Question

当我使用spring v.3.1执行我的java项目时，我得到以下错误：

Bean 'configParser'; nested exception is 

org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/util]
Offending resource: class path resource [Services.xml]
Bean 'configParser'

我的POM具有以下依赖性：

<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>

我的Service.xml文件：

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
 http://www.springframework.org/schema/util  http://www.springframework.org/schema/util/spring-util-3.1.xsd">

    <bean id="configParser" class="com.cc.mp.srv.core.parser.ConfigParser">
        <property name="file" >
            <util:constant static-field="com.cc.mp.srv.main.Main.FILE_NAME"/>
        </property>
    </bean>

为什么找不到实用程序架构？我在pom文件中插入核心依赖项。版本号也是一样的。什么需要Spring呢？

修改

Loading schema mappings from [META-INF/spring.schemas]
2015-01-31 18:56:11,553 DEBUG (main) [org.springframework.beans.factory.xml.PluggableSchemaResolver] - Loaded schema mappings: {http://www.springframework.org/schema/tx/spring-tx-2.5.xsd=org/springframework/transaction/config/spring-tx-2.5.xsd, http://www.springframework.org/schema/tx/spring-tx-3.1.xsd=org/springframework/transaction/config/spring-tx-3.1.xsd, http://www.springframework.org/schema/tx/spring-tx-2.0.xsd=org/springframework/transaction/config/spring-tx-2.0.xsd, http://www.springframework.org/schema/tx/spring-tx.xsd=org/springframework/transaction/config/spring-tx-3.1.xsd, http://www.springframework.org/schema/tx/spring-tx-3.0.xsd=org/springframework/transaction/config/spring-tx-3.0.xsd}

如果输出调试消息，则可以识别出使用了各种版本号。可能是原因？如何定义数字？

我还使用maven-assembly-plugin创建可执行jar文件。

Answer 1

架构http://www.springframework.org/schema/util/spring-util.xsd，http://www.springframework.org/schema/util/spring-util-3.1.xsd（以及带版本的架构）附带spring-beans-<version>.RELEASE.jar

将此jar添加到您的依赖项：

<dependency>
     <groupId>org.springframework</groupId>
     <artifactId>spring-beans</artifactId>
     <version>3.1.2.RELEASE</version>
 </dependency>

maven-assembly-plugin的问题：

您写道：

我还使用maven-assembly-plugin创建可执行jar文件。

啊......我猜maven-assembly-plugin是造成这个问题的原因。这是因为模式解析机制以这种方式工作：Spring提供带有jar的XSD文件。在jar中，文件夹META-INF中的文件是schema.info。此文件包含所有XSD fiels的列表以及此jar提供的位置（在jar中）。

示例：spring-beans-3.1.1.RELEASE.jar

的spring.schema

http\://www.springframework.org/schema/beans/spring-beans-2.0.xsd=org/springframework/beans/factory/xml/spring-beans-2.0.xsd
http\://www.springframework.org/schema/beans/spring-beans-2.5.xsd=org/springframework/beans/factory/xml/spring-beans-2.5.xsd
http\://www.springframework.org/schema/beans/spring-beans-3.0.xsd=org/springframework/beans/factory/xml/spring-beans-3.0.xsd
http\://www.springframework.org/schema/beans/spring-beans-3.1.xsd=org/springframework/beans/factory/xml/spring-beans-3.1.xsd
http\://www.springframework.org/schema/beans/spring-beans.xsd=org/springframework/beans/factory/xml/spring-beans-3.1.xsd
http\://www.springframework.org/schema/tool/spring-tool-2.0.xsd=org/springframework/beans/factory/xml/spring-tool-2.0.xsd
http\://www.springframework.org/schema/tool/spring-tool-2.5.xsd=org/springframework/beans/factory/xml/spring-tool-2.5.xsd
http\://www.springframework.org/schema/tool/spring-tool-3.0.xsd=org/springframework/beans/factory/xml/spring-tool-3.0.xsd
http\://www.springframework.org/schema/tool/spring-tool-3.1.xsd=org/springframework/beans/factory/xml/spring-tool-3.1.xsd
http\://www.springframework.org/schema/tool/spring-tool.xsd=org/springframework/beans/factory/xml/spring-tool-3.1.xsd
http\://www.springframework.org/schema/util/spring-util-2.0.xsd=org/springframework/beans/factory/xml/spring-util-2.0.xsd
http\://www.springframework.org/schema/util/spring-util-2.5.xsd=org/springframework/beans/factory/xml/spring-util-2.5.xsd
http\://www.springframework.org/schema/util/spring-util-3.0.xsd=org/springframework/beans/factory/xml/spring-util-3.0.xsd
http\://www.springframework.org/schema/util/spring-util-3.1.xsd=org/springframework/beans/factory/xml/spring-util-3.1.xsd
http\://www.springframework.org/schema/util/spring-util.xsd=org/springframework/beans/factory/xml/spring-util-3.1.xsd

所以现在你有不同的罐子（spring-beans，spring-tx，spring-aop，spring-context ...），它们都包含一个META-INF/spring.schemas文件，内容不同。另一方面，您使用maven-assembly-plugin在一个jar文件中聚合所有jar文件的内容。

我猜你也会在spring.handlers文件中遇到这个问题。

看起来您可以配置maven-assembly-plugin来合并这些文件。请参阅this answer

的How can I merge resource files in a Maven assembly?

另一种解决方案是使用spring-boot-maven-plugin代替maven-assembly-plugin

 <plugin>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-maven-plugin</artifactId>
     <version>1.2.1</version>
     <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <mainClass>YOUR.MAIN.CLASS</mainClass>
    </configuration>
 </plugin>

（或使用maven-shade-pluging）

Answer 2

我遇到了与maven-shade-plugin类似的问题。我的案例中的解决方案由this solution涵盖。

基本上你必须在pom.xml中的maven-shade-plugin配置中添加AppendingTransformer。从下面添加2个AppendingTransformer条目：

<configuration>
    <outputDirectory>${basedir}/bin</outputDirectory>
    <finalName>myName</finalName>
    <transformers>
        <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
            <mainClass>com.foo.MyApp</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>

无法找到Spring NamespaceHandler util

2 个答案: