我得到了错误Unable to locate NamespaceHandler when using context:annotation-config
正在运行(java -jar)一个由maven-assembly-plugin组装并包含我的项目及其所有依赖项的jar。
正如其他人在forum.springsource.org thread (message #7/8)上正确发现的那样,问题就出现了,因为存在于不同邮箱中的文件META-INF/spring.handlers
和META-INF/spring.schemas
会在maven-时被覆盖assembly-plugin将jar重新打包到一个文件中。
查看两个spring - * .jar文件的内容,您可以看到文件位于相对于类路径的相同位置
$ jar tf spring-oxm-3.0.3.RELEASE.jar
META-INF/spring.handlers
META-INF/spring.schemas
org/springframework/oxm/GenericMarshaller.class
...
$ jar tf spring-context-3.0.3.RELEASE.jar
META-INF/spring.handlers
META-INF/spring.schemas
org/springframework/context/ApplicationContext.class
是不是可以将META-INF文件夹放在特定的包中?如果是这样,我建议的想法(希望它适用)是将META-INF/spring.shemas
和META-INF/spring.handlers
文件放在他们引用的包下。
$ jar tf spring-oxm-3.0.3.RELEASE.jar
org/springframework/oxm/META-INF/spring.schemas
org/springframework/oxm/META-INF/spring.handlers
org/springframework/oxm/GenericMarshaller.class
...
$ jar tf spring-context-3.0.3.RELEASE.jar
org/springframework/context/META-INF/spring.handlers
org/springframework/context/META-INF/spring.schemas
org/springframework/context/ApplicationContext.class
这种方式在单个jar中合并时不会发生冲突。你觉得怎么样?
答案 0 :(得分:83)
我设法使用着色器插件而不是(buggy)汇编程序插件来摆脱错误:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>at.seresunit.lecturemanager_connector.App</mainClass>
</transformer>
<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>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
我想我在Springsource论坛上找到了解决方案..自从我查阅以来已经有一段时间了......真的不记得作者了。无论如何,对他赞不绝口:p
欢呼声
答案 1 :(得分:2)
使用Ant。
<!--define couple of properties to identify spring jar files-->
<property name="spring-beans-jar" value="spring-beans-4.0.5.RELEASE.jar"/>
<property name="spring-context-jar" value="spring-context-4.0.5.RELEASE.jar"/>
<!--other properties-->
<target name="dist" depends="compile" description="Prepare distribution">
<!--dump spring-context into build classes (or some place else)-->
<unjar src="${lib.dir}/${spring-context-jar}" dest="${build.classes.dir}"/>
<!--dump spring-beans on top of it overwriting META-INF/spring.* files-->
<unjar src="${lib.dir}/${spring-beans-jar}" dest="${build.classes.dir}"/>
<!--get overwritten META-INF/spring.* files of spring-context to some other place-->
<unjar src="${lib.dir}/${spring-context-jar}" dest="${build.tmp.dir}">
<patternset>
<include name="META-INF/spring.handlers"/>
<include name="META-INF/spring.schemas"/>
<include name="META-INF/spring.tooling"/>
</patternset>
</unjar>
<!--skipped spring-beans/META-INF/spring.factories as its not present in spring-context-->
<!--handled only spring-context and spring-beans as that's what I needed at this point-->
<!--append content from spring-context/META-INF/spring.* files-->
<concat destfile="${build.classes.dir}/META-INF/spring.handlers" append="true">
<filelist dir="${build.tmp.dir}" files="META-INF/spring.handlers"/>
</concat>
<concat destfile="${build.classes.dir}/META-INF/spring.schemas" append="true">
<filelist dir="${build.tmp.dir}" files="META-INF/spring.schemas"/>
</concat>
<concat destfile="${build.classes.dir}/META-INF/spring.tooling" append="true">
<filelist dir="${build.tmp.dir}" files="META-INF/spring.tooling"/>
</concat>
<jar destfile="${build.dist.dir}/application.jar">
<fileset dir="${build.classes.dir}"/>
<!--include all .jar files except already extracted ones-->
<zipgroupfileset dir="${lib.dir}" includes="*.jar"
excludes="${spring-beans-jar}, ${spring-context-jar}"/>
<manifest>
<attribute name="Main-Class" value="${main-class}"/>
</manifest>
</jar>
</target>