相关疑难解决方法(0)

我正在努力学习Gson,而我正在努力进行场上排斥.这是我的课程

public class Student {    
  private Long                id;
  private String              firstName        = "Philip";
  private String              middleName       = "J.";
  private String              initials         = "P.F";
  private String              lastName         = "Fry";
  private Country             country;
  private Country             countryOfBirth;
}

public class Country {    
  private Long                id;
  private String              name;
  private Object              other;
}

我可以使用GsonBuilder并添加ExclusionStrategy像一个字段名称firstName或country,但我似乎无法管理排除像某些领域的性能country.name.

使用该方法public boolean shouldSkipField(FieldAttributes fa),FieldAttributes不包含足够的信息来匹配具有过滤器的字段country.name.

对于这个问题的解决方案,我将不胜感激.

PS:我想避免注释,因为我想对此进行改进并使用RegEx来过滤字段.

谢谢

编辑:我试图看看是否可以模拟Struts2 JSON插件的行为

使用Gson

<interceptor-ref name="json">
  <param name="enableSMD">true</param>
  <param name="excludeProperties">
    login.password, …

我想将一个对象传递给一个bundle.现在我用GSON转换为Json对象.

bundle被传递,bundle有正确的字符串表示,但是当我从字符串创建对象时,我得到了一个巨大的错误.

FATAL EXCEPTION: main
    java.lang.RuntimeException: Failed to invoke private android.net.Uri() with no args
            at com.google.gson.internal.ConstructorConstructor$3.construct(ConstructorConstructor.java:107)
            at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:162)
            at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
            at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
            at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
            at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
            at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
            at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
            at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
            at com.google.gson.Gson.fromJson(Gson.java:803)
            at com.google.gson.Gson.fromJson(Gson.java:768)
            at com.google.gson.Gson.fromJson(Gson.java:717)
            at com.google.gson.Gson.fromJson(Gson.java:689)
            at com.test.fragment.QFragment.onCreateView(QFragment.java:54)
            at android.app.Fragment.performCreateView(Fragment.java:1788)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:899)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1101)
            at android.app.BackStackRecord.run(BackStackRecord.java:688)
            at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1559)
            at android.app.FragmentManagerImpl$1.run(FragmentManager.java:445)
            at android.os.Handler.handleCallback(Handler.java:730)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:158)
            at android.app.ActivityThread.main(ActivityThread.java:5789)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:843)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.InstantiationException: can't instantiate class …