Java Wurfl 实现异常

Question

我遇到了以下错误，请帮助我哪里做错了

ERROR n.s.wurfl.core.GeneralWURFLEngine - cannot initialize: java.lang.NullPointerException: in is null
java.lang.NullPointerException: in is null
    at java.util.zip.ZipInputStream.<init>(ZipInputStream.java:100) ~[na:1.7.0_72]
    at java.util.zip.ZipInputStream.<init>(ZipInputStream.java:79) ~[na:1.7.0_72]
    at net.sourceforge.wurfl.core.resource.FileLoader.fromZipFile(FileLoader.java:248) ~[wurfl-1.5.jar:na]
    at net.sourceforge.wurfl.core.resource.FileLoader.openInputStream(FileLoader.java:230) ~[wurfl-1.5.jar:na]

wurfl.zip 在/web-inf/里面，我的 wurfl spring 配置在下面

    <bean id="net.sourceforge.wurfl.core.WURFLEngine" class="net.sourceforge.wurfl.core.GeneralWURFLEngine">        
    <constructor-arg index="0" value="classpath:/wurfl.zip" />
    <property name="engineTarget" value="performance" />

上面实现的代码是

WebApplicationContext wac = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
WURFLEngine holder = (WURFLEngine)wac.getBean(WURFLEngine.class.getName());
System.out.println("debugging request: "+request+"  ==wurflholder: "+holder+ " Holder String "+holder.toString());

显示的输出:

debugging request: org.apache.catalina.core.ApplicationHttpRequest@133b7e9
==wurflholder: net.sourceforge.wurfl.core.GeneralWURFLEngine@6f28c4 
==Holder: String net.sourceforge.wurfl.core.GeneralWURFLEngine@6f28c4

但是下面的代码报错了

try{
    device = holder.getDeviceForRequest(request); //This is giving exception 

    }
    catch(Exception e ){e.printStackTrace();}

请指教。

Answer 1

/web-inf/目录不在classpath中，导致抛出异常。

尝试将您的 wurfl.zip 放在 /web-inf/classes 中，以便正确加载它。