JFinal的renderJson在处理Enum的问题?报错

@JFinal 你好，非常感谢你的框架，这让我在工作中省了不少事。

我的类中有Enum字段，在调用renderJson()函数时会报错，如下：

[ERROR]-[Thread: qtp1007764900-19]-[com.jfinal.core.ActionHandler.handle()]: /car/all
java.lang.RuntimeException: Class com.jfinal.kit.JsonKit can not access a member of class sun.misc.Launcher$ExtClassLoader with modifiers "public static"
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:248)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:269)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:269)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:269)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:269)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:269)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:269)
	at com.jfinal.kit.JsonKit.otherToJson(JsonKit.java:230)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:202)
	at com.jfinal.kit.JsonKit.listToJson(JsonKit.java:99)
	at com.jfinal.kit.JsonKit.toJson(JsonKit.java:199)
	at com.jfinal.kit.JsonKit.toKeyValue(JsonKit.java:74)
	at com.jfinal.kit.JsonKit.mapToJson(JsonKit.java:60)
	at com.jfinal.render.JsonRender.buildJsonText(JsonRender.java:127)
	at com.jfinal.render.JsonRender.render(JsonRender.java:88)
	at com.jfinal.core.ActionHandler.handle(ActionHandler.java:94)
	at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:560)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1072)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:382)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1006)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:365)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485)
	at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalAccessException: Class com.jfinal.kit.JsonKit can not access a member of class sun.misc.Launcher$ExtClassLoader with modifiers "public static"
	at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:95)
	at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:261)
	at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:253)
	at java.lang.reflect.Method.invoke(Method.java:594)
	at com.jfinal.kit.JsonKit.beanToJson(JsonKit.java:245)
	... 63 more

通过调试发现，主要是Enum类的getDeclaringClass方法导致的。在类JsonKit的toJson方法中加入如下代码基本解决了该问题：

public static String toJson(Object value, int depth) {
	......
	if(value instanceof Enum)
			return "\"" + ((Enum)value).name() + "\"";
	......
}