将Maven项目打包成可执行jar文件(引用第三方jar)-支持Spring的项目

http://mgorski.net/2013/dev/executable-jar-with-spring-based-application-inside-usin-maven

        当用maven-assembly-plugin连同第三方包一起打包到一个jar包，会出错，这里就用maven-shade-plugin进行打包。

        While working with java and maven, I used to create executable JARs with maven-assembly-plugin [link]. Is is simple and it does its job pretty well in most of the cases – but not when building Spring-based applications with a lot of modules.

        Of course the same application, when started from IDE, runs fine.       

        After a while of googling I was able to understand the problem: spring’s namespace handlers for various modules are registered in special files (META-INF/spring.handlers, META-INF/spring.schemas, META-INF/spring.tooling) – and those are getting overwritten when the final bundle is being created out of other JARs. To solve this problem I have switched tomaven-shade-plugin and configured its transformers to merge (append) spring files.

Here is a piece of maven configutation that does the job.
(You need to add it to you pom.xml, under build/plugins).

<plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-shade-plugin</artifactId><version>1.7</version><executions><execution><phase>package</phase><goals><goal>shade</goal></goals><configuration><!-- 打包后jar包的名字，可随意写 --><finalName>my-spring-app</finalName><shadedArtifactAttached>true</shadedArtifactAttached><shadedClassifierName>jar-with-dependencies</shadedClassifierName><transformers><transformerimplementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"><mainClass>com.tang.path.to.my.main.Clazz</mainClass></transformer><transformerimplementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"><resource>META-INF/spring.handlers</resource></transformer><transformerimplementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"><resource>META-INF/spring.schemas</resource></transformer><transformerimplementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"><resource>META-INF/spring.tooling</resource></transformer></transformers></configuration></execution></executions></plugin>

如果一些配置文件不想放jar包内，想放在外面方便修改，可以配置：

<resources>         <resource>            <targetPath>${basedir}/target/conf</targetPath>           <filtering>false</filtering>        <directory>${basedir}/conf</directory>        <includes>          <include>*.properties</include>        </includes>      </resource>      <resource>            <targetPath>${basedir}/target/classes</targetPath>           <filtering>false</filtering>        <directory>${basedir}/src/main/resources</directory>        <includes>          <include>*.xml</include>        </includes>              <excludes>                   <exclude>**/*.properties</exclude>             </excludes>        </resource> </resources> 

放到jar包外面后的访问路径类似 "file:conf/myproperty.properties"，

方法一，在java代码中：

Resource resource = resourceLoader.getResource("file:conf/myproperty.properties");

方法二，在配置文件中：

<beans:value>file:conf/hubInterface.properties</beans:value>

另外需要说明的是，如果是防在jar包里面，访问路径类似"classpath:myproperty.properties"，

这时， 方法一就找不到它，但方法二能找到