appengine错误 - java.security.AccessControlException：访问被拒绝（" java.lang.RuntimePermission"" accessClassInPackage.com.sun.org.apache.xerces [英] appengine error - java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessClassInPackage.com.sun.org.apache.xerces

问题描述

我重新部署了我的应用程序（google appengine），它似乎工作正常，但是当我尝试解析Xml时，得到：
java.security.AccessControlException：access denied（java.lang.RuntimePermission accessClassInPackage.com.sun.org.apache.xerces.internal.parsers）

这是什么意思？和我如何解决它？

在应用程序的以前版本中，我没有得到这个错误。

在本地运行应用程序时，我不会收到此错误。

我做了一些小改动 - 我将一些数据从用户界面传递到数据存储区

以下是解析XML的代码：

  public static< T extends BaseDataObject> T xml2Bean（Class< T> clazz，
 String xmlData）抛出UnsupportedEncodingException，JAXBException {
 Reader reader = new StringReader（xmlData）; 
 JAXBContext context = getContext（clazz）; 
 Unmarshaller um = context.createUnmarshaller（）; 
 return（T）um.unmarshal（reader）; 
} 
  

我的猜测是Google用来支持 com。 sun.org.apache.xerces.internal.parsers 但现在他们不这样做，而且我的旧代码仍然可以工作，因为它仍然被支持时被推送...

我如何验证这个猜测？即我在哪里可以找到不支持的软件包列表？

我在考虑删除XML代码并使用json，我怎样才能确保支持json？ / b>解决方案问题已解决：我已下载xerces并将jar添加到war \WEB-INF\lib和在eclipse中构建路径。

我也升级到最新的JDK（java 7）。

我是不知道哪些人解决了这个问题......

I re-deployed my app (google appengine), it seems to be working fine, but when I try to parse Xml I get: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessClassInPackage.com.sun.org.apache.xerces.internal.parsers")

what does it mean? and how I can solve it?

on previous version of the app I didn't got this error.

when running the app locally I don't get this error.

I made minor changes - I pass some data from the UI to the datastore

Here is the code that parse the XML:

public static <T extends BaseDataObject> T xml2Bean(Class<T> clazz,
        String xmlData) throws UnsupportedEncodingException, JAXBException {
    Reader reader = new StringReader(xmlData);
    JAXBContext context = getContext(clazz);
    Unmarshaller um = context.createUnmarshaller();
    return (T) um.unmarshal(reader);
}

My guess is that Google use to support com.sun.org.apache.xerces.internal.parsers but now they don't, and my old code still working because it was pushed when it was still supported...

how can I verify this guess? i.e. where can I find the list of unsupported packages?

I'm thinking of dropping the XML code and use json instead, how can I make sure json is supported?

解决方案

Problem was solved: I've downloaded xerces and added the jars to war\WEB-INF\lib and to the build path in eclipse.

I also upgrade to the latest JDK (java 7).

I'm not sure which of those solved the problem...

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