原因：java.lang.ClassCastException：org.jboss.vfs.protocol.VirtualFileURLConnection 无法转换为 java.net.JarURLConnection

Question

URL jarURL = ExternalOrdersManagerUtils.class.getClassLoader().getResource("com/session/utils/ExternalOrdersManagerUtils.class");
        JarURLConnection jurlConn = null;
        try {
            jurlConn = (JarURLConnection)jarURL.openConnection();
        } catch (IOException e) {
            logger.error(e.getMessage(),e);
        }
        Manifest mf = null;
        try {
            mf = jurlConn.getManifest();
        } catch (IOException e) {
            logger.error(e.getMessage(),e);
        }
        Attributes attr = mf.getMainAttributes();

我用的是Java8版本和jboss-6.1.0.Final_cp版本部署服务器。我收到如下错误。请帮我解决这个问题。

java.lang.ClassCastException: org.jboss.vfs.protocol.VirtualFileURLConnection 无法转换为 java.net.JarURLConnectionad.run(Thread.java:748) [:1.8.0_261]

Answer 1

您应该使用

加载清单

new Manifest(ExternalOrdersManagerUtils.class.getClassLoader().getResourceAsStream("/META-INF/manifest.mf"));

原因：java.lang.ClassCastException：org.jboss.vfs.protocol.VirtualFileURLConnection 无法转换为 java.net.JarURLConnection

Caused by: java.lang.ClassCastException: org.jboss.vfs.protocol.VirtualFileURLConnection cannot be cast to java.net.JarURLConnection

jboss

jboss6.x