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一、问题描述：
部署一个maven打包项目时，jar包，依赖lib包全部手动上传至服务器，然后用maven部署报错：Exception in thread "main" java.lang.NoClassDefFoundError:，当时心想可能是依赖的lib包有问题，各种重新部署（以为是依赖的包没有更新），确忽略了一个大问题：pom.xml没仔细检查。解决方法：最终发现<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>，这一段被注释了......直接导致依赖的jar包完全没有被添加进MANIFEST.MF（jar包解压缩后：jar包名/META-INF/MANIFEST.MF）的Class-Path。所以最终运行代码时，只要是依赖别的jar包的类就会报错，找不到类。这里涉及到MANIFEST.MF相关，详情请看传送门。
二、这里就涉及Maven常用插件pom.xml中的配置了。特此收集常用配置如下：
1.根据项目类型打包：jar/war打包插件。
首先看<packaging>jar</packing>属性,主流就2种类型。
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. 编译插件
全局属性:源码编码为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>//源代码编译版本
<target>1.6</target>//目标平台编译版本
<includes>
<include>**/*.java</include>
</includes>
<encoding>${project.build.sourceEncoding}</encoding>//字符集编码,这里引用全局属性
</configuration>
</plugin>
3.拷贝依赖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>
<!-- ${project.build.directory}为Maven内置变量，缺省为target -->
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<!-- 表示是否不包含间接依赖的包 -->
<excludeTransitive>false</excludeTransitive>
<!-- 表示复制的jar文件去掉版本信息 -->
<stripVersion>false</stripVersion>
</configuration>
</execution>
</executions>
</plugin>
4.描述打包插件
它支持各种打包文件格式，包括zip、tar.gz、tar.bz2等等
执行mvn assembly:assembly, 执行成功后会在target文件夹下多出一个以-jar-with-dependencies结尾的JAR包. 这个JAR包就包含了项目所依赖的所有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>//把依赖的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跳过测试用例插件
maven-surefire-plugin 是maven里执行测试用例的插件，不显示配置就会用默认配置。这个插件的 surefire:test 命令会默认绑定maven执行的 test 阶段。
<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>//跳过测试用例
</configuration>
</plugin>
6.maven自动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>
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原文地址：http://www.cnblogs.com/dennyzhangdd/p/5831112.html
