java - 匹配通配符严格，但找不到元素 'tx:annotation-driven' 'context:component-scan' 的声明

Question

任何人都可以确定下面的命名空间声明有什么问题吗？我已经提到了所有 namespace 并提供了对架构文件的引用。不确定还缺少什么。

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" 
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="    
          http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd    
          http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd    
          http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd    
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.mypackage" />
    <context:annotation-config />
    <tx:annotation-driven />

</beans>

错误消息:

Multiple annotations found at this line: - cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'tx:annotation-driven'. - schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/tx/spring-tx.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.

Answer 1

与 Eclipse 相比，我更喜欢 STS，这就是重现问题的方法...

我有一个带有 Spring 上下文依赖项的 Maven 项目:

pom.xml

<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>betlista</groupId>
    <artifactId>tests.so.q34779551</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>SO-q34779551</name>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
    </dependencies>

</project>

当我现在在 src/main/resources 中创建 spring.xml 时，与您的相同，我遇到了同样的问题:

schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/beans/spring-beans.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/context/spring-context.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/context/spring-context.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/tx/spring-tx.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.

问题是，spring-tx 和 spring-context 不在依赖项中 - 添加后，错误已修复。

更多详细信息请参见this answer .