在盯着Tomcat时,我收到以下错误:
SEVERE: Exception looking up UserDatabase under key UserDatabase
javax.naming.NameNotFoundException: Name UserDatabase is not bound in this Context
at org.apache.naming.NamingContext.lookup(NamingContext.java:770)
at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
at org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:253)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1049)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Jul 6, 2012 4:32:25 PM org.apache.catalina.startup.Catalina start
SEVERE: Catalina.start:
LifecycleException: No UserDatabase component found under key UserDatabase
at org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:261)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1049)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at …在我的应用程序中,JAXB输出生成如下:
this.marshalOut(jaxb_Object, fileOutputStream);
这是对生成XML文件的spring Object XML Mapping Marshallers的方法调用.现在,我也喜欢在这一行之后生成JSON文件.任何人都有关于使用JAXB输入生成JSON输出的想法.
我在网上找到了这个示例代码:
ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector introspector = new JacksonAnnotationIntrospector();
// make deserializer use JAXB annotations (only)
mapper.getDeserializationConfig().setAnnotationIntrospector(introspector);
// make serializer use JAXB annotations (only)
mapper.getSerializationConfig().setAnnotationIntrospector(introspector);
mapper.writeValue( outputStream, jaxb_object);
本setAnnotationIntrospector已过时,是否有解决这个问题的任何其他方式？