java服务中整合了spring,在Eclipse里本地启动时没问题,但是部署到局域网linux服务器上时解析spring applicationContext.xml报错,具体报错信息如下:

Console代码  

  1. org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/context]  

 

关于这个问题,纠结了我大半天时间,网上的资料也是众说纷纭,有的说是spring版本不统一、有些说是缺少对应的spring依赖的。不过这些原因都被我逐一排除了。

 

功夫不负有心人,在仔细地对比和排查原因之后,发现了问题的所在,在我的jar包下的META-INF目录下,有两个跟spring相关的文件:spring.handlers、spring.schemas,打开这两个文件一看,里面都只包含了spring-tx的配置

spring.handlers:

Txt代码  

  1. http\://www.springframework.org/schema/tx=org.springframework.transaction.config.TxNamespaceHandler  

spring.schemas:

Txt代码  

  1. http\://www.springframework.org/schema/tx/spring-tx-2.0.xsd=org/springframework/transaction/config/spring-tx-2.0.xsd  

  2. http\://www.springframework.org/schema/tx/spring-tx-2.5.xsd=org/springframework/transaction/config/spring-tx-2.5.xsd  

  3. http\://www.springframework.org/schema/tx/spring-tx-3.0.xsd=org/springframework/transaction/config/spring-tx-3.0.xsd  

  4. http\://www.springframework.org/schema/tx/spring-tx-3.1.xsd=org/springframework/transaction/config/spring-tx-3.1.xsd  

  5. http\://www.springframework.org/schema/tx/spring-tx.xsd=org/springframework/transaction/config/spring-tx-3.1.xsd  

里面并没有spring-context的schema和handler配置,所以会报错。

 

那么问题的根源是什么呢,在stackoverflow上找到了答案:http://stackoverflow.com/questions/1937767/spring-3-0-unable-to-locate-spring-namespacehandler-for-xml-schema-namespace

 

因为我使用了maven-shade-plugin这个maven打包插件,主要原因是插件配置不当导致,我原来的配置如下:

Xml代码  

  1. <plugin>  

  2.     <groupId>org.apache.maven.plugins</groupId>  

  3.     <artifactId>maven-shade-plugin</artifactId>  

  4.     <version> 1.7.1</version>  

  5.     <executions>  

  6.         <execution>  

  7.             <phase>package</phase>  

  8.             <goals>  

  9.                 <goal>shade</goal>  

  10.             </goals>  

  11.             <configuration>  

  12.                 <transformers>  

  13.                     <transformer  

  14.                         implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">  

  15.                         <mainClass>com.chenzhou.test.Main</mainClass>  

  16.                     </transformer>  

  17.                 </transformers>  

  18.             </configuration>  

  19.         </execution>  

  20.     </executions>  

  21. </plugin>  

由于没有配置META-INF/spring.handlers和META-INF/spring.schemas所以如果工程中依赖了Spring的多个依赖,在打包时后面的会把前面的覆盖,使得这两个文件中永远只保存最后一个spring依赖的schema和handler。

解决方法就是在里面加上META-INF/spring.handlers和META-INF/spring.schemas的配置:

Xml代码  

  1. <plugin>  

  2.     <groupId>org.apache.maven.plugins</groupId>  

  3.     <artifactId>maven-shade-plugin</artifactId>  

  4.     <version> 1.7.1</version>  

  5.     <executions>  

  6.         <execution>  

  7.             <phase>package</phase>  

  8.             <goals>  

  9.                 <goal>shade</goal>  

  10.             </goals>  

  11.             <configuration>  

  12.                 <transformers>  

  13.                     <transformer  

  14.                         implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">  

  15.                         <resource>META-INF/spring.handlers</resource>  

  16.                     </transformer>  

  17.                     <transformer  

  18.                         implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">  

  19.                         <resource>META-INF/spring.schemas</resource>  

  20.                     </transformer>  

  21.                     <transformer  

  22.                         implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">  

  23.                         <mainClass>com.chenzhou.test.Main</mainClass>  

  24.                     </transformer>  

  25.                 </transformers>  

  26.             </configuration>  

  27.         </execution>  

  28.     </executions>  

  29. </plugin>  

和第一段配置对比,主要增加了:

Xml代码  

  1. <transformer  

  2.     implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">  

  3.     <resource>META-INF/spring.handlers</resource>  

  4. </transformer>  

  5. <transformer  

  6.     implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">  

  7.     <resource>META-INF/spring.schemas</resource>  

  8. </transformer>  

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。

 

修改完后,再次打包,此时就会把工程依赖的所有的spring依赖的schema和handler都加载到spring.handlers和spring.schemas里面。加载applicationContext.xml时就不会报错了