标签：maven jar
技术点：spring加载xsd过程：
http://blog.csdn.net/bluishglc/article/details/7596118
案发背景：
1、一个使用maven管理的普通项目（vcenter-collector ：关于Vcenter数据采集）
2、项目主要技术： java + mybatis（基于接口形式）+其他
3、项目中有一个非maven仓库的jar包：vijava(做vcenter数据采集的)，在项目中以system方式引用
(该jar放在${project.basedir}/lib下)
需求： 将该项目打包为一个可执行jar
案发经过：
1、引用maven的插件（maven-assembly-plugin）打有依赖的jar包
<plugin> <artifactId>maven-assembly-plugin</artifactId> <configuration> <archive> <manifest> <mainClass>com.main.VcenterCollectMain</mainClass> </manifest> </archive> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> </configuration> </plugin>
利用命令： mvn clean assembly:assembly 进行打包，
打好包后运行：java -jar Vcenter-Collector.jar
运行报错：
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/context]
然后开始在网上搜罗答案，结果有惊喜啊，发现spring配置文件在加载的时候需要相关的xsd配合，只管自己没了解spring配置文件加载细节，在iteye上有一篇帖子：
http://chenzhou123520.iteye.com/blog/1971322 说明了原因，并给出了解决方案
好吧，按照帖子方案选择了maven-shade-plugin 插件，修改配置如下：
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version> 1.7.1</version> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>com.chenzhou.test.Main</mainClass> </transformer> </transformers> </configuration> </execution> </executions> </plugin>
主要是靠下面配置（打包时分别合并所有的spring.schemas与spring.handlers文件，这样就不会丢失）：
<transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"> <resource>META-INF/spring.handlers</resource> </transformer> <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"> <resource>META-INF/spring.schemas</resource> </transformer> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>com.main.VcenterCollectMain</mainClass> </transformer> </transformers>
这段配置意思是把spring.handlers和spring.schemas文件以append方式加入到构建的jar包中。
好了，接着打包：mvn clean package ，这下前面的命名空间问题解决了，但虎去狼来啊，又有新问题：由于项目采用mybatis，而且采用接口形式开发，将mapper文件统统放到了java类目录，而不是资源目录，截图如下：
结果，导致maven打包时，这些xml文件打不进去，没办法，接着引入<resource>配置：
<resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource>
好了，这下mapper打进去了，运行时又出错了，找不到类，这些类正好是通过system方式管理的本地jar:
<dependency>
<groupId>vijava</groupId>
<artifactId>vijava</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>${project.basedir}/lib/vijava55b20130927.jar</systemPath>
</dependency>又开始百度，，找到答案，说是要利用<resource>配置指定jar位置，加入如下配置：
<resource> <targetPath>lib/</targetPath> <directory>lib/</directory> <includes> <include>**/vijava55b20130927.jar</include> </includes> </resource>
好了，打包mvn clean package ，打包正常，这个jar在jar包中在单独的lib目录中，好了准备运行jar试试，结果，报错，说找不到类，而该类就是lib中的类，看来这样虽然可以将system管理的包打到jar中，但运行时却引用不到，看来不行啊，继续找，找。。
有人说，将jar安装到本地仓库，我也想啊，但是，别人拿到项目还不是得在自己的本地再次安装一遍，太费事，采取终极方案：
添加 in project repository，在新机器上执行时就不用运行mvn install:install-file命令了
配置如下：
<repositories>
<repository>
<id>in-project</id>
<name>In Project Repo</name>
<url>file://${project.basedir}/lib</url>
</repository>
</repositories>
<dependency>
<groupId>vijava</groupId>
<artifactId>vijava</artifactId>
<version>1.0</version>
</dependency>本项目配置如下：
注意：
你的jar包及路径必须严格遵循格式： /groupId/artifactId/version/artifactId-verion.jar 本例中： lib/org/richard/my-jar/1.0/my-jar-1.0.ja maven-shade-plugin插件有个配置属性:createDependencyReducedPom,默认值为true. 注意这个属性,如果你用这个插件来deploy,或者发布到中央仓库 这个属性会缩减你的pom文件,会把你依赖的<dependency>干掉 正确的做法是把这个值改成false，如果为true，则会生成一个裁剪的pom文件： dependency-reduced-pom.xml 应该将该值改为false： <configuration> <createDependencyReducedPom>false</createDependencyReducedPom> </configuration>
最后给出本项目完整配置的pom：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.huhu</groupId>
<artifactId>VcenterCollector</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>VcenterCollector</name>
<url>http://maven.apache.org</url>
<repositories>
<repository>
<id>in-project</id>
<name>In Project Repo</name>
<url>file://${project.basedir}/lib</url>
</repository>
</repositories>
<properties>
<spring.version>4.1.4.RELEASE</spring.version>
<mybatis.version>3.2.6</mybatis.version>
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8</version>
<scope>test</scope>
</dependency>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.5</version>
</dependency>
<!-- end spring -->
<!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.30</version>
</dependency>
<!-- 添加druid连接池包 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.12</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>vijava</groupId>
<artifactId>vijava</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
<build>
<finalName>VcenterCollector</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version> 1.7.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring.handlers</resource>
</transformer>
<transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring.schemas</resource>
</transformer>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.main.VcenterCollectMain</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
</project>标签：maven jar
原文地址：http://langlichong.blog.51cto.com/8846944/1754239
