出现错误java.lang.NoClassDefFoundError:在Jboss EAP 6.4.x中部署时，sun/net/www/protocol/https/HttpsURLConnectionImpl [英] Getting Error java.lang.NoClassDefFoundError: sun/net/www/protocol/https/HttpsURLConnectionImpl when deployed in Jboss EAP 6.4.x

问题描述

我正在使用java.net编写一个REST客户端，该客户端应该执行PATCH请求.但是由于PATCH在java.net中不受支持，因此我通过更改

I am writing a rest client using java.net which should do a PATCH request. But as PATCH is not a supported method in java.net, I used reflection to make it supported by changing the code like

private void updateConnectionToSupportPatchRequest(final HttpURLConnection conn)
    throws ReflectiveOperationException {
    try {
        final Object targetConn;
        if (conn instanceof HttpsURLConnectionImpl) {
            final Field delegateField = HttpsURLConnectionImpl.class.getDeclaredField("delegate");
            delegateField.setAccessible(true);
            targetConn = delegateField.get(conn);
        } else {
            targetConn = conn;
        }
        final Field methodField = HttpURLConnection.class.getDeclaredField("method");
        methodField.setAccessible(true);
        methodField.set(targetConn, "PATCH");
    } catch (final NoSuchFieldException ex) {
        LOGGER.error("NoSuchFieldException: {} ", ex.getMessage());
    }
}

但是当我在JBoss中部署使用我的rest客户端的应用程序时，出现此错误-

but when I deploy my application which uses my rest client in JBoss, I get this error -

java.lang.NoClassDefFoundError:sun/net/www/protocol/https/HttpsURLConnectionImpl

我检查了此错误，并发现了该帖子 http://planet.jboss.org/post/dealing_with_sun_jdk_related_noclassdeffounderror_under_jboss

I looked up on this error and came across this post http://planet.jboss.org/post/dealing_with_sun_jdk_related_noclassdeffounderror_under_jboss

我在帖子中尝试了建议的解决方案，但仍然遇到相同的错误.关于如何解决此问题的任何想法?

I tried the suggested solution in the post still getting the same error. Any ideas on how to get passed this issue?

P.S.我不能使用Apache HttpClient或RestEasy(Jboss)，因为项目中使用了另一个不支持Apache HttpClient的3PP

P.S. I cannot use the Apache HttpClient or RestEasy(Jboss) as there is another 3PP being used in the project which does not support Apache HttpClient

推荐答案

您是否尝试过使用解决方法X-HTTP-Method-Override ，然后尝试弄弄JDK的内部类?在这种情况下，您可以使用实例的getClass方法访问字段，并使用isAssignableFrom替代instanceof.

Have you tried using the workaround X-HTTP-Method-Override before trying to fiddle with internal classes of the JDK? If that's the case, you can use the instance's getClass-method to access fields and use isAssignableFrom as alternative to instanceof.

摆脱指定具体类的另一种方法是尝试在HttpsURLConnection中获取该字段，并假设找不到该字段，则假定使用非Https-URLConnection.这可能看起来像以下代码:

Another approach to get rid off specifying concrete classes is just trying to get the field in HttpsURLConnection and assuming a non-Https-URLConnection if the field can't be found. This might look like the following code:

private void updateConnectionToSupportPatchRequest(final HttpURLConnection conn) 
    throws ReflectiveOperationException {
    try {
        final Object targetConn = conn;
        try {
            final Field delegateField = findField(conn.getClass(), "delegate");
            delegateField.setAccessible(true);
            targetConn = delegateField.get(conn);
        }
        catch(NoSuchFieldException nsfe) {
            // no HttpsURLConnection
        }
        final Field methodField = findField(conn.getClass(), "method");
        methodField.setAccessible(true);
        methodField.set(targetConn, "PATCH");
    } catch (final NoSuchFieldException ex) {
        LOGGER.error("NoSuchFieldException: {} ", ex.getMessage());
    }
}

private Field findField(Class clazz, String name) throws NoSuchFieldException {
    while (clazz != null) {
        try {
            return clazz.getDeclaredField(name);
        }
        catch(NoSuchFieldException nsfe) {
            // ignore
        }
        clazz = clazz.getSuperclass();
    }
    throw new NoSuchFieldException(name);
}

但这可能会在另一个级别上失败，因为-显然-JBoss中使用的类不是您实现的替代方法，因此字段和方法的名称可能不同.

But this might fail at another level because - obviously - the class that is used within JBoss is not the one you implemented the workaround, so fields and methods might be named differently.

这篇关于出现错误java.lang.NoClassDefFoundError:在Jboss EAP 6.4.x中部署时，sun/net/www/protocol/https/HttpsURLConnectionImpl的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！