Java OSGi:缺少要求OSGi.willing.package

我写了一个包含5个模块的项目。我使用intellij IDEA和maven创建它们，然后向所有模块添加“OSGi”框架支持。我使用maven bundle插件来配置导出包和导入包。但当我运行它时，总会出现一个错误：

org.osgi.framework.BundleException: Unable to resolve org.gxkl.launcher [12]  (R 12.0): missing requirement [org.gxkl.launcher [12](R 12.0)]    osgi.wiring.package; (osgi.wiring.package=org.gxkl.server).

启动器模块包含Bundle Activator，org.gxkl.server包位于服务模块中。我使用类似的pom来配置模块，但只有服务模块出错。 launcher中的pom文件如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
    <artifactId>${parent.artifactId}</artifactId>
    <groupId>${parent.groupId}</groupId>
    <version>${parent.version}</version>
</parent>
<modelVersion>${model.version}</modelVersion>

<artifactId>launcher</artifactId>

<packaging>bundle</packaging>

<dependencies>
    ...
    <dependency>
        <groupId>${project.groupId}</groupId>
        <artifactId>service</artifactId>
        <version>${project.version}</version>
    </dependency>
    ...
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-source-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
        </plugin>

        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Bundle-Activator>org.gxkl.Starter</Bundle-Activator>
                    <Export-Package>
                        org.gxkl
                    </Export-Package>
                    <Import-Package>
                    <!--some packages in other modules. They work fine-->
                        ...
                        org.gxkl.server <!--packge in service modules. It doesn't work fine-->
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
    <artifactId>${parent.artifactId}</artifactId>
    <groupId>${parent.groupId}</groupId>
    <version>${parent.version}</version>
</parent>
<modelVersion>${model.version}</modelVersion>

<artifactId>service</artifactId>

<packaging>bundle</packaging>

<description>...</description>

<dependencies>
    ...
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-source-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
        </plugin>

        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Export-Package>
                        org.gxkl.server,
                        ...
                    </Export-Package>
                    <Import-Package>
                        ...
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

${parent.artifactId}
${parent.groupId}
${parent.version}
${model.version}
发射装置
捆
...
${project.groupId}
服务
${project.version}
...
org.apache.maven.plugins
maven源插件
org.apache.maven.plugins
maven编译器插件
org.apache.felix
maven捆绑插件
真的
org.gxkl.Starter
org.gxkl
...
org.gxkl.server

正在使用的pom文件如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
    <artifactId>${parent.artifactId}</artifactId>
    <groupId>${parent.groupId}</groupId>
    <version>${parent.version}</version>
</parent>
<modelVersion>${model.version}</modelVersion>

<artifactId>launcher</artifactId>

<packaging>bundle</packaging>

<dependencies>
    ...
    <dependency>
        <groupId>${project.groupId}</groupId>
        <artifactId>service</artifactId>
        <version>${project.version}</version>
    </dependency>
    ...
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-source-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
        </plugin>

        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Bundle-Activator>org.gxkl.Starter</Bundle-Activator>
                    <Export-Package>
                        org.gxkl
                    </Export-Package>
                    <Import-Package>
                    <!--some packages in other modules. They work fine-->
                        ...
                        org.gxkl.server <!--packge in service modules. It doesn't work fine-->
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
    <artifactId>${parent.artifactId}</artifactId>
    <groupId>${parent.groupId}</groupId>
    <version>${parent.version}</version>
</parent>
<modelVersion>${model.version}</modelVersion>

<artifactId>service</artifactId>

<packaging>bundle</packaging>

<description>...</description>

<dependencies>
    ...
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-source-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
        </plugin>

        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Export-Package>
                        org.gxkl.server,
                        ...
                    </Export-Package>
                    <Import-Package>
                        ...
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

${parent.artifactId}
${parent.groupId}
${parent.version}
${model.version}
服务
捆
...
...
org.apache.maven.plugins
maven源插件
org.apache.maven.plugins
maven编译器插件
org.apache.felix
maven捆绑插件
真的
org.gxkl.server，
...
...

---

错误消息意味着bundle

启动器导入包
org.gxkl.server
，但框架中没有导出包的bundle

顺便说一下，您可以从POM中删除
部分。不需要它们。
很抱歉这么晚才回复您。正如您在
service
的pom文件中所看到的，我导出了
org.gxkl.server
。但是为什么它在这个模块中不起作用呢？我不知道。POM是一个构建时构造，因此在构建和部署期间可能发生任何事情。我真的需要查看实际包的MANIFEST.MF。好吧，你说这是因为框架中没有导出包的包。因此，我重新检查了设置，发现我在felix的设置中犯了一个错误，因此felix在运行时找不到
服务
包。现在，我的项目很好，谢谢你。