电梯json：java的自定义序列化程序8 LocalDateTime抛出映射异常

我有一个名为child2，我想序列化和反序列化我的类包含LocalDateTime属性，我必须编写自定义序列化程序，我试着用这两个解决方案但这两个被抛出异常这里是我的代码电梯json：java的自定义序列化程序8 LocalDateTime抛出映射异常

解决方案1

case class Child2(var str:String,var Num:Int,MyList:List[Int],val myDate : LocalDateTime = LocalDateTime.now()){ 
         var number:Int=555 
         } 
class Message1SerializerDateTime extends Serializer[LocalDateTime]{ 
private val LocalDateTimeClass = classOf[LocalDateTime] 

    def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), LocalDateTime] = { 
    case (TypeInfo(LocalDateTimeClass, _), json) => json match { 
     case JString(dt) => LocalDateTime.parse(dt) 
     case x => throw new MappingException("Can't convert " + x + " to LocalDateTime") 
    } 
    } 

    def serialize(implicit format: Formats): PartialFunction[Any, JValue] = { 
    case x: LocalDateTime => JString(x.toString) 
    } 
} 

    object MessageTest extends App { 

implicit val formats = /*Serialization.formats(NoTypeHints)*/DefaultFormats + new FieldSerializer[Child2]+new Message1SerializerDateTime 
     var c= new Child2("Mary", 5,List(1, 2),LocalDateTime.now()) 

         c.number=1 
        // println("number"+c.number) 
       val ser = write(c) 
        println("Child class converted to string" +ser) 
        var obj=read[Child2](ser) 
        println("object of Child is "+obj) 
        println("str"+obj.str) 
        println("Num"+obj.Num) 
        println("MyList"+obj) 
        println("myDate"+obj.myDate) 
        println("number"+obj.number) 

}

及其投掷mapping exception

Child class converted to string{"number":1,"str":"Mary","Num":5,"MyList":[1,2],"myDate":"2015-07-28T16:45:44.030"} 
[error] (run-main-2) net.liftweb.json.MappingException: unknown error 
net.liftweb.json.MappingException: unknown error 
    at net.liftweb.json.Extraction$.extract(Extraction.scala:46) 
    at net.liftweb.json.JsonAST$JValue.extract(JsonAST.scala:312) 
    at net.liftweb.json.Serialization$.read(Serialization.scala:58) 
    at MessageTest$.delayedEndpoint$MessageTest$1(MessageTest.scala:42) 
    at MessageTest$delayedInit$body.apply(MessageTest.scala:15) 
    at scala.Function0$class.apply$mcV$sp(Function0.scala:40) 
    at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.collection.immutable.List.foreach(List.scala:383) 
    at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35) 
    at scala.App$class.main(App.scala:76) 
    at MessageTest$.main(MessageTest.scala:15) 
    at MessageTest.main(MessageTest.scala) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
Caused by: java.lang.ArrayIndexOutOfBoundsException: 49938 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:451) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:431) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:492) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:337) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer.lookupParameterNames(BytecodeReadingParanamer.java:100) 
    at com.thoughtworks.paranamer.CachingParanamer.lookupParameterNames(CachingParanamer.java:75) 
    at com.thoughtworks.paranamer.CachingParanamer.lookupParameterNames(CachingParanamer.java:68) 
    at net.liftweb.json.Meta$ParanamerReader$.lookupParameterNames(Meta.scala:89) 
    at net.liftweb.json.Meta$Reflection$.argsInfo$1(Meta.scala:237) 
    at net.liftweb.json.Meta$Reflection$.constructorArgs(Meta.scala:253) 
    at net.liftweb.json.Meta$Reflection$$anonfun$constructors$1.apply(Meta.scala:227) 
    at net.liftweb.json.Meta$Reflection$$anonfun$constructors$1.apply(Meta.scala:227) 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) 
    at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33) 
    at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186) 
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:245) 
    at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:186) 
    at net.liftweb.json.Meta$Reflection$.constructors(Meta.scala:227) 
    at net.liftweb.json.Meta$.net$liftweb$json$Meta$$constructors$1(Meta.scala:97) 
    at net.liftweb.json.Meta$.mkConstructor$1(Meta.scala:124) 
    at net.liftweb.json.Meta$.fieldMapping$1(Meta.scala:151) 
    at net.liftweb.json.Meta$.net$liftweb$json$Meta$$toArg$1(Meta.scala:155) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1$$anonfun$apply$1.apply(Meta.scala:99) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1$$anonfun$apply$1.apply(Meta.scala:98) 
    at scala.collection.immutable.List.map(List.scala:278) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1.apply(Meta.scala:98) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1.apply(Meta.scala:97) 
    at scala.collection.immutable.List.map(List.scala:274) 
    at net.liftweb.json.Meta$.net$liftweb$json$Meta$$constructors$1(Meta.scala:97) 
    at net.liftweb.json.Meta$$anonfun$mappingOf$1.apply(Meta.scala:169) 
    at net.liftweb.json.Meta$$anonfun$mappingOf$1.apply(Meta.scala:161) 
    at net.liftweb.json.Meta$Memo.memoize(Meta.scala:199) 
    at net.liftweb.json.Meta$.mappingOf(Meta.scala:161) 
    at net.liftweb.json.Extraction$.net$liftweb$json$Extraction$$mkMapping$1(Extraction.scala:194) 
    at net.liftweb.json.Extraction$.net$liftweb$json$Extraction$$extract0(Extraction.scala:199) 
    at net.liftweb.json.Extraction$.extract(Extraction.scala:43) 
    at net.liftweb.json.JsonAST$JValue.extract(JsonAST.scala:312) 
    at net.liftweb.json.Serialization$.read(Serialization.scala:58) 
    at MessageTest$.delayedEndpoint$MessageTest$1(MessageTest.scala:42) 
    at MessageTest$delayedInit$body.apply(MessageTest.scala:15) 
    at scala.Function0$class.apply$mcV$sp(Function0.scala:40) 
    at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.collection.immutable.List.foreach(List.scala:383) 
    at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35) 
    at scala.App$class.main(App.scala:76) 
    at MessageTest$.main(MessageTest.scala:15) 
    at MessageTest.main(MessageTest.scala) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497)

解决方案2

case class Child2(var str:String,var Num:Int,MyList:List[Int],val myDate : LocalDateTime = LocalDateTime.now()){ 
                                     var number:Int=555 
                                     } 
class Message1Serializer extends Serializer[Child2]{ 
    private val IntervalClass = classOf[Child2] 

    def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), Child2] = { 
case (TypeInfo(IntervalClass, _), json) => json match { 
    case JObject(
    JField("str", JString(str)) :: JField("Num", JInt(num)) :: 
    JField("MyList", JArray(mylist)) :: (JField("myDate", JString(mydate)) :: 
    JField("number", JInt(number)) ::Nil) 
) => { 
    val c = Child2(
     str, num.intValue(), mylist.map(_.values.toString.toInt), LocalDateTime.parse(mydate) 
    ) 
    c.number = number.intValue() 
    c 
    } 
    case x => throw new MappingException("Can't convert " + x + " to Interval") 
} 
} 
    def serialize(implicit format: Formats): PartialFunction[Any, JValue] = { 
case x: Child2 => 
    JObject(
    JField("str", JString(x.str)) :: JField("Num", JInt(x.Num)) :: 
    JField("MyList", JArray(x.MyList.map(JInt(_)))) :: 
    JField("myDate", JString(x.myDate.toString)) :: 
    JField("number", JInt(x.number)) :: Nil 
) 
} 
} 

object MessageTest extends App 
{ 
implicit val formats = /*Serialization.formats(NoTypeHints)*/DefaultFormats+new Message1Serializer 
     var c= new Child2("Mary", 5,List(1, 2),LocalDateTime.now()) 

         c.number=1 
        // println("number"+c.number) 
       val ser = write(c) 
        println("Child class converted to string" +ser) 
        var obj=read[Child2](ser) 
        println("object of Child is "+obj) 
        println("str"+obj.str) 
        println("Num"+obj.Num) 
        println("MyList"+obj) 
        println("myDate"+obj.myDate) 
        println("number"+obj.number) 
}

其还抛出异常映射

Child class converted to string{"str":"Mary","Num":5,"MyList":[1,2],"myDate":"2015-07-28T17:09:31.512","number":1} 
[error] (run-main-1) net.liftweb.json.MappingException: unknown error 
net.liftweb.json.MappingException: unknown error 
    at net.liftweb.json.Extraction$.extract(Extraction.scala:46) 
    at net.liftweb.json.JsonAST$JValue.extract(JsonAST.scala:312) 
    at net.liftweb.json.Serialization$.read(Serialization.scala:58) 
    at MessageTest$.delayedEndpoint$MessageTest$1(MessageTest.scala:58) 
    at MessageTest$delayedInit$body.apply(MessageTest.scala:15) 
    at scala.Function0$class.apply$mcV$sp(Function0.scala:40) 
    at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.collection.immutable.List.foreach(List.scala:383) 
    at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35) 
    at scala.App$class.main(App.scala:76) 
    at MessageTest$.main(MessageTest.scala:15) 
    at MessageTest.main(MessageTest.scala) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
Caused by: java.lang.ArrayIndexOutOfBoundsException: 49938 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:451) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:431) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:492) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.<init>(BytecodeReadingParanamer.java:337) 
    at com.thoughtworks.paranamer.BytecodeReadingParanamer.lookupParameterNames(BytecodeReadingParanamer.java:100) 
    at com.thoughtworks.paranamer.CachingParanamer.lookupParameterNames(CachingParanamer.java:75) 
    at com.thoughtworks.paranamer.CachingParanamer.lookupParameterNames(CachingParanamer.java:68) 
    at net.liftweb.json.Meta$ParanamerReader$.lookupParameterNames(Meta.scala:89) 
    at net.liftweb.json.Meta$Reflection$.argsInfo$1(Meta.scala:237) 
    at net.liftweb.json.Meta$Reflection$.constructorArgs(Meta.scala:253) 
    at net.liftweb.json.Meta$Reflection$$anonfun$constructors$1.apply(Meta.scala:227) 
    at net.liftweb.json.Meta$Reflection$$anonfun$constructors$1.apply(Meta.scala:227) 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245) 
    at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33) 
    at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186) 
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:245) 
    at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:186) 
    at net.liftweb.json.Meta$Reflection$.constructors(Meta.scala:227) 
    at net.liftweb.json.Meta$.net$liftweb$json$Meta$$constructors$1(Meta.scala:97) 
    at net.liftweb.json.Meta$.mkConstructor$1(Meta.scala:124) 
    at net.liftweb.json.Meta$.fieldMapping$1(Meta.scala:151) 
    at net.liftweb.json.Meta$.net$liftweb$json$Meta$$toArg$1(Meta.scala:155) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1$$anonfun$apply$1.apply(Meta.scala:99) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1$$anonfun$apply$1.apply(Meta.scala:98) 
    at scala.collection.immutable.List.map(List.scala:278) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1.apply(Meta.scala:98) 
    at net.liftweb.json.Meta$$anonfun$net$liftweb$json$Meta$$constructors$1$1.apply(Meta.scala:97) 
    at scala.collection.immutable.List.map(List.scala:274) 
    at net.liftweb.json.Meta$.net$liftweb$json$Meta$$constructors$1(Meta.scala:97) 
    at net.liftweb.json.Meta$$anonfun$mappingOf$1.apply(Meta.scala:169) 
    at net.liftweb.json.Meta$$anonfun$mappingOf$1.apply(Meta.scala:161) 
    at net.liftweb.json.Meta$Memo.memoize(Meta.scala:199) 
    at net.liftweb.json.Meta$.mappingOf(Meta.scala:161) 
    at net.liftweb.json.Extraction$.net$liftweb$json$Extraction$$mkMapping$1(Extraction.scala:194) 
    at net.liftweb.json.Extraction$.net$liftweb$json$Extraction$$extract0(Extraction.scala:199) 
    at net.liftweb.json.Extraction$.extract(Extraction.scala:43) 
    at net.liftweb.json.JsonAST$JValue.extract(JsonAST.scala:312) 
    at net.liftweb.json.Serialization$.read(Serialization.scala:58) 
    at MessageTest$.delayedEndpoint$MessageTest$1(MessageTest.scala:58) 
    at MessageTest$delayedInit$body.apply(MessageTest.scala:15) 
    at scala.Function0$class.apply$mcV$sp(Function0.scala:40) 
    at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.App$$anonfun$main$1.apply(App.scala:76) 
    at scala.collection.immutable.List.foreach(List.scala:383) 
    at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35) 
    at scala.App$class.main(App.scala:76) 
    at MessageTest$.main(MessageTest.scala:15) 
    at MessageTest.main(MessageTest.scala) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497)

请帮助我，我怎么能。如何，我应该写串行器的Java 8 LocalDateTime

来源

2015-07-28 swaheed

看起来像乘电梯JSON的使用paranamer库的问题 - https://github.com/paul-hammant/paranamer/issues/17 –

我用“抬尝试-json“％”3.0-M5“和”3.0-M6“，但仍然出现相同的错误。 –

我依稀记得解决这个问题有一个类似的问题，我通过与相应的DateTimeFormat类解析

LocalDateTime.parse(dt, DateTimeFormatter.ofPattern("yyyy-MM-ddTHH:mm"))

更正你的情况下，模式

来源

2015-07-28 13:16:58

没有错误保持不变 – swaheed

电梯json：java的自定义序列化程序8 LocalDateTime抛出映射异常

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