带有Spring Boot应用程序的buildNumber插件maven不能与Tomcat一起工作

Question

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>buildnumber-maven-plugin</artifactId>
    <version>1.4</version>
</plugin>

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
</plugin>

当我在tomcat(apache-tomcat-8.0.33)中作为根应用程序启动它时，将资源提取到根目录中（没有使用WAR文件），应用程序无法找到我的buildnumber。

查找BuildNumber的方法如下所示：

@PostConstruct
private void init() {
    try {
        Enumeration<URL> resources = getClass().getClassLoader().getResources("META-INF/MANIFEST.MF");
        while (resources.hasMoreElements()) {
            URL url = resources.nextElement();
            LOGGER.debug("Looking into URL: {} for BuildNumnber", url);
            Manifest manifest = new Manifest(url.openStream());
            Attributes mainAttributes = manifest.getMainAttributes();
            if (mainAttributes != null) {
                Object obj = mainAttributes.get(IMPLEMENTATION_BUILD);
                if (obj != null) {
                    buildNumber = obj;
                    LOGGER.info("Found P3J Build Number: " + buildNumber);
                    break;
                }
            }
        }
    } catch (Exception e) {
        LOGGER.error("Unable to determine build number. {}", e);
    }
}

有什么建议吗？

Answer 1

看来这个方法解决了我的问题：

@RestController
@RequestMapping("/build")
public class BuildNumberResource {

@Autowired
private ServletContext servletContext;

@PostConstruct
private void init() {

    try {
        InputStream inputStream = servletContext.getResourceAsStream("/META-INF/MANIFEST.MF");
        Manifest manifest = new Manifest(inputStream);
        Attributes mainAttributes = manifest.getMainAttributes();
        if (mainAttributes != null) {
            Object obj = mainAttributes.get(IMPLEMENTATION_BUILD);
            if (obj != null) {
                buildNumber = obj;
                LOGGER.info("Found P3J Build Number in ServletContext.MANIFEST: " + buildNumber);
                return;
            }
        }
    } catch (IOException e) {
        LOGGER.error("Unable to extract BuildNumber from ServletContext. {}", e);
    }

//编辑

看起来第二部分不再需要了

    try {
        Enumeration<URL> resources = getClass().getClassLoader().getResources("META-INF/MANIFEST.MF");
        while (resources.hasMoreElements()) {
            URL url = resources.nextElement();
            LOGGER.debug("Looking into URL: {} for BuildNumnber", url);
            Manifest manifest = new Manifest(url.openStream());
            Attributes mainAttributes = manifest.getMainAttributes();
            if (mainAttributes != null) {
                Object obj = mainAttributes.get(IMPLEMENTATION_BUILD);
                if (obj != null) {
                    buildNumber = obj;
                    LOGGER.info("Found P3J Build Number: " + buildNumber);
                    return;
                }
            }
        }
    } catch (Exception e) {
        LOGGER.error("Unable to determine build number. {}", e);
    }
}