一、問題描述：
部署一個maven打包項目時，jar包，依賴lib包全部手動上傳至服務器，然后用maven部署報錯：Exception in thread "main" java.lang.NoClassDefFoundError:，當時心想可能是依賴的lib包有問題，各種重新部署（以為是依賴的包沒有更新），確忽略了一個大問題：pom.xml沒仔細檢查。解決方法：最終發現<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>com.bj58.finance.EntryMain</mainClass>
</manifest>
</archive>
</configuration>
</plugin>，這一段被注釋了......直接導致依賴的jar包完全沒有被添加進MANIFEST.MF（jar包解壓縮后：jar包名/META-INF/MANIFEST.MF）的Class-Path。所以最終運行代碼時，只要是依賴別的jar包的類就會報錯，找不到類。這里涉及到MANIFEST.MF相關，詳情請看傳送門。
二、這里就涉及Maven常用插件pom.xml中的配置了。特此收集常用配置如下：
1.根據項目類型打包：jar/war打包插件。
首先看<packaging>jar</packing>屬性,主流就2種類型。
打成jar包插件:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>com.*.MainClass</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
打成war包插件:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<webResources>
<resource>
<directory>src/main/webapp</directory>
<excludes>
<exclude>**/*.jpg</exclude>
</excludes>
</resource>
</webResources>
</configuration>
</plugin>
2. 編譯插件
全局屬性:源碼編碼為utf-8
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>//源代碼編譯版本
<target>1.6</target>//目標平台編譯版本
<includes>
<include>**/*.java</include>
</includes>
<encoding>${project.build.sourceEncoding}</encoding>//字符集編碼,這里引用全局屬性
</configuration>
</plugin>
3.拷貝依賴jar包至target/lib下
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>compile</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<!-- ${project.build.directory}為Maven內置變量，缺省為target -->
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<!-- 表示是否不包含間接依賴的包 -->
<excludeTransitive>false</excludeTransitive>
<!-- 表示復制的jar文件去掉版本信息 -->
<stripVersion>false</stripVersion>
</configuration>
</execution>
</executions>
</plugin>
4.描述打包插件
它支持各種打包文件格式，包括zip、tar.gz、tar.bz2等等
執行mvn assembly:assembly, 執行成功后會在target文件夾下多出一個以-jar-with-dependencies結尾的JAR包. 這個JAR包就包含了項目所依賴的所有JAR的CLASS.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2.1</version>
<configuration>
<descriptors>
<descriptor>src/main/assembly/assembly.xml</descriptor>
</descriptors>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>//把依賴的jar包一起打包
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
5.maven跳過測試用例插件
maven-surefire-plugin 是maven里執行測試用例的插件，不顯示配置就會用默認配置。這個插件的 surefire:test 命令會默認綁定maven執行的 test 階段。
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19</version>
<dependencies>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>2.19</version>
</dependency>
</dependencies>
<configuration>
<skipTests>true</skipTests>//跳過測試用例
</configuration>
</plugin>
6.maven自動build插件
<pluginManagement>
<plugins>
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<versionRange>[2.0,)</versionRange>
<goals>
<goal>copy-dependencies</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<versionRange>[1.0,)</versionRange>
<goals>
<goal>test-compile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>