</name>
            <url>http://xxx:8081/nexus/content/groups/public/</url>
            <releases>
            </releases>
            <snapshots>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <distributionManagement>
        <repository>
            <id>releases</id>
            <name>Nexus Release Repository</name>
            <url>http://xxx:8081/nexus/content/repositories/releases/</url>
        </repository>
        <snapshotRepository>
            <id>snapshots</id>
            <name>Nexus Snapshot Repository</name>
            <url>http://xxx:8081/nexus/content/repositories/snapshots/</url>
        </snapshotRepository>
    </distributionManagement>

step 2 ：接下来就是生成这个项目骨架了

1. cmd到项目目录，mvn clean，然后 mvn archetype:create-from-project
   
2. 成功之后cd到target/generated-sources/archetype， mvn clean compile
   然后查看下这个目录下有什么东西
   
   3.然后检查下target/generated-sources/archetype这个目录下这pom.xml文件

<?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.nnk.template</groupId>
  <artifactId>template-archetype</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>maven-archetype</packaging>

  <name>template-archetype</name>

  <build>
    <extensions>
      <extension>
        <groupId>org.apache.maven.archetype</groupId>
        <artifactId>archetype-packaging</artifactId>
        <version>2.4</version>
      </extension>
    </extensions>

    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-archetype-plugin</artifactId>
          <version>2.4</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>

  <description>Spring Boot Starter Parent</description>

  <url>http://maven.apache.org</url>

  <developers>
    <developer>
      <id>pwebb</id>
      <name>Phillip Webb</name>
      <email>pwebb at gopivotal.com</email>
      <organization>Pivotal Software, Inc.</organization>
      <organizationUrl>http://www.spring.io</organizationUrl>
      <roles>
        <role>Project lead</role>
      </roles>
    </developer>
    <developer>
      <id>dsyer</id>
      <name>Dave Syer</name>
      <email>dsyer at gopivotal.com</email>
      <organization>Pivotal Software, Inc.</organization>
      <organizationUrl>http://www.spring.io</organizationUrl>
      <roles>
        <role>Project lead</role>
      </roles>
    </developer>
  </developers>

  <licenses>
    <license>
      <name>Apache License, Version 2.0</name>
      <url>http://www.apache.org/licenses/LICENSE-2.0</url>
    </license>
  </licenses>

  <scm>
    <url>https://github.com/spring-projects/spring-boot/spring-boot-starter-parent/template</url>
  </scm>
</project>

如果此时mvn deploy 的化会出现Error 如下图

并没有下面这个：

    <distributionManagement>
          <repository>
              <id>nnk-releases</id>
              <name>NNK Releases Repository</name>
              <url>${repositories.releases.url}</url>
          </repository>
          <snapshotRepository>
              <id>nnk-snapshots</id>
              <name>NNK Snapshots Repository</name>
              <url>${repositories.snapshots.url}</url>
          </snapshotRepository>
      </distributionManagement>

这时就需要在pom.xml里面加上这段：
完整的应该是：

<?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.nnk.template</groupId>
  <artifactId>template-archetype</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>maven-archetype</packaging>

  <name>template-archetype</name>

  <build>
    <extensions>
      <extension>
        <groupId>org.apache.maven.archetype</groupId>
        <artifactId>archetype-packaging</artifactId>
        <version>2.4</version>
      </extension>
    </extensions>

    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-archetype-plugin</artifactId>
          <version>2.4</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>

  <description>Spring Boot Starter Parent</description>

  <url>http://maven.apache.org</url>

  <developers>
    <developer>
      <id>pwebb</id>
      <name>Phillip Webb</name>
      <email>pwebb at gopivotal.com</email>
      <organization>Pivotal Software, Inc.</organization>
      <organizationUrl>http://www.spring.io</organizationUrl>
      <roles>
        <role>Project lead</role>
      </roles>
    </developer>
    <developer>
      <id>dsyer</id>
      <name>Dave Syer</name>
      <email>dsyer at gopivotal.com</email>
      <organization>Pivotal Software, Inc.</organization>
      <organizationUrl>http://www.spring.io</organizationUrl>
      <roles>
        <role>Project lead</role>
      </roles>
    </developer>
  </developers>

  <licenses>
    <license>
      <name>Apache License, Version 2.0</name>
      <url>http://www.apache.org/licenses/LICENSE-2.0</url>
    </license>
  </licenses>
  <distributionManagement>
          <repository>
              <id>nnk-releases</id>
              <name>NNK Releases Repository</name>
              <url>${repositories.releases.url}</url>
          </repository>
          <snapshotRepository>
              <id>nnk-snapshots</id>
              <name>NNK Snapshots Repository</name>
              <url>${repositories.snapshots.url}</url>
          </snapshotRepository>
      </distributionManagement>
  <scm>
    <url>https://github.com/spring-projects/spring-boot/spring-boot-starter-parent/template</url>
  </scm>
</project>

然后再 mvn deploy 之后就把这个骨架上传到我们的私服仓库了。

step 3：怎么使用这个骨架

我新建一个项目：

点击ok 然后:

之后的步骤就不多介绍了和前面logindemo的步骤是一样的。
最终生成的项目结构就是这样子的：

这样我们的项目结构骨架就是这样生成了，这样只需要在项目骨架上面做开发了，是不是会爽很多，
有什么不懂得地方欢迎和我交流，