java - NoSuchMethodError : org. codehaus.jackson.type.JavaType

Question

我的应用程序抛出以下错误，尽管我的应用程序中有 jackson-core-asl-1.4.2 和 jackson-mapper-asl-1.4.2

Caused by: java.lang.NoSuchMethodError: org.codehaus.jackson.type.JavaType.<init>(Ljava/lang/Class;)V
    at org.codehaus.jackson.map.type.SimpleType.<init>(SimpleType.java:32)
    at org.codehaus.jackson.map.type.TypeFactory._fromClass(TypeFactory.java:254)
    at org.codehaus.jackson.map.type.TypeFactory._fromType(TypeFactory.java:266)
    at org.codehaus.jackson.map.type.TypeFactory.type(TypeFactory.java:57)
    at org.codehaus.jackson.map.ObjectMapper.<clinit>(ObjectMapper.java:49)
    at org.springframework.web.servlet.view.json.MappingJacksonJsonView.<init>(MappingJacksonJsonView.java:59)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:126)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:134)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 48 more
.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:126)
    at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:134)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 48 more

可能是什么原因？应用程序之前工作并将代码提交给 SVN 真的很奇怪，然后当我 checkout 并重新运行所有内容时我收到此错误...

Answer 1

这看起来几乎可以肯定是由于“核心”和“映射器”jar 版本不兼容造成的。您可能通过类路径使用了不兼容的版本。