多个 spring 不同版本的依赖

Question

我正在使用 spring-boot 并希望在我的项目中包含两个不同版本的 spring-web，因为最新版本中的 API 之一已被弃用。为了继续使用它，我包含了两个不同版本的 spring-web 依赖项，但 eclipse 只识别它们。

我已经尝试从旧版本的 spring-web 中排除几乎所有内容，但这似乎也不起作用 - 请问有什么办法吗？

<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>3.0.2.RELEASE</version>
        <exclusions>
            <exclusion>
                <groupId>aopalliance</groupId>
                <artifactId>aopalliance</artifactId>
            </exclusion>
            <exclusion>
                <groupId>axis</groupId>
                <artifactId>axis</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.caucho</groupId>
                <artifactId>com.springsource.com.caucho</artifactId>
            </exclusion>
            <exclusion>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.el</groupId>
                <artifactId>el-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.faces</groupId>
                <artifactId>jsf-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.xml</groupId>
                <artifactId>jaxrpc-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.xml.ws</groupId>
                <artifactId>jaxws-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.codehaus.jackson</groupId>
                <artifactId>jackson-mapper-asl</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-oxm</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.portlet</groupId>
                <artifactId>portlet-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

Answer 1

由于名为 'Dependency Mediation' 的 Maven 概念，您将无法在项目中拥有两个不同版本的依赖项。查看 Maven Introduction to the Dependency Mechanism 文档。

Dependency mediation - this determines what version of a dependency will be used when multiple versions of an artifact are encountered. Currently, Maven 2.0 only supports using the "nearest definition" which means that it will use the version of the closest dependency to your project in the tree of dependencies. You can always guarantee a version by declaring it explicitly in your project's POM. Note that if two dependency versions are at the same depth in the dependency tree, until Maven 2.0.8 it was not defined which one would win, but since Maven 2.0.9 it's the order in the declaration that counts: the first declaration wins.

多个 spring 不同版本的依赖

Multiple spring dependencies of different versions

dependencies

pom.xml

maven

spring-boot